Inverting CMOS Amplifier (CB25577E)

This gain 10 CMOS op amp was found in the May 1993 issue of Electronics Now magazine. It is applicable to any op amp.

Linear Ohmmeter (CB10685E)
The circuit we present was found in an English magazine from 1980, but it can be easily assembled, as...
Light Alarm with Tone Output (CB6440E)
We found this circuit in an American documentation from the 90s. The circuit produces a 1 kHz...
Delay Relay (CB11985E)
By activating S1 the relay closes its contacts only after a certain time interval that depends on C1....