This is the receiver for the previous circuit we found in the December 1992 Radio Electronics magazine. The sensor is a photodiode that must have optical features such as lenses.
This circuit consists of a relaxation oscillator with a neon lamp that triggers an SCR, generating high...
Despite being found in a 1980 publication, this circuit uses components that can still be found...
This circuit was found in an old Linear Technology documentation. The working principle can be...