In use telephone indicator (CB8665E)

This circuit was found in a 90s Electronics Now. The circuit can use a TIC106 for the SCR.

TV Transmitter (CB18042E)
This transmitter outputs signals to the analog TV range operating with composite video signals for analog...
3 and 6 V Stabilized Solar Power Supply (CB18661E)
This circuit, with output currents up to 500 mA, can stabilize or regulate the output voltage of a...
Infrared Remote Sound (CB17640E)
The critical point in this project is the adjustment of the optical system, mainly to avoid...