X-Git-Url: http://www2.svjatoslav.eu/gitweb/?p=physical.git;a=blobdiff_plain;f=misc%2F12V%20Lead-Acid%20battery%20changer%20and%20terminal%2Findex.org;fp=misc%2F12V%20Lead-Acid%20battery%20changer%20and%20terminal%2Findex.org;h=d14cca22c4bc7280e965b7ee95ce037e280dcf77;hp=36baa7fabd7d5435ca096802e2605a5d1766c163;hb=7b9f5c290553f6d5a7a157ceb150ed82c45815bb;hpb=1e311a3bb210706339c8a09fe788a636c15f78cd diff --git a/misc/12V Lead-Acid battery changer and terminal/index.org b/misc/12V Lead-Acid battery changer and terminal/index.org index 36baa7f..d14cca2 100644 --- a/misc/12V Lead-Acid battery changer and terminal/index.org +++ b/misc/12V Lead-Acid battery changer and terminal/index.org @@ -32,31 +32,32 @@ * Project description I needed dual voltage power supply for my lab that runs on mains -electricity (wall power) and slowly charges attached 12V Lead-Acid -battery. Lead-acid battery in turn provides high current when needed -as well as power in portable situations or when mains electricity is -not available. +electricity (wall power) and slowly charges (use-changing) attached +12V Lead-Acid battery. Lead-acid battery in turn provides high current +when needed as well as power in portable situations or when mains +electricity is not available. [[file:make.png]] Power supply provides about 13 Volts and 5 Volts simultaneously. -!!!WARNING!!! I use USB-A connectors for power output, but IT IS NOT -COMPATIBLE WITH USB DEVICES AND POSSIBLY WITH EXISTING USB CABLES. +*!!!WARNING!!!* [[../alternative%20USB%20layout/][Alternative and incompatible USB wiring/layout]] is +being used here. -Normal USB devices and cables should not be plugged in! It would -damage device/cable and likely power supply. +*Normal USB devices and cables should not be plugged in! It would +damage device/cable and likely power supply.* I found USB-A connectors to be easily available, cheap, reliable and functional, so I re-purposed connector for my own needs but I'm using totally incompatible electrical wiring. -[[file:connector%20terminal/USB%20hack.png]] +[[file:../alternative%20USB%20layout/schematic.png]] As seen, it has dual voltage output. Additionally one wire is -dedicated to data transmission and can be used with [[https://en.wikipedia.org/wiki/1-Wire][1-wire]] -protocol. Power supply simply passively links all data wires together -but does not participate in communication. +dedicated to data transmission and can be used with [[https://en.wikipedia.org/wiki/1-Wire][1-Wire]] protocol + +1-Wire data router/hub is really simple. Power supply simply passively +links all data wires together. Power supply uses 3D printed body with lots of holes, for fanless cooling.