Pulse Scrambler (CB20547E)

This circuit assumes that a pulse produced by S1 has a constant duration determined by R1 and C1.

100 kHz Calibrator (CB5607E)
This circuit was obtained from Popular Electronics of the 1990s. The circuit uses common...
50 Ohm Line Drive Amplifier (CB4040E)
The circuit shown uses an operational transconductance amplifier such as the LM3900. Transistors...
Code Practice TTL Oscillator (CB4188E)
This simple Morse Code oscillator was found in a 1980s American documentation. The power supply...