This sequential circuit of LEDs was found in a Popular Electronics from the 90s. The circuit can be programmed and an adaptation consists of using optical couplers to drive power loads.
The current can be kept constant in the load circuit using the integrated regulator LM350. The...
Found in older documentation this setting applies to modern components, noting that the power...
This circuit is suggested by American documentation from 1970. It makes use of transistors of the time...