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.
This soft start circuit was found in a 1965 General Electric documentation. The SCR and bridge...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...
This RCA / GE circuit from the 90s can be applied to any modern operational amplifier. The number...