This circuit employs an old germanium transistor. The circuit is from a 1950s publication and uses RC coupling.
We found this digital timer circuit in a 1994 publication. The power is supplied by 12 V, which is the...
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The transistor supports...
This simulated circuit on the NI Multisim transmits modulated infrared signals with the audio...