10-Step Sine Generator (CB24472E)

This CMOS generator with the 4018 IC was found in a November 1976 Radio Electronics magazine. It uses a 741 op-amp as the audio amplifier.

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10 MHz Bandpass Amplifier (CB4220E)
Found in a 1980s documentation, this amplifier uses an integrated circuit of the era. The RLC...
Two-step relay lock (CB8835E)
This circuit produces a voltage drop in the first pulse, turning off the relay. On the second...
Operational Monostable (CB18233E)
Operational amplifiers or comparators like those in the LM139 series can be used on this circuit,...