Suuuuuper simple circuit to wirelessly power an esp32-S2 dev kit with a supercapacitor
Posted: Wed Mar 17, 2021 4:51 pm
Supercapacitors have come a long way over the years, and recently some high capacity 3.8V supercapacitors have hit the market at very reasonable prices.
This is a 30F Eaton supercapacitor charged up to 3.3V powering an ESP32-S2 board completely — it can provide more than enough power for WiFi transmissions, with no power management or circuitry or code necessary! I was able to run the “restful_server” HTTP protocol example for a full 15 minutes!
I’m using one as a backup power supply to compensate for a puny LDO that can only output about 60mA, and it works like a charm!
This is a 30F Eaton supercapacitor charged up to 3.3V powering an ESP32-S2 board completely — it can provide more than enough power for WiFi transmissions, with no power management or circuitry or code necessary! I was able to run the “restful_server” HTTP protocol example for a full 15 minutes!
I’m using one as a backup power supply to compensate for a puny LDO that can only output about 60mA, and it works like a charm!