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.

555 Code Oscillator (CB26324E)
Found in a 1990s Popular Electronics, this circuit produces a tone on a small speaker. The keyer...
Oscilloscope Multiplexer (CB24851E)
For low-frequency signals, this circuit transforms a single oscilloscope into a dual-trace. The...
1 to 100 Mark Space 555 CMOS (CB15860E)
To obtain a large brand / space ratio, for example, from 1 to 100, we can use the TLC7555 in the...