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.
We find this simple circuit that operates at a frequency of 5 to 10 MHz in an old English...
This tester was found in a 90’s Popular Electronics. The integrated circuit is CMOS 4011. The...
We found this circuit in a 1980 publication. It can be applied to Triacs of the TIC series and the...