Search found 3 matches

by gritnix
Fri May 15, 2020 12:02 pm
Forum: ESP32 Related
Topic: Max Vin voltage
Replies: 4
Views: 10848

Re: Max Vin voltage

Hello, Sorry to revive an old thread, but I'm wondering what your solution was. I'm thinking very strongly about hitting the board with some hot air and removing the regulator and replacing it with an MCP1703, 16V max operating input (the absolute max is 18V). I have a 15V project where I'd prefer n...
by gritnix
Sat Apr 18, 2020 9:27 am
Forum: ESP32 Related
Topic: Most efficient battery setup?
Replies: 3
Views: 6927

Re: Most efficient battery setup?

One other tip. If you're using I2C, try to get a low current sensor, something no more than in the 20mA range, and try to make it 3V3. Use an IO pin as the Vcc to the sensor. We'll call this the control pin. Don't hook your sensor directly to 3V3. Hook the pull-up resistors for SDA and SCL to this c...
by gritnix
Fri Apr 17, 2020 4:49 pm
Forum: ESP32 Related
Topic: Most efficient battery setup?
Replies: 3
Views: 6927

Re: Most efficient battery setup?

Are you still looking for a good low power setup? Hopefully this will help someone in the future. I've found, with multiple esp32 boards, that pin selection is everything. Some pins, for known reasons, some for unknown reasons, refuse to go into a Hi-Z state when the ESP32 is put into deep sleep. If...