This circuit was found in an American documentation from the 80's. The sensor is a special integrated circuit, uncommon in our times. There are modern equivalents.
When the phone rings, a high-powered incandescent light comes on. This circuit can be interesting to...
The purpose of this circuit is to cut the peaks of a sinusoidal signal so that it is close to a...
This simple 3-channel passive mixer can be used with low-intensity signal sources but requires...