With this circuit found in a 1965 Electronic Design, it is possible to read a peak voltage of up to 250 MHz signals.
This circuit is from a Popular Electronics from 1992. It uses two SCRs and can be triggered by...
This circuit was found in Delco documentation from 1965. The transistor is of the time, but any...
This CMOS 4001 oscillator alternately turns the relay on and off at times set by R2. The circuit is...