Solar flashlight (CB20488E)

This circuit charges a battery to power a flashlight at night. The circuit is from an English publication from 1991.

Astable CMOS 4069 (CB17316E)
This version of an astable CMOS with the 4069, and which appears elsewhere on this site and in...
Symmetrical 15 V power supply (CB8498E)
Found in na 1970 EDN this circuit has a parallel regulation providing a symmetrical output of 15 V....
Remote control receiver (CB22360E)
This circuit is the receiver for the previous remote-control transmitter. We found it in the same...