With this simple circuit it is possible to simulate a telephone line for carrying out repairs on telephone sets. The transformer must be 36 V and the diode can also be 1N4004.
We found this circuit in a publication from the 1980s. It can function as a touch switch and if...
The figure shows how to implement an inverter trigger using the LM3900. The LM3900 is a NORTON...
In this circuit we have the way to obtain a pseudo sequential effect of LEDs using 3 FETs. The...