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--- power_supply [2006/11/28 20:40] – herman
+++ power_supply [2018/12/30 00:13] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+Build my own 'lab' power supply from an old ATX pc version.\\
+Basic idea is to strip all the wires and add plugs to the case to plug in banana wires.
+[[http://www.wd5gnr.com/power.htm|Original idea]]
+[[http://pinouts.ru/Power/atxpower_pinout.shtml|ATX Pinout]]
+[[http://glory.honour.ca/projects/Oscilloscope/Oscilloscope.html|ATX example]], found by searching google images for 'atx power supply'.
+====== Plan ======
+  - How is ground connected? (done)
+    * 3,5,7,13,15,16,17 all interconnected or separate?
+      * How should this stuff work?
+      * All interconnected and to ground (metal case), easy and logical!
+  - Test voltage on different pins. (done)
+    * +3,3 v: 1, 2 and 11
+    * +5 v: 4, 6, 19 and 20
+    * -5 v: 18
+    * +12 v: 10
+    * -12 v: 12
+    * +5 v standby (max 10mA): 9
+  - Design case and wiring layout (done)
+    * Switch
+    * Wire terminals
+  - Think of ways to connect to existing projects. (done)
+    * TTY level converter (done)
+    * MSNTV (done)
+  - Purchase/scavenge parts (done)
+    * Switch (skipped)
+    * Terminals (bought)
+    * Rubber feet (bought)
+  - Build using bought/scavenged parts. (done)
+    * Cut holes in case (done)
+    * Attach terminals and such (done)
+    * Shorten wires (done)
+  - Profit!
+  - Optional
+    * Make power supply silent by using fan control
+      * temperature based or manual :)
+Version 1.0 is done!\\
+It has 8 'banana' plugs, +3,3v +5v, -5v, +12v and -12v.
+The negative voltages are not precise and differ quite a bit... Not really a problem :)
+{{:powersupply.jpg?400|Power supply}}