This circuit uses components that are still common despite being from 1995 documentation. The circuit can be powered by 6 to 12 V voltages and the speed of the LEDs' sliding effect is set to P1.
In the figure we have the way to obtain 500 gain from a FET. FETs can be BF245 or MPF102. The...
With the circuit shown in the figure, we have a logic signal to activate a calling device when...
Found in 1980s Electronics Design, this circuit covers 4 decades of frequencies with a unique...