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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Phonographic oscillator (CB8247E)
This circuit was found in a Modern Transistor Workbook from 1965. The circuit sends signals from a...
Warning notice (CB7977E)
What this interesting circuit does is to warn that a note written on a paper has been removed and...
Counterphase FM Transmitter (CB19442E)
This transmitter with counterphase oscillator was obtained in a documentation from the 90s. The...