This CMOS 4001 oscillator alternately turns the relay on and off at times set by R2. The circuit is from Electronics Now magazine, June 1995.
This circuit is from the 2005 Linear Technology Application Manual. The circuit must be powered by 5...
Originally recommended to give a tone of transmission in equipment of the 60s (tubed) this circuit is...
September 2017 - Texas Instruments TPS543C20 Step-Down Converters can be found on Mouser...