This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the frequency of a rectangular signal. The power supply must be 5 V.
We found this simple circuit with headphones listening in Radio Electronics magazine from March...
Found in a 1970 EEE, this circuit uses general-purpose transistors of the time. Transistors support...
The amplifier gain shown in the figure is given by R1. The circuit is valid for other photodiodes and is...