Create your own solar power supply with this easy design, based on a previous tutorial, solar power for small electronics projects.
This could be used to generate a near permanent power supply for a variety of electronics projects, including potentially the blind controller! Watch this space…
For this project you will need:
TP4056 Li-Ion Battery Charge Controller:
https://www.banggood.com/custlink/KGmmYIsB5L
TP18650 3.7V Li-Ion Battery (2600mAh):
https://www.banggood.com/custlink/KKDmESs4HB
6V 4.5W Mono crystalline Solar Panel:
https://www.banggood.com/custlink/GvD3YIs0PU
5V 1A USB Step Up Converter:
https://www.banggood.com/custlink/mvK3ESN6SK
OR MT3608 DC Boost Module
https://www.banggood.com/custlink/KGmvJ1h7GL
The 3D printable housing can be found at Thingiverse:
https://www.thingiverse.com/thing:3622230
Circuit details:
More images:
Do you think TP4056 can handle 2 batteries in parallel?
Wouldn’t that create problems with balance charging/different voltages/overcharging/overdischarging?
I think it’s OK so long as they are the same battery type and charge level, similar to using a larger capacity battery. As they are in parallel you can always just use one battery if you can get away with it.