Based on Radio Shack 276-137, this circuit was found in the December 1995 issue of Electronics Now magazine. The circuit drives an LED but could use a relay instead.
This amplifier is suggested by Sanyo, for radio and recorder applications and makes use of a...
The Texas Instruments TPS80 LDO (Low Dropout) series (www.ti.com) can provide output voltages from...
The circuit shown is from a 1974 integrated circuit manual. In it we have the monostable...