CH341A programmer page

en/hardware-programmer-ch341a-voltage-fix.md

@@ -0,0 +1,31 @@
+# OpenIPC Wiki
+[Table of Content](../index.md)
+
+CH341A Programmer
+-----------------
+
+### Fixing high voltage bug
+
+Early versions, prior ver. 1.7, of the cheap and popular CH341A Mini Programmer
+have a nasty bug where voltage levels on data lines remain at 5V despite the
+programmer being set to 3.3V with the jumper.
+
+@ddemos1963 came out with an interesting hack to fix the issue in an efficient
+and artsy way.
+
+![](../images/hardware-ch341a-hack-1.webp)
+
+Sever the connection between between 5V power line and the CH341A chip.
+With a sharp utility knife, cut the trace on the back of the programmer board.
+
+![](../images/hardware-ch341a-hack-3.webp)
+
+Connect 3.3v output leg of the voltage regulator to pin 9 of CH341A IC bridging
+it to a corresponding trace at a nerby capacitor.
+
+![](../images/hardware-ch341a-hack-4.webp)
+
+Restore power to the chip re-routing 3.3V voltage from 3v3 pin to pin 28
+of CH341A IC through 5V pin connector on the header.
+
+![](../images/hardware-ch341a-hack-5.webp)

index.md

@@ -53,6 +53,9 @@ OpenIPC Wiki
 - [Releases in Telegram](https://t.me/s/openipc_dev)
 - [Source code](en/source-code.md)
 
+### Equipment
+- [CH341A programmer](en/hardware-programmer-ch341a-voltage-fix.md)
+
 ### Development
 - [Boot device with NFS](en/dev-nfs-boot.md)
 - [FFMPEG usage](en/dev-ffmpeg-usage.md)