SnowMonkXV

'azrael', on 15 Dec 2013 - 01:52 AM, said:

Now, the second set of flywheels should be run off something better than a 9V, for sure. I think even another pair of eFests, but in series, should be really good. 9Vs are terrible batteries.


An ammo counter is a simple thing to build yourself if you just have infrared emitters and detectors and a micrcontroller, like say, an Arduino Mini Pro or something.


EDIT: Nice job on the afterburners, didn't know you were doing that. I'd like to try that some time.
Any chance you can have access to some kind of chronometer? I would trust fps numbers much more than ranges.

As it stands, the initial set of flywheels run off the 9v. This will most likely be temporary, and swapping out for a second set of Efests sounds like a solid idea.

As for the ammo counter, I was well aware the advantages of custom building one from scratch using an Arduino. However, while I could easily learn everything required to do so from scratch, (Coding, placement, PCB use). For this simple (Can it be called that?) build, after finding the kit used, it took all the trouble shooting out of the equation, and saved me the time. Not the most sensible DIY choice, but what I chose regardless, and am very pleased.

"EDIT: Nice job on the afterburners, didn't know you were doing that. I'd like to try that some time."
Not quite sure what you are referencing here....

As for a chronometer, I do not have access to one at hand, however I have a few friends I will get in contact with.

A few weeks down the road I'll do some upgrading to it, and I am looking for ideas or anything to improve/build upon.

Any thoughts?

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'azrael', on 16 Nov 2013 - 7:08 PM, said:

finding a pot rated that low? Heh? Any 1/4W potentiometer will work just fine.

I don't recommend running them in parallel, only because the forward voltages will vary a tiny bit with each LED. You can measure them for perfect matching, or just get lucky, like I did when I built my halloween costume.
If they each have independent resistors, you'll get a more even lighting, or could at least compensate.

What's a "usable size"? I know Radioshack's huge, but a 9mm pot would be pretty good. They're not expensive. I buy them from smallbearelectronics when I buy stuff for guitar tech work.

Yes, I've got about a dozen LED's all with individual resistors for each light, and was planing on using a Pot. right after my power source to act as a switch, as well as a dimmer. This has been on delay, however I'll see if they have anything later today.

Surprisingly, not so much. My Accessories power source is 4.5V (3 AAA), and my main LED's which I'd like to have control over are rated at 2.2V. Now, I already have a resistor for each LED as I'm running them Parallel, which could count as the minimum, however finding at POT rated that low, or at a usable size,is proving difficult, unless I special order....

Meh, its low on the priority list right now.

As suggested, two 1N5400's in series worked absolutely perfect, both in size, ease of install, and amount of power drop. Now to get something for my LED's. However, I feel I may try to find a potentiometer for those, I'd rather like to have a wider range over dim/bright.


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