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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Triac charger (CB9534E)
This circuit was found in an American documentation from the 90s. It consists of a variable with a...
Tone Burst Generator (CB12651E)
The circuit shown in the figure generates a pulse train whose frequency is determined by the...
Battery Charge Indicator LM10 (CB14325E)
We found this circuit in a 1994 Linear Applications Handbook by National Semiconductor. The LM10...