PIR Sensor Tracking My Hand

This was a test with a PIR sensor found in an old security system. It is mounted on a servo. The sensor is read by an ATmega644 and then it moves the servo accordingly. There are still some problems that I need to figure out for it to work great. The signal from the sensor drifts slightly.

Enjoy!

Category:

Science & Technology

Tags:

• PIR
• IR
• NPN
• amplifier
• heat
• detection
• DIY
• electronics
• op
• amp
• hand

[mikeying]

what is the sensor name? eg SRF05 

[JRproducts]

@mikeying I removed it from a home security unit.

[RPEPRODUCTIONS]

what reference is this sensor??

[JRproducts]

What do you mean? I got it from an old security system that I used to have in my house.

[runmark21]

thi sis related to my thesis bro..



[Katsuk2Je]

Good job!

you can make a thermal scanner using two servos and only one sensor with a lens

[zincdustdust]

lol

[SniperPIKACHU]

Very cool idea! I wonder how did you do this? It looks like the PIR sensor is the actual stand alone sensor (TO-5 package). I understand that the pyroelectric sensors (caps) within the PIR will generate pulses according to your hand's motion.

What I will do is to determine the speed of the pulses will be generated and then set a time constrains (sampling time period.. eg: 1us). So, what if you sweep your hand faster?

Did you have a comparator after the amps or simply just plug to ADC?