I was looking a way how to integrate ESP12-E/ESP-12F with my smart home thigies. One of the first devices I’ve bought was Witty cloud - It’s a great form factor and concept, so I was trying to make my own pluggable device like that.
The idea here was to use AMS1117-3.3V linear voltage converter to drop down voltage from 5v to 3.3v.
Changes in 3.3:
- Added ADC solder pad and resistors + capacitor for measuring input voltage.
- Some reordering of components to fit everything better
Changes in 3.2:
- Added microusb (2-pin, power only)
- Removed Flash pin - replaced with solder pag.
- Added ground plane on top layer
- Added 5V output
- Added through hole under AMS1117 for better heat dissipation
- Added better text
- Updated pins definition
- Better tracks to some pins
Changes in 2.0:
- Removed Flash Button - replaced it with x2 2.54 pins
- Added separate plane under AMS1117
Changes in 1.0:
- My first revision of the board, failed one. I’ve messed up mandatory pins and spent a lot of time trying to fix it. See that