Constant current source (CB20484E)

This circuit uses a current regulator from the 90's. This component is uncommon nowadays. The transistor admits equivalent.

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...