"Home-made" Sensor Schematic

Archilochus

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Hi all,
Just finished drawing this schematic for the "home-made" PIR sensor that I've been using for my cams.  Anyone interested in making their sensor from scratch might want to give it a look.  It's a combination of circuits taken from http://www.glolab.com and LSI/CSI Computer Systems.  Total power is about 50 microAmps (0.05mA).  Costs about $8.50 in parts not including the Fresnel lens.  I made it  with SMT parts and its circuit board is only about 1.75 inches sqare.

http://www.geocities.com/archilochus57

I'm working on drawing up a simplified timer circuit for the Owl cams (my previous circuit was made for the Fuji AF 60's) that trips the shutter and generates an adjustable picture delay time.  I'll post it when it's finished.

Good Luck!,
Archilochus
 



Tinhorn

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Archilochus

Thanks for posting the Schematic (what is the power supply range?)  I might give it a try when the MS20's dry up.

Is the program you used to draw this up FreeWare?  Looks good, I'd like to try it....

Thanx

Tinhorn
 

Archilochus

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Hi Tinhorn,
The circuit can tolerate (MAX) from 3 V to 15 V.  I'd try to keep it between 4.5 to 12 though.  I've not used it with anything but a regulated 5 V supply, so I don't know how it will behave above / below that voltage.  Some PIR sensor elements might have a lower MAX voltage, check specs on specific part.

The program used to draw it was a demo of WinDraft Version 3.00.  The new version is 3.01 and a demo is available from:

< http://www.ivex.com >

The actual WinDraft file looks much better, the posted image is a JPG converted from a GIF taken as a  "screen shot" taken while running WinDraft under Windoze 95 running under Virtual PC on a Mac.  Lots of detail lost in translation.

Working on drawing up the day/night sensor that disables the circuit at day or night or lets it run 24 Hrs (selectable).  I'll post it when it's done.

Good Luck,
Archilochus
 


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