Let's Make Robots!

battery charger

Solar Charger for my robot

I have placed several solar cells on the top cover of my robot, Shrödinger.

I noticed that for various reasons such as shadows falling on some cells, or one side being closer to a light, that the cells did not charge at the same rates. Solar batteries do not work well if they are allowed to backfeed the current from one to another. Consequently, I used diodes in each string of two to block this backfeeding.

Max713 NiCad/NiMH smart charger.

I made a battery charger with some free samples of the maxim max713 chip.

Maxim home page.

Chip details.

Datasheet.

Search for samples.