hello,I'm trying to create a project with motion sensors that detects "hand swipes". I was thinking the easiest way was to have a beam brake using IR sensors and found the "sharp - Infrared Proximity Sensor" that works upto 80cm but I need 6 separate points of detection (or 6 switches) which gives a total cost of 6*10 = £60!!!! ..bit too expensive!
I was wondering if there was a cheaper way to achieve motion detection. I notised while doing my research that the same thing could be done cheaper with some other IR detector and emitter pairs but I dont know enough to work out if the items i find will work with the distance I need.So i guess I'm hoping someone can either guide me to a cheaper option or help me out with getting the right IR detector and emitter pair with a detection distance of around 1metre.
Hey thank you for your replies,I agree, the sharp IR sensors are over kill which is why I wondered what else was out there.I found this pair (i think they will work together) but like the other ones i found i have no idea what distances can be achieved:Phototransistor: http://www.maplin.co.uk/infrared-phototransistor-2252Emitter: http://www.maplin.co.uk/high-power-infrared-emitting-diode-2253another Emitter: http://www.maplin.co.uk/3mm-infrared-emitting-diode-48038I'm looking for something that can transmit over about 80cm. Could this pair really do that, or would i need to boost it's signal or oscillate something and if so how would i go about doing this?!sorry for the simple questions, I'm a noob and I'm getting no luck on google