This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or sinusoidal encoded signals by providing an audio signal at the output.
The idea is simple: using a flashlight to cut your TV commercials triggers a relay that turns off...
This circuit checks the infrared emission of a common remote control. We found it in the March 1993...
This circuit is from 1968 American medical documentation. The circuit generates pulses of...