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Posted: 9/12/2014 9:28:56 PM EDT
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Hey guys, I'm an engineering student trying to design a bullet counter, and I'm hoping you all can help me out.
A friend and I are trying to build a device that mounts on top of a gun and detects how many shots have been fired. The idea is so you can tell how many rounds are left in your magazine. The way it works is there's an LCD display connected to a tiny CPU that is programmed to count down from 30 every time it detects a shot being fired, and it update the display accordingly. We're trying to figure out a way to mount the circuit board and LCD display onto the top of the rifle, and that is where I need your help! Is there any way to get the mounting hardware (the bottom part that is made out of aluminum and clamps onto the rail) for a red dot sight without having to purchase the whole red dot sight? I'm basically looking for a picatinny clamp that will act as a mounting platform. It has to be flat on the top so I can mount a circuit board and other stuff on top of it. Here's an image that shows what part I need: 
The closest I've come is this 45 degree offset thing on amazon: 
http://www.amazon.com/UTAC-Degree-Offset-Picatinny-Weaver/dp/B0084QZTLW/ref=sr_1_14?ie=UTF8&qid=1410566534&sr=8-14&keywords=picatinny+rail+mount Only it's not as long as I'd like it to be and I'd have to hacksaw off the 45 degree angle. The easiest thing to do would be to buy a red dot sight and strip all the components off the clamp and use that, but I'm a starving college student and I'm trying to find a more "economically viable" solution. 
Is there a website or product (like EOTech) where they sell individual components for a red dot sight, like a repair website or wholesale parts dealer, where I can buy just the bottom mounting platform? Thanks! |
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Quoted:
Stupid me, I clicked this thread thinking it was going to be an awesome counter made of bullets and brass, like a kitchen counter... After OP completes his project, who wants to help me make a bullet counter, or should we call it a counter of bullets? Well it could have been about reloading as well... that's why I stopped the drunk forum surfing to come in here. |
Someone beat you to it. There is already a digital round counter for semi-auto handguns and AR15. The one for AR's is wireless.
http://www.amazon.com/Digital-Round-Counter-for-AR15/dp/B00H591WTC |
| For those of us w/ different sized magazines, it would be helpful for the counter to count up, instead of down. Unless you're going to have a fancy electronic floorplate that tells your counter what capacity each magazine is. Or a little widget glued to each magazine. |
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Quoted:
Someone beat you to it. There is already a digital round counter for semi-auto handguns and AR15. The one for AR's is wireless.
http://www.amazon.com/Digital-Round-Counter-for-AR15/dp/B00H591WTC Quoted:
Someone beat you to it. There is already a digital round counter for semi-auto handguns and AR15. The one for AR's is wireless.
http://www.amazon.com/Digital-Round-Counter-for-AR15/dp/B00H591WTC My design is a little different from that one, and I think mine has advantages to it that will make it stand out. And besides, just because I'm not the first to make something doesn't mean I shouldn't try to make it. Microsoft made tablets long before Apple came out with the iPad, ya know
Quoted:
YHM mini riser. Google it. That's not exactly what I'm looking for, but thank you. Quoted:
For those of us w/ different sized magazines, it would be helpful for the counter to count up, instead of down. Unless you're going to have a fancy electronic floorplate that tells your counter what capacity each magazine is. Or a little widget glued to each magazine. The counter isn't going to determine how many bullets are in a magazine by reading the actual quantity of bullets in a magazine. That's too expensive and comes with too much baggage. I think that's why the product that ewetstone linked to earlier hasn't taken off. Instead, our bullet counter is going to assume there are either 10 or 30 rounds in a magazine, adjustable by the user, and count down from those two quantities by detecting when a round has been fired. It's also going to have a count up mode, in case you want to count how many rounds you've fired throughout the day. |
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Quoted:
There's another ammo tracker out there: Leitner Wise Countashot. There's an awful lot of 20 round magazines out there that are used, and also 150, 100, & 90 round drums, as well as 40, 60, 100 - and 15 round magazines. If you limit yourself to 30 & 10... Duly noted. |
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