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.
This excellent 3-transistor audio preamplifier is suitable for use with high-impedance...
In the figure is a diagram of a basic alarm with CMOS circuits and transistors obtained from a...
The IC used in this project is not common these days, but if you have one you can build a high...