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.
Using the 4001 integrated circuit, this latching relay can employ any general-purpose transistor. The...
This VU circuit has a different effect given using two 4017. The circuit is from 1997...
This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF...