This was something I put together for a colleague at work who is into his Air soft guns.
We were talking and he said it would look cool for his night games if he had a Predator style laser site for his rifle.
So, I looked on eBay and found some red laser modules that run on 3.4V at around 17mA each. To keep it quick, simple and easy to both assemble and to fudge about later I chose an adjustable DC – DC converter to drop the voltage from a 9V PP3 battery. This also allows you to tweak the voltage to get the best results.
1 x Plastic housing that will fit to the barrel / stock
1 x 9V PP3 battery
1 x battery clip
1 x switch
1 x DC – DC converter
5mm plexy or acrylic
3 x laser modules.
We were talking and he said it would look cool for his night games if he had a Predator style laser site for his rifle.
So, I looked on eBay and found some red laser modules that run on 3.4V at around 17mA each. To keep it quick, simple and easy to both assemble and to fudge about later I chose an adjustable DC – DC converter to drop the voltage from a 9V PP3 battery. This also allows you to tweak the voltage to get the best results.
1 x Plastic housing that will fit to the barrel / stock
1 x 9V PP3 battery
1 x battery clip
1 x switch
1 x DC – DC converter
5mm plexy or acrylic
3 x laser modules.
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Signing UpStep 1: Mark and drill
First mark the size of the end of the plastic housing onto the plexi, then make a triangle that will end up inside the housing once you drill through.
The laser heads I had were 8mm diameter, so you simply drill the 8mm holes in the plexi. Cut it out and round off the corners. Use this as a template for the end of the housing, then open those holes up to around 9mm to make the assemble easier.
The laser heads I had were 8mm diameter, so you simply drill the 8mm holes in the plexi. Cut it out and round off the corners. Use this as a template for the end of the housing, then open those holes up to around 9mm to make the assemble easier.
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I worked on it months ago... mounting it in a 2AA black metal lantern but...I did lots and lots of tries looking for the perfect triangle fit and finally I burn the diodes by heat or break it twisting the plastic, I'm not sure.
Try to form a perfect triangle at any distance. It is not easy.
With the 5mm plexi and drill the holes with a drill press it is not that bad.
It spread from about 30mm point to point at 3m to 60mm point to point at 10m
over longer distances it kind of spread right out!
Seemed like a simple idea at the time thugh :-)
I tied the pointers tight together with steel wire, using toothpick's tips as wedges to leverage them.
When I insert the PERFECT triangle fit in the lantern they twist, and I cried.
I continued trying without success again and again until the pointers start to lose bright and finally failed.
On one of the dots I had some glue go onto the lens and that is why it looks a bit out of focus.
Wont be long before we can buy a nice cheep one from China!