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Topic: Presence detector (Read 1 time) previous topic - next topic

crocoscore

I have a "Pyroelectric Passive Infrared Sensor" and I want to know how to make a presence detector, simply and with minimal component (and Arduino).
It's look like this sensor RE200B.
Do you think that it is possible to directly put the Source (or Drain, I don't know), on an analogic port ? Otherwise, how must I proceed ?

Thanks !

Ps: I'm beginning to really love this forum and this community. It's really pleasant to chat with interested people, to find answer... Receive hello from a young French  :P
"A person who never made a mistake never tried anything new", Albert Einstein.

MisterResistor

Take a look at some of the sketches designed around a "Hall Effect" sensor. This device looks like an IR version of the magnetic Hall effect sensor. Where did you get this device? Looks interesting.

crocoscore

"A person who never made a mistake never tried anything new", Albert Einstein.

MaJiG

So, you want to just use the RE 200 B sensor from the board -- but not the board?

Pin 1 -- Vdd -- Directly to +5VDC
Pin 2 -- Vout -- 47k ohm resistor to Pin 3 (ground)
Pin 3 -- Ground

You can attach Vout (pin 2) to an Arduino analog input pin. I might place a 0.1uFd in parallel with the resistor.

You should get readings from 0 to 800 or so, methinks.

crocoscore

It works, I have oscillation between 100 and 250 or so (with AnologReadSerial). But I think it just measures temperature. It's a little bit bizarre...
"A person who never made a mistake never tried anything new", Albert Einstein.

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