Relays up to 100 mA can be driven by the 555 with the recommended circuit. The circuit is from an article in the September 1992 Radio Electronics magazine.
This circuit generates circles on the screen of an oscilloscope. The circuit is from old...
This very low resistance meter was found in the February 1995 issue of Electronics Now magazine. The...
This switch can only be triggered when the mains voltage goes through zero and can operate as a...