Peak Indicator (CB20736E)

This circuit triggers an LED when the input signal exceeds the peak, or the value set in RV1. The transistors can be the modern equivalents BC549.

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Monostable 7555 I (CB18970E)
In the figure we have the way to trigger a 7555 CMOS monostable with a positive pulse. The time...
Asymmetrical Astable (CB6463E)
This circuit is from a 1968 documentation. It generates a non-symmetrical signal with the waveform...
LM311 Oscillator (CB5131E)
This circuit is from the manual of the used operational amplifier itself. The same setting can be...