bq25504 micro energy harvesting

It has cold start through ultra-low power energy, programmable dynamic MPPT and programmable under-voltage and over-voltage threshold settings. These characteristics make it possible to design micro-environmental energy harvesting devices (mainly for traditional solar energy and other micro-environmental energy such as thermal energy, motion energy and even electromagnetic wave energy harvesting systems).

(Everything is on the way. It will be okay in a few days.

June 17

There was a problem with the board before, but now it’s soldered without any problem.

After charging with a desk lamp overnight, the voltage increased from 3.13 to 3.31 (the low-light panel solar panel used has a voltage of about 2.7v and a short-circuit current of about 500ua)

I'll try it during the day tomorrow (it's been raining for the past week)

There was something wrong with the picture but I didn't notice it at the time (it has been corrected)

It's better to just use the boards drawn by foreign experts. It's much better than mine.

Ultra-low power lithium polymer charger via energy harvesting | Hackaday.io