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PIR CAMERA |
A simple automatic motion-detection Digital
Camera.
Kit price: $59.50AUD
This is the lowest-cost camera kit on the market!
Kits are available from
Talking
Electronics.
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updated 27-7-06
When the sensor detects movement in
a room it
will take a burst of 10 photos with the digital camera. Each photo is
taken at 0.5sec interval. After the 10 photos, the camera waits 3
seconds for further movement and if it is detected, the process is repeated
until 80 photos are taken.
The photos can then be downloaded to your PC (via the USB connection on the
board) for viewing.
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BASIC SETUP 1. Install fresh
batteries |
Two photos of the complete kit:
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The PIR sensor, microcontroller and digital camera
HOW IT WORKS
The camera module
The camera module is
640 x 480 (High Resolution). Each photo is approximately 115k.
In Low Resolution mode the photos are: 352 x 288. The photos are approx. 35kB
The camera is CMOS and has 16Mb internal RAM, that is cleared when the battery
is flat or removed. The circuit uses a step-up converter to step up the
1.5v battery to a 5v supply to power the CMOS sensor. There is also a
USB chip onboard that controls the USB port for downloading the
pictures to a computer with the software included on the CD.
The camera PCB is
60 x 43 x 17 mm
The camera has two different picture qualities
to choose from. The High quality function allows 20 pictures to
fill the memory. The low quality option will take up to 80 photos.
The PIR sensor module
When the PIR detects movement it will give a high output. This goes directly to the PIC chip. The PIR sensor will detect someone moving and it will pulse the chip. The chip will then pulse the line for the 'Shoot' button to automatically take 10 successive photos. If it is set up correctly it will take up to 8 sets of 10 photos of anyone that walks in front of the camera.
A PIR detector combined with a fresnel lens is mounted on a compact PCB together with an analog IC.
T
he PIR specifications are as follows:
Operating voltage 4 - 12V
Operating current 400mA at 5V
PIR Input Gain 68dB
Output pulse width 0.5 sec duration
Operating temperature -20°C to +50°C
· High sensitivity
· High RFI immunity
· Power-up delay 25sec
Due to the high sensitivity of the PIR sensor device, it is not recommended to use it in the following conditions:
1. R
apid changes in temperature.2 Strong shock or vibrations.
3. Exposure to direct sunlight or automobile headlights.
4. Air from heaters or air conditioners.
It is designed for indoor use. If using outdoors, make sure to add a suitable supplemental optical filter and anti-dew protection.
Detection range may vary in different environmental temperatures and
conditions.
A) in rapid environmental changes
B) in strong shock or vibration
C) in a place where there are obstructing material (e.g. glass) through
which IR cannot pass within detection area.
D) exposed to direct sun light
E) exposed to direct wind from a heater or air conditioner.
The PIC chip program
T
he program is code protected and copyrighted by its author.
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CONSTRUCTION
Firstly read the "operating instructions" as a
good indication of your options.
Check all of the components in the kit against the parts list to make sure you have everything.
The surface mount resistors, transistors and the capacitor should be installed first on the solder side of the PCB. Solder one side of all the surface mount pads, bring each component over to the pad and re-melt the solder and position the part. you can then solder the other end of each part.
One all of the surface mount components are soldered to the board you can start with the board level components.
Solder the rest of the components on top of the board, they include the miniature electrolytic, the switches, the IC holder and the LED. you can then solder the two PCB steaks to the top of the board, for securing the Camera module. carefully insert the PIC chip into the holder.
The PIR can now be soldered the the PCB. You will have to cut the leads on the PIR to length; about 1.5cm. Use a 2cm small strip of the double sided tape to secure it to the board in place. be careful when you are handling the PIR. Do not remove the lens cover from the PIR board, as you may dirty the pyroid sensor with your finger. This will make the sensor not very sensitive.
Install the Camera module. Place the bottom corner holes on the camera onto the two PCB Pins. Be very quick when you are soldering the camera module so the pins do not de-solder themselves from the board and make your job very difficult. the camera PCB can be solder up the top of the pins, it will be the same height as the PIR lens. keep the interface board and the camera module upright on the table when you are soldering.
First solder
the three wires that are coming from the camera module. start with the
wire that comes from the back of the white 'shoot' button that is up the
top and 90deg to the board. it goes to the hole marked 'shoot'
next solder the wire that comes from the back of the 'Mode' button, to
the PCB. the last wire that is coming from the power supply section has
to be soldered to the position marked 'power'.
The Red LED will illuminate every time the PIR detects movement in the viewing angle.
It does not have to be installed when you have found the detection
range of the sensor, as it comes on every time it detects motion.
Now solder the three wires that are coming from the camera module. Make sure they are soldered in the right positions to the interface PCB. The camera module includes a piezo buzzer that makes a mechanical noise when taking a photo. Leave it on until you are sure it is working fine. You can then de-solder the piezo and remove it from the module.
The battery snaps are last. Cut the leads on the 4-battery holder to length. Strip and tin the ends of the leads and solder them to the PCB. Apply a 4cm strip of double sided tape to the back of the battery snap and stick it to the back of the PCB lined up with the bottom of the board.
The leads on the single battery snap are cut to
length approx 1.5cm.
Solder them to the bottom of the pins on the PCB make sure the polarity
is correct.
You may damage the camera if it is the wrong way around.
Use a 4cm length of double sided tape to secure the battery snap.
The camera module is now complete. Wait to test that the whole
module is working before you heat shrink the project.
instructions about desoldering the USB plug on the board. so that it will fit into the enclosure
instructions about adding IR infrared LED's for 'Night Vision'
OPERATING INSTRUCTIONS
When first powered up, thing angle to set up the PIR. The PIR detects the movement of body heat. It may not detect small animals at about 40Kgs and smaller. This may be an advantage to stop false alarms.
The Sensor will always be on when you
turn the unit on. It has a very low current drain when it is in waiting
and waits 35
seconds for the PIR to calibrate. It will study the area in the view
for movement. The batteries will last about 100 hours of use. Even if the
batteries go flat, the camera will still retain its photo memory as it
has its own battery. This battery will last for about a month. (the single cell will
eventually go flat)
The Red LED will light when the PIR detects movement. This is a great benefit when experimenting with angles and ranges of the detector.
Put a
small piece of black electricians tape over the red LED if it is
too obvious. Don't forget when it is night time, it will be really
obvious.
The DIP switches are: Delay DIP burst mode and slow mode, and Quality DIP: 20 High and 80 Low photos
If the piezo is installed, you will
hear a series of 7 beeps when the camera is going trough the setup
process. This will get the camera into the low quality mode. The
piezo is a good indication that the camera is taking a photo as it make
a mechanical noise every time a photo is taken.
Downloading the photos is as easy as connecting the camera to your
computer with the USB lead, installing the software and pressing
'download' in the program.
Get a battery tester for
testing the AAA cells. This will ensure you know the
batteries are fresh.
You can use rechargeable cells with a solar panel
to keep the camera operating for a longer period of time.
| list of menus of the camera
module when it is setting up in LOW resolution mode there are 7 options in the MENU the Menu button will scroll through them and the SET button will select either of the two options |
Use the template above as a cutting guide to
hide the unit inside or behind an object. The holes
include 3mm for the camera lens and 18mm for the PIR sensor lens. A
slot can also be cut for the ON/OFF switch and a hole for the red LED. 
SPECIFICATIONS:
Sensor distance: 5-10metres
Sensor angle: 60°
Camera sensor CMOS 1/10 megapixel (100k pixels)
352 x 288 pixels
Power : 4x AAA (lasts 100 hours)
Camera Power: 1 x AAA (lasts 1 month)
Unit Size 5cm(W) x 6cm(L) x 3.5cm(h)
scanned digital camera instruction manual
Click to
Download
PARTS
LIST
20-07-06 |
| 7 - 10k
resistors surface mount 1 - 100n capacitor surface mount 2 - BC848 transistors surface mount 1 - 3mm Red LED 1 - Camera Module PCB with Pre- 1 - 5v Mini PIR Module |