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.

Fourth Order Butterworth Filter (CB4909E)
This filter was obtained from a Linear Technology manual from the 1990s. The power supply must be...
Video amplifier (CB8743E)
Found in a 90s Popular Electronics, this circuit is intended for amplifying analog video signals....
Voltage Detector for Battery Chargers (CB6061E)
Based on a 555, this 80's American documentation circuit detects the voltage of a battery and can then...