This circuit was found in a 90s Radio Electronics. The integrated circuit admits an equivalent. The power supply will depend on the integrated circuit used.
This circuit preheats incandescent lamps, thus avoiding the impact of the current when switching on,...
The circuit shown is from a 1978 Texas Instruments optoelectronics manual. The circuit can use...
Suggested by General Electric documentation from 1968, this circuit activates a relay after 60...