This circuit was found in an American documentation from 1969. It serves to trigger circuits by providing a 7.5 V signal at the output from 500 mV pulses.
This is one of many Morse code audio oscillators that can be found in this section. The circuit...
This circuit provides an output voltage with approximately twice the input using two power...
This circuit was found in a 90s Popular Electronics. The integrated circuit used is similar to the 741....