Operated directly from the power grid, this detector was found in an 80's RCA documentation. The sensor is an ionization chamber. The SCR triggers a warning siren.
Originally this 2000 circuit was designed to be a switch to the parallel port, but with 5 V or...
This circuit using a SIDAC is suggested by ON Semiconductor in its thyristor manual. The circuit...
This interesting multivibrator was found in an Italian magazine that no longer exists. This is...