This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power supply is made with 5 V that can come from the analyzed circuit itself.
The astable multivibrator shown by the figure can produce signals in the 10 to 10 000 Hz band...
Placed near a telegraphic transmitter (CW) and with a small antenna or pickup, it reproduces the...
This power control for the AC power line uses a Triac and an Unijunction Transistor. The control...