From: Svjatoslav Agejenko Date: Sat, 22 Aug 2020 12:41:56 +0000 (+0300) Subject: added adjustable resistor project documentation X-Git-Url: http://www2.svjatoslav.eu/gitweb/?a=commitdiff_plain;h=e3fa576ed203ebe7dd4a8d395269d3afae17569d;p=physical.git added adjustable resistor project documentation --- diff --git a/index.html b/index.html index d77b64c..a808fdc 100644 --- a/index.html +++ b/index.html @@ -2,7 +2,7 @@ Physical projects - + @@ -321,7 +321,6 @@ git clone https://www2.svjatoslav.eu/git/physical.git -

2.3 Power

@@ -337,10 +336,17 @@ git clone https://www2.svjatoslav.eu/git/physical.git power/battery%20tester/make.png "> + +

adjustable resistor / indicator +

+

+

2.4 USB

@@ -478,7 +484,7 @@ git clone https://www2.svjatoslav.eu/git/physical.git

diff --git a/index.org b/index.org index 9c543a2..1523606 100644 --- a/index.org +++ b/index.org @@ -89,7 +89,6 @@ Collection of physical projects. Electronics, 3D designs etc.. )}}} - ** Power + 12V Lead-Acid battery charger and terminal {{{imglnk( @@ -103,6 +102,13 @@ Collection of physical projects. Electronics, 3D designs etc.. power/battery%20tester/make.png )}}} ++ adjustable resistor / indicator + {{{imglnk( + power/adjustable%20resistor/index.html, + power/adjustable%20resistor/make.png + )}}} + + ** USB + USB cable terminals diff --git a/power/adjustable resistor/KiCad project/project-cache.lib b/power/adjustable resistor/KiCad project/project-cache.lib new file mode 100644 index 0000000..93f6eb9 --- /dev/null +++ b/power/adjustable resistor/KiCad project/project-cache.lib @@ -0,0 +1,86 @@ +EESchema-LIBRARY Version 2.4 +#encoding utf-8 +# +# Connector_USB_A +# +DEF Connector_USB_A J 0 40 Y Y 1 F N +F0 "J" -200 450 50 H V L CNN +F1 "Connector_USB_A" -200 350 50 H V L CNN +F2 "" 150 -50 50 H I C CNN +F3 "" 150 -50 50 H I C CNN +$FPLIST + USB* +$ENDFPLIST +DRAW +C -150 85 25 0 1 10 F +C -25 135 15 0 1 10 F +S -200 -300 200 300 0 1 10 f +S -60 190 -170 210 0 1 0 F +S -50 180 -180 230 0 1 0 N +S -5 -300 5 -270 0 1 0 N +S 10 50 -20 20 0 1 10 F +S 200 -105 170 -95 0 1 0 N +S 200 -5 170 5 0 1 0 N +S 200 195 170 205 0 1 0 N +P 4 0 1 10 -125 85 -100 85 -50 135 -25 135 N +P 4 0 1 10 -100 85 -75 85 -50 35 0 35 N +P 4 0 1 10 25 110 25 60 75 85 25 110 F +P 2 1 1 10 -75 85 25 85 N +X VBUS 1 300 200 100 L 50 50 1 1 W +X D- 2 300 -100 100 L 50 50 1 1 P +X D+ 3 300 0 100 L 50 50 1 1 P +X GND 4 0 -400 100 U 50 50 1 1 W +X Shield 5 -100 -400 100 U 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Device_Lamp +# +DEF Device_Lamp LA 0 1 N N 1 F N +F0 "LA" 25 150 50 H V L CNN +F1 "Device_Lamp" 25 -150 50 H V L CNN +F2 "" 0 100 50 V I C CNN +F3 "" 0 100 50 V I C CNN +DRAW +C 0 0 100 0 1 0 N +P 2 0 1 0 -70 70 70 -70 N +P 2 0 1 0 70 70 -70 -70 N +X - 1 0 -200 100 U 50 50 1 1 P +X + 2 0 200 100 D 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Device_R +# +DEF Device_R R 0 0 N Y 1 F N +F0 "R" 80 0 50 V V C CNN +F1 "Device_R" 0 0 50 V V C CNN +F2 "" -70 0 50 V I C CNN +F3 "" 0 0 50 H I C CNN +$FPLIST + R_* +$ENDFPLIST +DRAW +S -40 -100 40 100 0 1 10 N +X ~ 1 0 150 50 D 50 50 1 1 P +X ~ 2 0 -150 50 U 50 50 1 1 P +ENDDRAW +ENDDEF +# +# Switch_SW_SPST +# +DEF Switch_SW_SPST SW 0 0 Y N 1 F N +F0 "SW" 0 125 50 H V C CNN +F1 "Switch_SW_SPST" 0 -100 50 H V C CNN +F2 "" 0 0 50 H I C CNN +F3 "" 0 0 50 H I C CNN +DRAW +C -80 0 20 0 0 0 N +C 80 0 20 0 0 0 N +P 2 0 0 0 -60 10 60 70 N +X A 1 -200 0 100 R 50 50 1 1 P +X B 2 200 0 100 L 50 50 1 1 P +ENDDRAW +ENDDEF +# +#End Library diff --git a/power/adjustable resistor/KiCad project/project.kicad_pcb b/power/adjustable resistor/KiCad project/project.kicad_pcb new file mode 100644 index 0000000..02c8ecb --- /dev/null +++ b/power/adjustable resistor/KiCad project/project.kicad_pcb @@ -0,0 +1 @@ +(kicad_pcb (version 4) (host kicad "dummy file") ) diff --git a/power/adjustable resistor/KiCad project/project.pro b/power/adjustable resistor/KiCad project/project.pro new file mode 100644 index 0000000..152769c --- /dev/null +++ b/power/adjustable resistor/KiCad project/project.pro @@ -0,0 +1,33 @@ +update=22/05/2015 07:44:53 +version=1 +last_client=kicad +[general] +version=1 +RootSch= +BoardNm= +[pcbnew] +version=1 +LastNetListRead= +UseCmpFile=1 +PadDrill=0.600000000000 +PadDrillOvalY=0.600000000000 +PadSizeH=1.500000000000 +PadSizeV=1.500000000000 +PcbTextSizeV=1.500000000000 +PcbTextSizeH=1.500000000000 +PcbTextThickness=0.300000000000 +ModuleTextSizeV=1.000000000000 +ModuleTextSizeH=1.000000000000 +ModuleTextSizeThickness=0.150000000000 +SolderMaskClearance=0.000000000000 +SolderMaskMinWidth=0.000000000000 +DrawSegmentWidth=0.200000000000 +BoardOutlineThickness=0.100000000000 +ModuleOutlineThickness=0.150000000000 +[cvpcb] +version=1 +NetIExt=net +[eeschema] +version=1 +LibDir= +[eeschema/libraries] diff --git a/power/adjustable resistor/KiCad project/project.sch b/power/adjustable resistor/KiCad project/project.sch new file mode 100644 index 0000000..ba9c2ca --- /dev/null +++ b/power/adjustable resistor/KiCad project/project.sch @@ -0,0 +1,559 @@ +EESchema Schematic File Version 4 +EELAYER 30 0 +EELAYER END +$Descr A4 11693 8268 +encoding utf-8 +Sheet 1 1 +Title "" +Date "" +Rev "" +Comp "" +Comment1 "" +Comment2 "" +Comment3 "" +Comment4 "" +$EndDescr +$Comp +L Connector:USB_A J1 +U 1 1 5F4101A8 +P 4150 3000 +F 0 "J1" H 4207 3467 50 0000 C CNN +F 1 "USB_A" H 4207 3376 50 0000 C CNN +F 2 "" H 4300 2950 50 0001 C CNN +F 3 " ~" H 4300 2950 50 0001 C CNN + 1 4150 3000 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4450 3100 4550 3100 +Wire Wire Line + 4550 3000 4450 3000 +$Comp +L Switch:SW_SPST SW3 +U 1 1 5F410F20 +P 4750 4400 +F 0 "SW3" H 4750 4635 50 0000 C CNN +F 1 "SW_SPST" H 4750 4544 50 0000 C CNN +F 2 "" H 4750 4400 50 0001 C CNN +F 3 "~" H 4750 4400 50 0001 C CNN + 1 4750 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R2 +U 1 1 5F411557 +P 4750 4650 +F 0 "R2" V 4543 4650 50 0000 C CNN +F 1 "8" V 4634 4650 50 0000 C CNN +F 2 "" V 4680 4650 50 0001 C CNN +F 3 "~" H 4750 4650 50 0001 C CNN + 1 4750 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 4550 4400 4550 4650 +Wire Wire Line + 4550 4650 4600 4650 +$Comp +L Switch:SW_SPST SW6 +U 1 1 5F4130F6 +P 5250 4400 +F 0 "SW6" H 5250 4635 50 0000 C CNN +F 1 "SW_SPST" H 5250 4544 50 0000 C CNN +F 2 "" H 5250 4400 50 0001 C CNN +F 3 "~" H 5250 4400 50 0001 C CNN + 1 5250 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R4 +U 1 1 5F413100 +P 5250 4650 +F 0 "R4" V 5043 4650 50 0000 C CNN +F 1 "4" V 5134 4650 50 0000 C CNN +F 2 "" V 5180 4650 50 0001 C CNN +F 3 "~" H 5250 4650 50 0001 C CNN + 1 5250 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 5000 4650 5100 4650 +Wire Wire Line + 4950 4400 5000 4400 +Wire Wire Line + 5000 4400 5000 4650 +Connection ~ 5000 4400 +Wire Wire Line + 5000 4400 5050 4400 +Wire Wire Line + 4900 4650 5000 4650 +Connection ~ 5000 4650 +$Comp +L Switch:SW_SPST SW9 +U 1 1 5F416C6C +P 5750 4400 +F 0 "SW9" H 5750 4635 50 0000 C CNN +F 1 "SW_SPST" H 5750 4544 50 0000 C CNN +F 2 "" H 5750 4400 50 0001 C CNN +F 3 "~" H 5750 4400 50 0001 C CNN + 1 5750 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R6 +U 1 1 5F416C76 +P 5750 4650 +F 0 "R6" V 5543 4650 50 0000 C CNN +F 1 "2" V 5634 4650 50 0000 C CNN +F 2 "" V 5680 4650 50 0001 C CNN +F 3 "~" H 5750 4650 50 0001 C CNN + 1 5750 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 5500 4650 5600 4650 +Wire Wire Line + 5450 4400 5500 4400 +Wire Wire Line + 5500 4400 5500 4650 +Connection ~ 5500 4400 +Wire Wire Line + 5500 4400 5550 4400 +Wire Wire Line + 5400 4650 5500 4650 +Connection ~ 5500 4650 +$Comp +L Switch:SW_SPST SW12 +U 1 1 5F41B671 +P 6250 4400 +F 0 "SW12" H 6250 4635 50 0000 C CNN +F 1 "SW_SPST" H 6250 4544 50 0000 C CNN +F 2 "" H 6250 4400 50 0001 C CNN +F 3 "~" H 6250 4400 50 0001 C CNN + 1 6250 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R8 +U 1 1 5F41B67B +P 6250 4650 +F 0 "R8" V 6043 4650 50 0000 C CNN +F 1 "1" V 6134 4650 50 0000 C CNN +F 2 "" V 6180 4650 50 0001 C CNN +F 3 "~" H 6250 4650 50 0001 C CNN + 1 6250 4650 + 0 1 1 0 +$EndComp +$Comp +L Switch:SW_SPST SW15 +U 1 1 5F41B686 +P 6750 4400 +F 0 "SW15" H 6750 4635 50 0000 C CNN +F 1 "SW_SPST" H 6750 4544 50 0000 C CNN +F 2 "" H 6750 4400 50 0001 C CNN +F 3 "~" H 6750 4400 50 0001 C CNN + 1 6750 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R11 +U 1 1 5F41B690 +P 6750 4650 +F 0 "R11" V 6543 4650 50 0000 C CNN +F 1 "0.5" V 6634 4650 50 0000 C CNN +F 2 "" V 6680 4650 50 0001 C CNN +F 3 "~" H 6750 4650 50 0001 C CNN + 1 6750 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 6500 4650 6600 4650 +Wire Wire Line + 6450 4400 6500 4400 +Wire Wire Line + 6500 4400 6500 4650 +Connection ~ 6500 4400 +Wire Wire Line + 6500 4400 6550 4400 +Wire Wire Line + 6400 4650 6500 4650 +Connection ~ 6500 4650 +Wire Wire Line + 6950 4400 7000 4400 +Wire Wire Line + 7000 4400 7000 4650 +Wire Wire Line + 6900 4650 7000 4650 +Wire Wire Line + 5900 4650 6000 4650 +Wire Wire Line + 5950 4400 6000 4400 +Wire Wire Line + 6000 4400 6000 4650 +Connection ~ 6000 4400 +Wire Wire Line + 6000 4400 6050 4400 +Connection ~ 6000 4650 +Wire Wire Line + 6000 4650 6100 4650 +$Comp +L Switch:SW_SPST SW2 +U 1 1 5F42FD9A +P 4750 3550 +F 0 "SW2" H 4750 3785 50 0000 C CNN +F 1 "SW_SPST" H 4750 3694 50 0000 C CNN +F 2 "" H 4750 3550 50 0001 C CNN +F 3 "~" H 4750 3550 50 0001 C CNN + 1 4750 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R1 +U 1 1 5F42FDA4 +P 4750 3800 +F 0 "R1" V 4543 3800 50 0000 C CNN +F 1 "256" V 4634 3800 50 0000 C CNN +F 2 "" V 4680 3800 50 0001 C CNN +F 3 "~" H 4750 3800 50 0001 C CNN + 1 4750 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 4550 3550 4550 3800 +Wire Wire Line + 4550 3800 4600 3800 +$Comp +L Switch:SW_SPST SW5 +U 1 1 5F42FDB0 +P 5250 3550 +F 0 "SW5" H 5250 3785 50 0000 C CNN +F 1 "SW_SPST" H 5250 3694 50 0000 C CNN +F 2 "" H 5250 3550 50 0001 C CNN +F 3 "~" H 5250 3550 50 0001 C CNN + 1 5250 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R3 +U 1 1 5F42FDBA +P 5250 3800 +F 0 "R3" V 5043 3800 50 0000 C CNN +F 1 "128" V 5134 3800 50 0000 C CNN +F 2 "" V 5180 3800 50 0001 C CNN +F 3 "~" H 5250 3800 50 0001 C CNN + 1 5250 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 5000 3800 5100 3800 +Wire Wire Line + 4950 3550 5000 3550 +Wire Wire Line + 5000 3550 5000 3800 +Connection ~ 5000 3550 +Wire Wire Line + 5000 3550 5050 3550 +Wire Wire Line + 4900 3800 5000 3800 +Connection ~ 5000 3800 +$Comp +L Switch:SW_SPST SW8 +U 1 1 5F42FDCB +P 5750 3550 +F 0 "SW8" H 5750 3785 50 0000 C CNN +F 1 "SW_SPST" H 5750 3694 50 0000 C CNN +F 2 "" H 5750 3550 50 0001 C CNN +F 3 "~" H 5750 3550 50 0001 C CNN + 1 5750 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R5 +U 1 1 5F42FDD5 +P 5750 3800 +F 0 "R5" V 5543 3800 50 0000 C CNN +F 1 "64" V 5634 3800 50 0000 C CNN +F 2 "" V 5680 3800 50 0001 C CNN +F 3 "~" H 5750 3800 50 0001 C CNN + 1 5750 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 5500 3800 5600 3800 +Wire Wire Line + 5450 3550 5500 3550 +Wire Wire Line + 5500 3550 5500 3800 +Connection ~ 5500 3550 +Wire Wire Line + 5500 3550 5550 3550 +Wire Wire Line + 5400 3800 5500 3800 +Connection ~ 5500 3800 +$Comp +L Switch:SW_SPST SW11 +U 1 1 5F42FDE6 +P 6250 3550 +F 0 "SW11" H 6250 3785 50 0000 C CNN +F 1 "SW_SPST" H 6250 3694 50 0000 C CNN +F 2 "" H 6250 3550 50 0001 C CNN +F 3 "~" H 6250 3550 50 0001 C CNN + 1 6250 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R7 +U 1 1 5F42FDF0 +P 6250 3800 +F 0 "R7" V 6043 3800 50 0000 C CNN +F 1 "32" V 6134 3800 50 0000 C CNN +F 2 "" V 6180 3800 50 0001 C CNN +F 3 "~" H 6250 3800 50 0001 C CNN + 1 6250 3800 + 0 1 1 0 +$EndComp +$Comp +L Switch:SW_SPST SW14 +U 1 1 5F42FDFA +P 6750 3550 +F 0 "SW14" H 6750 3785 50 0000 C CNN +F 1 "SW_SPST" H 6750 3694 50 0000 C CNN +F 2 "" H 6750 3550 50 0001 C CNN +F 3 "~" H 6750 3550 50 0001 C CNN + 1 6750 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R10 +U 1 1 5F42FE04 +P 6750 3800 +F 0 "R10" V 6543 3800 50 0000 C CNN +F 1 "16" V 6634 3800 50 0000 C CNN +F 2 "" V 6680 3800 50 0001 C CNN +F 3 "~" H 6750 3800 50 0001 C CNN + 1 6750 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 6500 3800 6600 3800 +Wire Wire Line + 6450 3550 6500 3550 +Wire Wire Line + 6500 3550 6500 3800 +Connection ~ 6500 3550 +Wire Wire Line + 6500 3550 6550 3550 +Wire Wire Line + 6400 3800 6500 3800 +Connection ~ 6500 3800 +Wire Wire Line + 6950 3550 7000 3550 +Wire Wire Line + 7000 3550 7000 3800 +Wire Wire Line + 6900 3800 7000 3800 +Wire Wire Line + 5900 3800 6000 3800 +Wire Wire Line + 5950 3550 6000 3550 +Wire Wire Line + 6000 3550 6000 3800 +Connection ~ 6000 3550 +Wire Wire Line + 6000 3550 6050 3550 +Connection ~ 6000 3800 +Wire Wire Line + 6000 3800 6100 3800 +$Comp +L Switch:SW_SPST SW1 +U 1 1 5F4459DA +P 4750 2750 +F 0 "SW1" H 4750 2985 50 0000 C CNN +F 1 "SW_SPST" H 4750 2894 50 0000 C CNN +F 2 "" H 4750 2750 50 0001 C CNN +F 3 "~" H 4750 2750 50 0001 C CNN + 1 4750 2750 + 1 0 0 -1 +$EndComp +$Comp +L Switch:SW_SPST SW4 +U 1 1 5F4459F0 +P 5250 2750 +F 0 "SW4" H 5250 2985 50 0000 C CNN +F 1 "SW_SPST" H 5250 2894 50 0000 C CNN +F 2 "" H 5250 2750 50 0001 C CNN +F 3 "~" H 5250 2750 50 0001 C CNN + 1 5250 2750 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4950 2750 5000 2750 +Wire Wire Line + 5000 2750 5000 3000 +Connection ~ 5000 2750 +Wire Wire Line + 5000 2750 5050 2750 +$Comp +L Switch:SW_SPST SW7 +U 1 1 5F445A0B +P 5750 2750 +F 0 "SW7" H 5750 2985 50 0000 C CNN +F 1 "SW_SPST" H 5750 2894 50 0000 C CNN +F 2 "" H 5750 2750 50 0001 C CNN +F 3 "~" H 5750 2750 50 0001 C CNN + 1 5750 2750 + 1 0 0 -1 +$EndComp +Wire Wire Line + 5450 2750 5500 2750 +Wire Wire Line + 5500 2750 5500 3000 +Connection ~ 5500 2750 +Wire Wire Line + 5500 2750 5550 2750 +$Comp +L Switch:SW_SPST SW10 +U 1 1 5F445A26 +P 6250 2750 +F 0 "SW10" H 6250 2985 50 0000 C CNN +F 1 "SW_SPST" H 6250 2894 50 0000 C CNN +F 2 "" H 6250 2750 50 0001 C CNN +F 3 "~" H 6250 2750 50 0001 C CNN + 1 6250 2750 + 1 0 0 -1 +$EndComp +$Comp +L Switch:SW_SPST SW13 +U 1 1 5F445A3A +P 6750 2750 +F 0 "SW13" H 6750 2985 50 0000 C CNN +F 1 "SW_SPST" H 6750 2894 50 0000 C CNN +F 2 "" H 6750 2750 50 0001 C CNN +F 3 "~" H 6750 2750 50 0001 C CNN + 1 6750 2750 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R9 +U 1 1 5F445A44 +P 6750 3000 +F 0 "R9" V 6543 3000 50 0000 C CNN +F 1 "512" V 6634 3000 50 0000 C CNN +F 2 "" V 6680 3000 50 0001 C CNN +F 3 "~" H 6750 3000 50 0001 C CNN + 1 6750 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 6500 3000 6600 3000 +Wire Wire Line + 6450 2750 6500 2750 +Wire Wire Line + 6500 2750 6500 3000 +Connection ~ 6500 2750 +Wire Wire Line + 6500 2750 6550 2750 +Wire Wire Line + 6950 2750 7000 2750 +Wire Wire Line + 7000 2750 7000 3000 +Wire Wire Line + 6900 3000 7000 3000 +Wire Wire Line + 5950 2750 6000 2750 +Wire Wire Line + 6000 2750 6000 3000 +Connection ~ 6000 2750 +Wire Wire Line + 6000 2750 6050 2750 +$Comp +L Device:Lamp LA4 +U 1 1 5F459AA3 +P 6250 3000 +F 0 "LA4" V 5985 3000 50 0000 C CNN +F 1 "Lamp" V 6076 3000 50 0000 C CNN +F 2 "" V 6250 3100 50 0001 C CNN +F 3 "~" V 6250 3100 50 0001 C CNN + 1 6250 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 6450 3000 6500 3000 +Connection ~ 6500 3000 +Wire Wire Line + 6050 3000 6000 3000 +$Comp +L Device:Lamp LA3 +U 1 1 5F48104F +P 5750 3000 +F 0 "LA3" V 5485 3000 50 0000 C CNN +F 1 "Lamp" V 5576 3000 50 0000 C CNN +F 2 "" V 5750 3100 50 0001 C CNN +F 3 "~" V 5750 3100 50 0001 C CNN + 1 5750 3000 + 0 1 1 0 +$EndComp +$Comp +L Device:Lamp LA2 +U 1 1 5F4819AC +P 5250 3000 +F 0 "LA2" V 4985 3000 50 0000 C CNN +F 1 "Lamp" V 5076 3000 50 0000 C CNN +F 2 "" V 5250 3100 50 0001 C CNN +F 3 "~" V 5250 3100 50 0001 C CNN + 1 5250 3000 + 0 1 1 0 +$EndComp +$Comp +L Device:Lamp LA1 +U 1 1 5F482195 +P 4750 3000 +F 0 "LA1" V 4485 3000 50 0000 C CNN +F 1 "Lamp" V 4576 3000 50 0000 C CNN +F 2 "" V 4750 3100 50 0001 C CNN +F 3 "~" V 4750 3100 50 0001 C CNN + 1 4750 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 4950 3000 5000 3000 +Wire Wire Line + 5000 3000 5050 3000 +Connection ~ 5000 3000 +Wire Wire Line + 5450 3000 5500 3000 +Wire Wire Line + 5500 3000 5550 3000 +Connection ~ 5500 3000 +Wire Wire Line + 5950 3000 6000 3000 +Connection ~ 6000 3000 +Wire Wire Line + 4550 4400 4550 4000 +Wire Wire Line + 4550 4000 7000 4000 +Wire Wire Line + 7000 4000 7000 3800 +Connection ~ 4550 4400 +Connection ~ 7000 3800 +Wire Wire Line + 4550 3550 4550 3200 +Wire Wire Line + 4550 3200 7000 3200 +Wire Wire Line + 7000 3200 7000 3000 +Connection ~ 4550 3550 +Connection ~ 7000 3000 +Wire Wire Line + 4550 3100 4550 3000 +Wire Wire Line + 4550 3000 4550 2750 +Wire Wire Line + 7000 4900 7000 4650 +Connection ~ 7000 4650 +Connection ~ 4550 3000 +Wire Wire Line + 7000 4900 4050 4900 +Wire Wire Line + 4050 4900 4050 3400 +$EndSCHEMATC diff --git a/power/adjustable resistor/KiCad project/project.sch-bak b/power/adjustable resistor/KiCad project/project.sch-bak new file mode 100644 index 0000000..8a080e3 --- /dev/null +++ b/power/adjustable resistor/KiCad project/project.sch-bak @@ -0,0 +1,564 @@ +EESchema Schematic File Version 4 +EELAYER 30 0 +EELAYER END +$Descr A4 11693 8268 +encoding utf-8 +Sheet 1 1 +Title "" +Date "" +Rev "" +Comp "" +Comment1 "" +Comment2 "" +Comment3 "" +Comment4 "" +$EndDescr +$Comp +L Connector:USB_A J1 +U 1 1 5F4101A8 +P 3850 3350 +F 0 "J1" H 3907 3817 50 0000 C CNN +F 1 "USB_A" H 3907 3726 50 0000 C CNN +F 2 "" H 4000 3300 50 0001 C CNN +F 3 " ~" H 4000 3300 50 0001 C CNN + 1 3850 3350 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4150 3450 4250 3450 +Wire Wire Line + 4250 3350 4150 3350 +$Comp +L Switch:SW_SPST SW3 +U 1 1 5F410F20 +P 4750 4400 +F 0 "SW3" H 4750 4635 50 0000 C CNN +F 1 "SW_SPST" H 4750 4544 50 0000 C CNN +F 2 "" H 4750 4400 50 0001 C CNN +F 3 "~" H 4750 4400 50 0001 C CNN + 1 4750 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R2 +U 1 1 5F411557 +P 4750 4650 +F 0 "R2" V 4543 4650 50 0000 C CNN +F 1 "8" V 4634 4650 50 0000 C CNN +F 2 "" V 4680 4650 50 0001 C CNN +F 3 "~" H 4750 4650 50 0001 C CNN + 1 4750 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 4550 4400 4550 4650 +Wire Wire Line + 4550 4650 4600 4650 +$Comp +L Switch:SW_SPST SW6 +U 1 1 5F4130F6 +P 5250 4400 +F 0 "SW6" H 5250 4635 50 0000 C CNN +F 1 "SW_SPST" H 5250 4544 50 0000 C CNN +F 2 "" H 5250 4400 50 0001 C CNN +F 3 "~" H 5250 4400 50 0001 C CNN + 1 5250 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R4 +U 1 1 5F413100 +P 5250 4650 +F 0 "R4" V 5043 4650 50 0000 C CNN +F 1 "4" V 5134 4650 50 0000 C CNN +F 2 "" V 5180 4650 50 0001 C CNN +F 3 "~" H 5250 4650 50 0001 C CNN + 1 5250 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 5000 4650 5100 4650 +Wire Wire Line + 4950 4400 5000 4400 +Wire Wire Line + 5000 4400 5000 4650 +Connection ~ 5000 4400 +Wire Wire Line + 5000 4400 5050 4400 +Wire Wire Line + 4900 4650 5000 4650 +Connection ~ 5000 4650 +$Comp +L Switch:SW_SPST SW9 +U 1 1 5F416C6C +P 5750 4400 +F 0 "SW9" H 5750 4635 50 0000 C CNN +F 1 "SW_SPST" H 5750 4544 50 0000 C CNN +F 2 "" H 5750 4400 50 0001 C CNN +F 3 "~" H 5750 4400 50 0001 C CNN + 1 5750 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R6 +U 1 1 5F416C76 +P 5750 4650 +F 0 "R6" V 5543 4650 50 0000 C CNN +F 1 "2" V 5634 4650 50 0000 C CNN +F 2 "" V 5680 4650 50 0001 C CNN +F 3 "~" H 5750 4650 50 0001 C CNN + 1 5750 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 5500 4650 5600 4650 +Wire Wire Line + 5450 4400 5500 4400 +Wire Wire Line + 5500 4400 5500 4650 +Connection ~ 5500 4400 +Wire Wire Line + 5500 4400 5550 4400 +Wire Wire Line + 5400 4650 5500 4650 +Connection ~ 5500 4650 +$Comp +L Switch:SW_SPST SW12 +U 1 1 5F41B671 +P 6250 4400 +F 0 "SW12" H 6250 4635 50 0000 C CNN +F 1 "SW_SPST" H 6250 4544 50 0000 C CNN +F 2 "" H 6250 4400 50 0001 C CNN +F 3 "~" H 6250 4400 50 0001 C CNN + 1 6250 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R8 +U 1 1 5F41B67B +P 6250 4650 +F 0 "R8" V 6043 4650 50 0000 C CNN +F 1 "1" V 6134 4650 50 0000 C CNN +F 2 "" V 6180 4650 50 0001 C CNN +F 3 "~" H 6250 4650 50 0001 C CNN + 1 6250 4650 + 0 1 1 0 +$EndComp +$Comp +L Switch:SW_SPST SW15 +U 1 1 5F41B686 +P 6750 4400 +F 0 "SW15" H 6750 4635 50 0000 C CNN +F 1 "SW_SPST" H 6750 4544 50 0000 C CNN +F 2 "" H 6750 4400 50 0001 C CNN +F 3 "~" H 6750 4400 50 0001 C CNN + 1 6750 4400 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R11 +U 1 1 5F41B690 +P 6750 4650 +F 0 "R11" V 6543 4650 50 0000 C CNN +F 1 "0.5" V 6634 4650 50 0000 C CNN +F 2 "" V 6680 4650 50 0001 C CNN +F 3 "~" H 6750 4650 50 0001 C CNN + 1 6750 4650 + 0 1 1 0 +$EndComp +Wire Wire Line + 6500 4650 6600 4650 +Wire Wire Line + 6450 4400 6500 4400 +Wire Wire Line + 6500 4400 6500 4650 +Connection ~ 6500 4400 +Wire Wire Line + 6500 4400 6550 4400 +Wire Wire Line + 6400 4650 6500 4650 +Connection ~ 6500 4650 +Wire Wire Line + 6950 4400 7000 4400 +Wire Wire Line + 7000 4400 7000 4650 +Wire Wire Line + 6900 4650 7000 4650 +Wire Wire Line + 5900 4650 6000 4650 +Wire Wire Line + 5950 4400 6000 4400 +Wire Wire Line + 6000 4400 6000 4650 +Connection ~ 6000 4400 +Wire Wire Line + 6000 4400 6050 4400 +Connection ~ 6000 4650 +Wire Wire Line + 6000 4650 6100 4650 +$Comp +L Switch:SW_SPST SW2 +U 1 1 5F42FD9A +P 4750 3550 +F 0 "SW2" H 4750 3785 50 0000 C CNN +F 1 "SW_SPST" H 4750 3694 50 0000 C CNN +F 2 "" H 4750 3550 50 0001 C CNN +F 3 "~" H 4750 3550 50 0001 C CNN + 1 4750 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R1 +U 1 1 5F42FDA4 +P 4750 3800 +F 0 "R1" V 4543 3800 50 0000 C CNN +F 1 "256" V 4634 3800 50 0000 C CNN +F 2 "" V 4680 3800 50 0001 C CNN +F 3 "~" H 4750 3800 50 0001 C CNN + 1 4750 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 4550 3550 4550 3800 +Wire Wire Line + 4550 3800 4600 3800 +$Comp +L Switch:SW_SPST SW5 +U 1 1 5F42FDB0 +P 5250 3550 +F 0 "SW5" H 5250 3785 50 0000 C CNN +F 1 "SW_SPST" H 5250 3694 50 0000 C CNN +F 2 "" H 5250 3550 50 0001 C CNN +F 3 "~" H 5250 3550 50 0001 C CNN + 1 5250 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R3 +U 1 1 5F42FDBA +P 5250 3800 +F 0 "R3" V 5043 3800 50 0000 C CNN +F 1 "128" V 5134 3800 50 0000 C CNN +F 2 "" V 5180 3800 50 0001 C CNN +F 3 "~" H 5250 3800 50 0001 C CNN + 1 5250 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 5000 3800 5100 3800 +Wire Wire Line + 4950 3550 5000 3550 +Wire Wire Line + 5000 3550 5000 3800 +Connection ~ 5000 3550 +Wire Wire Line + 5000 3550 5050 3550 +Wire Wire Line + 4900 3800 5000 3800 +Connection ~ 5000 3800 +$Comp +L Switch:SW_SPST SW8 +U 1 1 5F42FDCB +P 5750 3550 +F 0 "SW8" H 5750 3785 50 0000 C CNN +F 1 "SW_SPST" H 5750 3694 50 0000 C CNN +F 2 "" H 5750 3550 50 0001 C CNN +F 3 "~" H 5750 3550 50 0001 C CNN + 1 5750 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R5 +U 1 1 5F42FDD5 +P 5750 3800 +F 0 "R5" V 5543 3800 50 0000 C CNN +F 1 "64" V 5634 3800 50 0000 C CNN +F 2 "" V 5680 3800 50 0001 C CNN +F 3 "~" H 5750 3800 50 0001 C CNN + 1 5750 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 5500 3800 5600 3800 +Wire Wire Line + 5450 3550 5500 3550 +Wire Wire Line + 5500 3550 5500 3800 +Connection ~ 5500 3550 +Wire Wire Line + 5500 3550 5550 3550 +Wire Wire Line + 5400 3800 5500 3800 +Connection ~ 5500 3800 +$Comp +L Switch:SW_SPST SW11 +U 1 1 5F42FDE6 +P 6250 3550 +F 0 "SW11" H 6250 3785 50 0000 C CNN +F 1 "SW_SPST" H 6250 3694 50 0000 C CNN +F 2 "" H 6250 3550 50 0001 C CNN +F 3 "~" H 6250 3550 50 0001 C CNN + 1 6250 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R7 +U 1 1 5F42FDF0 +P 6250 3800 +F 0 "R7" V 6043 3800 50 0000 C CNN +F 1 "32" V 6134 3800 50 0000 C CNN +F 2 "" V 6180 3800 50 0001 C CNN +F 3 "~" H 6250 3800 50 0001 C CNN + 1 6250 3800 + 0 1 1 0 +$EndComp +$Comp +L Switch:SW_SPST SW14 +U 1 1 5F42FDFA +P 6750 3550 +F 0 "SW14" H 6750 3785 50 0000 C CNN +F 1 "SW_SPST" H 6750 3694 50 0000 C CNN +F 2 "" H 6750 3550 50 0001 C CNN +F 3 "~" H 6750 3550 50 0001 C CNN + 1 6750 3550 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R10 +U 1 1 5F42FE04 +P 6750 3800 +F 0 "R10" V 6543 3800 50 0000 C CNN +F 1 "16" V 6634 3800 50 0000 C CNN +F 2 "" V 6680 3800 50 0001 C CNN +F 3 "~" H 6750 3800 50 0001 C CNN + 1 6750 3800 + 0 1 1 0 +$EndComp +Wire Wire Line + 6500 3800 6600 3800 +Wire Wire Line + 6450 3550 6500 3550 +Wire Wire Line + 6500 3550 6500 3800 +Connection ~ 6500 3550 +Wire Wire Line + 6500 3550 6550 3550 +Wire Wire Line + 6400 3800 6500 3800 +Connection ~ 6500 3800 +Wire Wire Line + 6950 3550 7000 3550 +Wire Wire Line + 7000 3550 7000 3800 +Wire Wire Line + 6900 3800 7000 3800 +Wire Wire Line + 5900 3800 6000 3800 +Wire Wire Line + 5950 3550 6000 3550 +Wire Wire Line + 6000 3550 6000 3800 +Connection ~ 6000 3550 +Wire Wire Line + 6000 3550 6050 3550 +Connection ~ 6000 3800 +Wire Wire Line + 6000 3800 6100 3800 +$Comp +L Switch:SW_SPST SW1 +U 1 1 5F4459DA +P 4750 2750 +F 0 "SW1" H 4750 2985 50 0000 C CNN +F 1 "SW_SPST" H 4750 2894 50 0000 C CNN +F 2 "" H 4750 2750 50 0001 C CNN +F 3 "~" H 4750 2750 50 0001 C CNN + 1 4750 2750 + 1 0 0 -1 +$EndComp +$Comp +L Switch:SW_SPST SW4 +U 1 1 5F4459F0 +P 5250 2750 +F 0 "SW4" H 5250 2985 50 0000 C CNN +F 1 "SW_SPST" H 5250 2894 50 0000 C CNN +F 2 "" H 5250 2750 50 0001 C CNN +F 3 "~" H 5250 2750 50 0001 C CNN + 1 5250 2750 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4950 2750 5000 2750 +Wire Wire Line + 5000 2750 5000 3000 +Connection ~ 5000 2750 +Wire Wire Line + 5000 2750 5050 2750 +$Comp +L Switch:SW_SPST SW7 +U 1 1 5F445A0B +P 5750 2750 +F 0 "SW7" H 5750 2985 50 0000 C CNN +F 1 "SW_SPST" H 5750 2894 50 0000 C CNN +F 2 "" H 5750 2750 50 0001 C CNN +F 3 "~" H 5750 2750 50 0001 C CNN + 1 5750 2750 + 1 0 0 -1 +$EndComp +Wire Wire Line + 5450 2750 5500 2750 +Wire Wire Line + 5500 2750 5500 3000 +Connection ~ 5500 2750 +Wire Wire Line + 5500 2750 5550 2750 +$Comp +L Switch:SW_SPST SW10 +U 1 1 5F445A26 +P 6250 2750 +F 0 "SW10" H 6250 2985 50 0000 C CNN +F 1 "SW_SPST" H 6250 2894 50 0000 C CNN +F 2 "" H 6250 2750 50 0001 C CNN +F 3 "~" H 6250 2750 50 0001 C CNN + 1 6250 2750 + 1 0 0 -1 +$EndComp +$Comp +L Switch:SW_SPST SW13 +U 1 1 5F445A3A +P 6750 2750 +F 0 "SW13" H 6750 2985 50 0000 C CNN +F 1 "SW_SPST" H 6750 2894 50 0000 C CNN +F 2 "" H 6750 2750 50 0001 C CNN +F 3 "~" H 6750 2750 50 0001 C CNN + 1 6750 2750 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R9 +U 1 1 5F445A44 +P 6750 3000 +F 0 "R9" V 6543 3000 50 0000 C CNN +F 1 "512" V 6634 3000 50 0000 C CNN +F 2 "" V 6680 3000 50 0001 C CNN +F 3 "~" H 6750 3000 50 0001 C CNN + 1 6750 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 6500 3000 6600 3000 +Wire Wire Line + 6450 2750 6500 2750 +Wire Wire Line + 6500 2750 6500 3000 +Connection ~ 6500 2750 +Wire Wire Line + 6500 2750 6550 2750 +Wire Wire Line + 6950 2750 7000 2750 +Wire Wire Line + 7000 2750 7000 3000 +Wire Wire Line + 6900 3000 7000 3000 +Wire Wire Line + 5950 2750 6000 2750 +Wire Wire Line + 6000 2750 6000 3000 +Connection ~ 6000 2750 +Wire Wire Line + 6000 2750 6050 2750 +$Comp +L Device:Lamp LA4 +U 1 1 5F459AA3 +P 6250 3000 +F 0 "LA4" V 5985 3000 50 0000 C CNN +F 1 "Lamp" V 6076 3000 50 0000 C CNN +F 2 "" V 6250 3100 50 0001 C CNN +F 3 "~" V 6250 3100 50 0001 C CNN + 1 6250 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 6450 3000 6500 3000 +Connection ~ 6500 3000 +Wire Wire Line + 6050 3000 6000 3000 +$Comp +L Device:Lamp LA3 +U 1 1 5F48104F +P 5750 3000 +F 0 "LA3" V 5485 3000 50 0000 C CNN +F 1 "Lamp" V 5576 3000 50 0000 C CNN +F 2 "" V 5750 3100 50 0001 C CNN +F 3 "~" V 5750 3100 50 0001 C CNN + 1 5750 3000 + 0 1 1 0 +$EndComp +$Comp +L Device:Lamp LA2 +U 1 1 5F4819AC +P 5250 3000 +F 0 "LA2" V 4985 3000 50 0000 C CNN +F 1 "Lamp" V 5076 3000 50 0000 C CNN +F 2 "" V 5250 3100 50 0001 C CNN +F 3 "~" V 5250 3100 50 0001 C CNN + 1 5250 3000 + 0 1 1 0 +$EndComp +$Comp +L Device:Lamp LA1 +U 1 1 5F482195 +P 4750 3000 +F 0 "LA1" V 4485 3000 50 0000 C CNN +F 1 "Lamp" V 4576 3000 50 0000 C CNN +F 2 "" V 4750 3100 50 0001 C CNN +F 3 "~" V 4750 3100 50 0001 C CNN + 1 4750 3000 + 0 1 1 0 +$EndComp +Wire Wire Line + 4950 3000 5000 3000 +Wire Wire Line + 5000 3000 5050 3000 +Connection ~ 5000 3000 +Wire Wire Line + 5450 3000 5500 3000 +Wire Wire Line + 5500 3000 5550 3000 +Connection ~ 5500 3000 +Wire Wire Line + 5950 3000 6000 3000 +Connection ~ 6000 3000 +Wire Wire Line + 4550 4400 4550 4000 +Wire Wire Line + 4550 4000 7000 4000 +Wire Wire Line + 7000 4000 7000 3800 +Connection ~ 4550 4400 +Connection ~ 7000 3800 +Wire Wire Line + 4550 3550 4550 3200 +Wire Wire Line + 4550 3200 7000 3200 +Wire Wire Line + 7000 3200 7000 3000 +Connection ~ 4550 3550 +Connection ~ 7000 3000 +Wire Wire Line + 4250 3450 4250 3350 +Wire Wire Line + 4250 3350 4250 3000 +Wire Wire Line + 4250 3000 4550 3000 +Connection ~ 4250 3350 +Wire Wire Line + 4550 3000 4550 2750 +Connection ~ 4550 3000 +Wire Wire Line + 3750 3750 3750 4900 +Wire Wire Line + 3750 4900 7000 4900 +Wire Wire Line + 7000 4900 7000 4650 +Connection ~ 7000 4650 +$EndSCHEMATC diff --git a/power/adjustable resistor/back cover.png b/power/adjustable resistor/back cover.png new file mode 100644 index 0000000..05416df Binary files /dev/null and b/power/adjustable resistor/back cover.png differ diff --git a/power/adjustable resistor/back cover.stl b/power/adjustable resistor/back cover.stl new file mode 100644 index 0000000..ebc1663 Binary files /dev/null and b/power/adjustable resistor/back cover.stl differ diff --git a/power/adjustable resistor/body and back cover.FCStd b/power/adjustable resistor/body and back cover.FCStd new file mode 100644 index 0000000..3d5d1ba Binary files /dev/null and b/power/adjustable resistor/body and back cover.FCStd differ diff --git a/power/adjustable resistor/body.FCStd b/power/adjustable resistor/body.FCStd deleted file mode 100644 index fce50d6..0000000 Binary files a/power/adjustable resistor/body.FCStd and /dev/null differ diff --git a/power/adjustable resistor/button.FCStd b/power/adjustable resistor/button.FCStd new file mode 100644 index 0000000..f03f49c Binary files /dev/null and b/power/adjustable resistor/button.FCStd differ diff --git a/power/adjustable resistor/button.png b/power/adjustable resistor/button.png new file mode 100644 index 0000000..b8eaa66 Binary files /dev/null and b/power/adjustable resistor/button.png differ diff --git a/power/adjustable resistor/button.stl b/power/adjustable resistor/button.stl new file mode 100644 index 0000000..ce6645e Binary files /dev/null and b/power/adjustable resistor/button.stl differ diff --git a/power/adjustable resistor/index.html b/power/adjustable resistor/index.html new file mode 100644 index 0000000..2ab6a34 --- /dev/null +++ b/power/adjustable resistor/index.html @@ -0,0 +1,371 @@ + + + +Adjustable resistor / indicator + + + + + + + + + + + + + +

+

Adjustable resistor / indicator

+ +

+

1 General

+

+

DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE +COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE +DESIGNS AT YOUR OWN RISK. +
This design is released under Creative Commons Zero (CC0) license. +
Author: +
- Svjatoslav Agejenko +
  - Homepage: https://svjatoslav.eu +
  - Email: svjatoslav@svjatoslav.eu +
  +
+
See also: +
- Other physical projects in this repository +
- Other projects hosted at svjatoslav.eu +
+

+

+

+ +

+

2 Project description

+

+

+I needed a way to experimentally find resistance that works best in +certain circuits. Usual potentiometers could not handle required power +dissipation and were not precise enough. +

+ +

+Solution is to build adjustable resistor: +

+ + +

+ +

+Logically there is series of resistors that increase in resistance in +the power of 2: 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. Each +resistor can be enabled or disabled by a switch. This makes entire +range of 0 – 1023.5 ohms available with the 0.5 ohms precision. +

+ +

+Schematic: + +

+ +

+Here is front panel for switches: + front%20panel.png +

+ +

+Download: +

+

FreeCAD project +
STL file +

+ +

+Sometimes I would like to use lightbulbs with various parameters as +test load/indicator. Current device has 4 of them included. +

+ +

+Here is front panel for light bulbs: + indicator%20panel.png +

+ +

+Download: +

+

FreeCAD project +
STL file +

+ + +

+After assembly using prototype PCB: + make,%202.png +

+ + +

+Following body is used as a case and PCB support: + +

+ +

+Download: +

+

FreeCAD project (body + back cover) +
STL file for body +

+ +

+Result: + make,%203.png +

+ +

+Cover on the back: + back%20cover.png +

+ +

+Download: STL file +

+ +

+Button covers: + +

+ +

+Download: +

+

FreeCAD project +
STL file +

+

+

+

+

+ + + diff --git a/power/adjustable resistor/index.org b/power/adjustable resistor/index.org new file mode 100644 index 0000000..f86a7d6 --- /dev/null +++ b/power/adjustable resistor/index.org @@ -0,0 +1,90 @@ +#+TITLE: Adjustable resistor / indicator +#+AUTHOR: Svjatoslav Agejenko +#+LANGUAGE: en + +* (document settings) :noexport: +** use dark style for TWBS-HTML exporter +#+HTML_HEAD: +#+HTML_HEAD: +#+HTML_HEAD: +#+HTML_HEAD: + +* General ++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE + COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE + DESIGNS AT YOUR OWN RISK. + ++ This design is released under Creative Commons Zero (CC0) license. + ++ Author: + - Svjatoslav Agejenko + - Homepage: https://svjatoslav.eu + - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]] + ++ See also: + - [[../../index.html][Other physical projects in this repository]] + - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]] + +* Project description +I needed a way to experimentally find resistance that works best in +certain circuits. Usual potentiometers could not handle required power +dissipation and were not precise enough. + +Solution is to build adjustable resistor: + +[[file:make.png]] + +Logically there is series of resistors that increase in resistance in +the power of 2: 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. Each +resistor can be enabled or disabled by a switch. This makes entire +range of 0 -- 1023.5 ohms available with the 0.5 ohms precision. + +Schematic: +[[file:schematic.png]] + +Here is front panel for switches: +[[file:front%20panel.png]] + +Download: ++ [[file:front%20panel.FCStd][FreeCAD project]] ++ [[file:front%20panel.stl][STL file]] + +Sometimes I would like to use lightbulbs with various parameters as +test load/indicator. Current device has 4 of them included. + +Here is front panel for light bulbs: +[[file:indicator%20panel.png]] + +Download: ++ [[file:indicator%20panel.FCStd][FreeCAD project]] ++ [[file:indicator%20panel.stl][STL file]] + + +After assembly using prototype PCB: +[[file:make,%202.png]] + + +Following body is used as a case and PCB support: +[[file:body.png]] + +Download: ++ [[file:body%20and%20back%20cover.FCStd][FreeCAD project (body + back cover)]] ++ [[file:body.stl][STL file for body]] + +Result: +[[file:make,%203.png]] + +Cover on the back: +[[file:back%20cover.png]] + +Download: [[file:back%20cover.stl][STL file]] + +Button covers: +[[file:button.png]] + +Download: ++ [[file:button.FCStd][FreeCAD project]] ++ [[file:button.stl][STL file]] diff --git a/power/adjustable resistor/make.png b/power/adjustable resistor/make.png new file mode 100644 index 0000000..1670f21 Binary files /dev/null and b/power/adjustable resistor/make.png differ diff --git a/power/adjustable resistor/schematic.png b/power/adjustable resistor/schematic.png new file mode 100644 index 0000000..48b7226 Binary files /dev/null and b/power/adjustable resistor/schematic.png differ diff --git a/power/alternative USB layout/make.png b/power/alternative USB layout/make.png new file mode 100644 index 0000000..9b3d865 Binary files /dev/null and b/power/alternative USB layout/make.png differ