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.

Prescaler Divider by 20 to 200 MHz C (CB16691E)
We found this circuit in a 1992 documentation. It consists of a digital signal splitter used in...
Multi Voltage Source For Walkman (CB4323E)
This 1986 documentation circuit provides 3, 4, 5, 6 V voltages under 350 mA for powering walkmans...
Triac Opto isolator Shield (CB15009E)
This circuit isolates a stage with Triac from a TTL or CMOS trigger circuit, for example. The...