1) To run from12v (I will use power tool battery packs for ease of use).
2) Be easily portable as it could not be left in the hide.
3) Screen had to be big enough to be viewed by up to 6 people
4) It had to be inexpensive.......
What I will present to you is the prototype I produced using a lot of parts I had knocking around the workshop plus some ebay bargains! This one cost around £150, the final one will be a similar cost but a one piece unit rather than cable connected.
This is not a detailed build instructable, it is more an exercise to show that with a bit of lateral thinking items that can be picked up very cheaply can be adapted to do the job of much more expensive items.
Step 1: The Camera
The camera I am using is one of a pair I won for £60
it has day and night capability and a 220 X zoom (22 X optical X 10 digital)
Step 2: Pan Motor
I hoped to be able to convert it to 12v DC but the best I could do was modify it so that I could control the direction of movement
I will explain how I will be doing the 12v DC one later... :)
Step 3: Tilt Motor
For the final model I have obtained a mirror motor with the folding motor attached, this should give me pan and tilt in one unit.
Step 4: Join Them All Together As a PTZ Unit
The 7.8" monitor in the background was £49.00 from ebay
Step 5: Controling the Pan, Tilt, Zoom and Focus
The zoom and focus were controlled with car window switches which are 3 way, sprung to centre off.
The second picture shows the focus and zoom switches on the left and the mirror joystick switch on the right whilst the wiring was being undertaken.
The third photo shows the completed cotrol unit..
Step 6: The Camera Assembly Completed.
The other photo shows a test run, the screen on the bench shows zoom at X1 the inset screen shows X220 zoom.
Step 7: ..... and Finally
The control unit now sits beside me on the computer desk and the camera monitors my front garden day and night ( I have now connected it to my computer to record events)...... This is a very high quality setup for not a lot of money, it compares very well with the one that monitors the back garden, and is a lot more portable!
This is not the easiest of builds, I really enjoyed the process and I am sure some of you would have little difficulty building your own version, just remember to think laterally as parts designed for one purpose can be used for others .
To build something like this as cheaply as possible here are some pointers for if you buy from ebay.
1) Carefully work out what you need to buy.
2) Set your maximum price for each item and stick to it
3) Bid at the very end of the auction with your max price (snipe with 5 seconds to go) this way you may get it for less.
4) Take your time, if you don't get the item the first time there will be another listed soon.
Also worth thinking about is that a number of the items used here are from cars, do you have a local car wreckers you can visit?