Temperature to frequency converter (CB7325E)

This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit that is not common today.

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Simple Brake Light (CB10668E)
This circuit came out in a publication called Electronics Handbook of 1993. The circuit shows how...
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This circuit was found in a 303 Circuits issue of Elektor magazine from the 1990s. The circuit uses...
Alarm with the 555 (CB10569E)
This circuit was published in a 1979 magazine, but it can still be easily assembled, as the...