what do you need:
- a viewfinder from an old camera.
- an old 380 line black and white camera
- six Infrared LED's
- three 15 ohm resistors
Step 1: The viewfinder
The viewfinder used to be connected to the camera with 5 cables.
When I started measuring them I noticed that I just needed the first three cables those where.
- +5 volt
The viewfinder contains a 0.7 inch picture tube, a high voltage power supply and some calibration pots. The size of this module is only 2,5 x 5 cm.
Therefore the high voltage power supply could for the picture tube could cause serious injury if you touched it.
This is why in attached new cables to those connection points en put the viewfinder back together.
Now our output device is ready.
Step 2: The camera
(Sometimes manufactors put a filter in the lens which blocks the infrared light when you work carefull jou can remove it as described in my Instructable Turning an old webcam into a Night vision cam
Step 3: The illuminator
Some specifics on these IR LED's:
- Current: 100 mA
- Wavelength: 860 nm
- Radiant Intensity: 700 mW/sr
- viewing angle: 3 degrees
- voltage: 1,5 Volt
- Diode Case t-1 3/4 (5 mm)
I used the stripboard that was attached to the camera as a base for my illuminator which i made by connecting 2 times 3 LED's in series (3 * 1.5 volts = 4,5 volts) to make it work in my system that has to run on 5 volts becaus of the viewfinder and the camera, I had to place a 5 ohm resistor before the LED's to make the powerdrop I placed 3 resistors of 15 omh in parallel.
Step 4: Connect and enjoy
I am stil searching for a case to put it in and when i do I will deside what kind of battery i will use en design a circuit for battery power to the 5 volt working power of the electronics in my scope.
Images of the completed Night vision scope will be added after i have found a nice case to put it in.
Unforunatly i can't let you see what the image looks like when you look trough the night vision scope, But i can gaurantee that it works great.