Found in a 90s American documentation, this circuit that was used in cars of the time, detects low temperatures and light by activating a warning relay.
This circuit was taken from a popular 90's Electronics. The LDR is mounted next to the LED to feed...
No information is given on the transformer in this circuit that we found in an American 1967...
This oscillator can be used to produce signals ranging from a few kilohertz to approximately 10...