In the figure we have a basic shield circuit with TTL to TTL optical isolator. For the emitting LED the voltage can be different from 5 V.
This circuit produces a rectangular signal of approximately 1kHz, rich in harmonics, used for...
We found this circuit in a 1983 English magazine, but it can be easily assembled with the BC548 or...
This circuit allows you to view two low frequency signals on a single channel oscilloscope. It was...