So I'm up at our cottage for this week and have got back to looking at my design for a replacement DIY PCB for this; I've decided (at least for the first effort) that all I will do is produce a PCB that is a fit and function replacement for the 2.1S (see picture in previous post) but I will try to make improvements where possible but I'm trying to design in parts that we can actually buy from suppliers such as Digikey and Mouser. So, here's a list of questions that I'm seeking input on:
1. Is the attached FloobyDust pdf the correct schematic for 2.1S?
2. What are the connector part numbers for the 2 pin power and battery headers?
3. The only OLED I can find that looks like the one on my PCB is
this one from Banggood but it appears to have GND and VCC reversed so I've included a resistor patch (my R1) that allows the pins to be reversed. Can anyone point to a different OLED or is this one OK?
4. I know the KSGER PCB has unpopulated desoldering pump components but do I need to include space for these? It's no problem doing so but I have never seen or heard of anyone using one so maybe it's a unicorn?
5. Does the processor need to be a STM32F103 or STM32F102?
6. There's an LED on the KSGER PCB but, if it does something useful, shall I move it to the front and make it through hole 3mm?
I've got a bit more work to do and then I'll post the schematic up here, probably later today or tomorrow. Input on the above or any other suggestions is welcome.