Differential relay (CB8839E)

Found in a 1969’s Electronic Design, this circuit operates in a narrow range of voltages. Transistors can be replaced with modern equivalents.

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Monostable with Input Comparator LM3900 (CB15619E)
The circuit in the figure combines a multivibrator with a comparator, so that the trip only occurs...
Solid State Capacitor (CB16939E)
The circuit shown, found in French documentation from the 1970s, functions as a variable...
Light-driven LED flasher (CB24663E)
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