Solar flashlight (CB20488E)

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

Digital Cassette Recover (CB13606E)
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...
0.1 to 90 Seconds Unijunction Timer (CB1253E)
This circuito from the 1977 GE Semiconductor Manual circuit provides timings from 0 to 90 seconds...
800 W dimmer (CB5277E)
We found this circuit in an American publication from the 1990s. The triac must be equipped with a heat...