LM3900 Rectangular Oscillator (CB25179E)

This 1 kHz oscillator uses a Norton LM3900 operating system. The frequency depends on C1 and R1 and can be changed.

Voltage to Period Converter (CB4817E)
This 90's Electronic Design circuit converts the period of a signal into a frequency. The...
Power on reset (CB7176E)
These reset circuits when the power is turned on were found in an 80's EDN. The circuit also...
FM receiver with BC548 transistor at output (CB23552E)
The receiver shown above was sent in by contributing reader Adriano Muniz Moura and is used for...