Slave flash (CB8700E)

This circuit was found in a Popular Electronics from the 90s. It uses a LASCR which is a photo-SCR not common today.

Central Alarm (CB17451E)
This circuit is from 1999 documentation. However, it can still be easily assembled, as all...
3-tone Unjunction Oscillator (CB3849E)
Depending on the key pressed, this oscillator produces a different tone, set in the corresponding...
Battery Charger (CB6055E)
This circuit was suggested by Texas Instruments in a 1980s documentation. The transistor must be...