Power system shopping
- AMS117 LDOs(step down 3.3V converters)
- 5 V step up voltage booster
- TP-4056 Lithium Ion charge controller
- 6V 200mA solar module
- 5V 81 mA solar module
- 3.6V 800 mAh NiMh battery
- 3.7V 186500 LiIon battery
- Z-Diodes, resistors, capacitors and LEDs
Basic power consumption (estimates built on data sheets of modules):
Arduino Pro Mini 3.3V 1~5mA
NiMh battery tests:
Connected 5 V solar panel to battery with Z-Diode to battery and the battery than directly into the RAW input of the Arduino board. I used 3.6V (3x1.2V) NiMh battery.
In the picture is a nodeMCU connected to the hygrometer instead of the Arduino Pro Mini. More in the next article.
LiIon battery tests:
Connected LiIon charge controller (TP-4056). to solar panel then to battery and charge regulator (AMS117 or other step down regulator, hasn't arrived yet). The charge controller keeps a steady 4.2V (full LiIon.
In this picture, yes again, cheating with a nodeMCU. The above drawing is very similar nodeMCU development board.
Soon to follow: results from tests.