Electronic watchdog circuit


Posted on Dec 11, 2010

Doppler effect sensor Nl (RD627), operational amplifier N2 (LM358), the sound of dogs barking imitation special integrated circuit N3 (KD5608) and other components. When nobody


Electronic watchdog circuit
Click here to download the full size of the above Circuit.

in Nl Monitoring area of activity, Nl of feet without signal output, O pin output N2 is low potential, VT cutoff, N3 feet of low potential instead of working. When Nl Monitoring area was activity, which pin outputs a low frequency signal, the signal amplification by N2 after making VT conduction, thus, N3s feet to get a positive trigger signal issued barking. This activity in the region to promote sound Nl Lin as the man to leave the area, and the master alarm. Adjust RP. Nl can change the Monitor distance.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Guitar phaser effect
Interface multiple keys with one wire and save pins of MCU
Switch Timer For Bathroom Light
Simple Transformerless 5 Volt Power Supply
Implementing Infrared Object Detection
mjr7 mk3 mosfet audio power amplifier 70w
Car Boot Lamp Warning (ICM7556)
digital to analog converters
Multi Rocket Launchers
Proximity detector electronic project circuit design
Nixie Clock Version 1
1995 camaro: just swapped the engine/ trans with cradle wheel well
Current Limiter - Support Material
25kHz using thyristor inverter welding machine circuit
Unidirectional thyristor dimmer lights triggered ordinary transistor circuit



Top