Obviously I've got a little catch up to do in documentation.

I have a serious LCD-buying problem. If I see a new inexpensive LCD on AliExpress, I tend to snap it up. They very rarely have good documentation, or any information at all.

Most of them don't even have part numbers.

After researching part numbers written on the LCDs (but nowhere in the original seller's page), it usually seems to first come up in Russian-language forums. They have a good history of finding old half-finished datasheets that have "PRELIMINARY" and "INTERNAL USE ONLY" written all over them. Very handy.

So here's the schematic I did for "Revision 1". That's the version that got made.

It's pretty simple. USB connector, linear 3.3v regulator, a cheap Chinese CH340G USB-UART bridge, ESP-12E module, and a serial-parallel shift register.

The UART bridge programs the ESP8266, the shift register is to handle the parallel inputs of the LCD module itself.

There are definitely some things I don't like about it already, but that's what a prototype is for!

I'll detail some of them in the next log.