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 old oscillator using germanium transistors has a high impedance headphone as inductor to...
This circuit from a Popular Electronics from the 90's can generate signals from 0.03 Hz to 3 kHz...
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...