Simple Photocell Power Supply using MAX630

Simple Photocell Power Supply using MAX630
This is a simple and easy build photocell power supply. It uses 8 pieces of photocell and single regulator IC of┬áMAX630. This circuit capable to deliver either 4.8 or 7.2 V regulated at 15 mA with a 3-V input from a bank of photocells. R1 should be 453K Ohm for a 7.2-V output and 274K Ohm for a 4.8-Vdc output. Regulator efficiency of this circuit is about 70%. (more…)