max voltage that can be applied to the PIR sensor #555-28027

OzStamp

Hi to all

Can somebody tell me what the max and min volts that can be applied to the PIR sensor #555-28027

Would 6.6VDC be okay as the max volts ...?

Pls advise

Ron Nollet

Australia

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OzStamp

Hi Mike

There is a Voltage regulator on the PCB CYT119AKG ....also reverse polarity protection as well with a diode.
There is no SX chip on there ..some custom chip marked "BISS00001" and a smd part marked YDAWA2Y

The input caps on the supply ( + and -) are rated at 16VDC ..

Hopefully one of the Parallax techo's can answer this for us

Cheers
Ron Nollet Australia

Mike Green

The datasheet for the PIR sensor says that voltages from 3.3V to 5V are allowed. I wouldn't use 6.6V. That's asking for trouble.

Here's a datasheet for a PIR control IC: www.comedia.com.hk/fp2008/Spec_PDF/KC778B.PDF. I have no idea
whether Parallax uses this IC or something similar, but it does show what some sensors may allow.

OzStamp

Hi All

Dave Andrae tech support Parallax applied 6.64 VDC to the PIR sensor and it worked fine.
I after nyself applied 7VDC to the sensor overnite for a period of about 12hrs..
All is well..
We dont recommend you do this but it works ...
Wish I could find info on the Voltage regulator as I suspect it can take 9VDC ..(see CYT part number mentioned above)
cheers

happy Easter to the all around the globe..

Ronald Nollet
Australia

Radridz3

I put 6+ volts to that sensors and it never settled at power-on ..It just kept going high and low....The regulator onboard is weak so just throw a 7805 in there somewhere... I use about 12 of these on a n scale train set and they all work flawless at 5 volt.....TTL is always happier at the proper voltages.. In my expierences. But I'm still a NEWb compared to some of the people on this Forum......