This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon integrated circuit today.
This circuit is used to power small 12V drills used in the drilling of printed circuit boards and...
This circuit uses a not easy to find IC these days. The circuit sources 15 W to a 4 ohm load and...
This sound effect for guitars uses a 555 to modulate the signal from an instgrument pick-up. The...