Monday, August 31, 2009

Infrared Intruder Alarm

This the circuit warns the trespasser infrared system or Infrared Intruder Alarm circuit that interesting. By when there is a person passes or cut the light infrared.


http://www.elecfree.com/electronic/infrared-intruder-alarm/

Sunday, August 2, 2009

Low impedance mini amplifier | Circuit Project Electronic

Low impedance mini amplifier Circuit
This circuit can apply to signal sound source that has low impedance , such as from 4-16 ohm size loudspeakers or telephone earphone that use to replace