- on Power Supplies
- Published in issue 4/2007 on page 0
Solar Cell Charger (Mini Project)
Avoids overcharging of NiCad batteries
In theory you could just connect a solar panel via a Schottky diode to several batteries connected in series. The internal resistance of a small solar panel is sufficiently large to limit the charging current to a safe value. But with such a simple circuit it would still be possible to overcharge the batteries. That's why we’ve put together a little charging circuit that avoids this.