Build Your Own Raspberry Pi Weather Station with Initial State
In 2014 the Raspberry Pi foundation teamed up with Oracle to build a Weather Station for the Raspberry Pi for schools. Unfortunately, the Raspberry Pi foundation only produced a small batch of 1000 weather station kits for school and as such weather station HAT board was not available commercially. Not to be too disappointed I was determined to create my own variation of a Raspberry Pi weather station with some key changes.
Automatic 12v Portable Battery Charger Circuit using LM317
This automatic battery charger circuit automatically shut off the charging process when battery attains full charge. It can be used to charge 12V Lead-acid batteries.