Ramp Generator (CB10040E)

This circuit was found in an integrated circuit manual from the 1980s. The circuit can be designed based on modern operational amplifiers.

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Water Level Indicator (CB6268E)
This circuit was found in an English publication from the 80's. It triggers a buzzer (with...
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The SN72741 integrated circuit is nothing more than the version of Texas Instruments of the known...
Emergency Light (CB506)
This simple circuit connects in external battery to a load when the AC Power line fails. S1 can be...