Blown Fuse Alarm (CB6109E)

We found this circuit in a 1967 Electronic design. However, it can be easily implemented even today as it uses only common diodes.

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Garage door photo control (CB8317E)
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LM3914 Moving Point Voltmeter (CB25450S)
We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit has a...
Temperature compensated regulator (CB8692E)
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