Freeze Alarm (CB14454E)

The circuit of a 1968 publication can be implemented with more modern transistors such as BC548 for NPN and BC558 for PNP.

Control Car Alarm and Electric Locks Through Remote Control Interface (CB18104E)
The circuit we have just described has been mounted in the car of the author of the project for...
LM148 5 kHz oscillator (CB18873E)
This circuit was found in an old European publication, but it can be implemented with more modern...
Positive Ramp Generator (CB15743E)
This circuit is based on a PLL 566 and generates positive ramps. The frequency depends on Rx and C...