Friday, June 12, 2015

Optical switch with photo sensors

Can you help me to find circuits which uses photo-sensors.and if you do have them, would you please send them to me.

Mail from TM

Just a few days back i have added one. It is to turn of-on water taps.

Optical Obstacle Switch. - one more here  thru all links in great detail.

Here is an image of a low cost gizmo that applies the photo-sensors to detect motion. They are called motion detectors.

Optical switch with photo sensors

How Infrared motion detector components work - Infrared radiation exists in the electromagnetic spectrum at a wavelength that is longer than visible light. It cannot be seen but it can be detected.

K30 PIR Movement Detector -  This circuit is designed around a custom motion-detection IC KC778B. The circuit utilizes both a PIR (Passive InfraRed) detector and a light-dependent resistor (LDR) to detect motion up to 6 meters away.

PIR Controller – KC778B

The MPCC has been designed for easy implementation of AC control functions that use a Passive Infra-Red (PIR) motion detector. Due to its high sensitivity and reliability, it is also widely used in security product.

PIR Controller -KC778B - Auto Camp Light

Above is an example of  camp light using the KC778B. Uses battery 12VDC. Internal voltage regulator is used,  but can work down to 7V.