This electronic roulette circuit with 10 numbers was found in a Popular Electronics from the 80s. The circuit uses indicator LEDs and the transistors are general purpose.
In the figure we have the way to use a 555 with hysteresis. The circuit is from old documentation and the...
Direct current motors from 5 to 12 volts and currents up to 2A can be controlled with this...
This circuit uses a NAND port to convert rectangular signals from 50 kHz to 1 MHz into triangular...