Found in a Philips documentation from 1968, this circuit detects the trimpot set input voltage. The operational can be of almost any kind.
This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave...
This two-channel bargraph meter uses a single KAA2281 integrated circuit. Found in the January 1991...
This circuit allows to increase the output power of a 741 as an amplifier. The circuit is from a...