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Tutorial - Nerf Maverick Aimtrak Mod with Solenoid Recoil
captaincatalyst:
Found the other site with the solenoids in case anyone is interested. I don't know anything about the site, but it's the only other place I've found these solenoids.
I'm not making much progress on my build, or the guns yet because I'm going to make things much harder on myself... My next step before continuing with my cab is to build my own CNC machine to aid in the building of my cab. And to further complicate things, I plan to attempt to design and build my own guns with the CNC machine, so check back in a year or so and see if I've made progress or given up...
:blowup:
ErikRuud:
I have dealt with AllElectronics in the past and had no issues.
GearHead:
If Andy can supply a pulse output all that's needed is a 1K resistor, the TIP120 transistor and a "snubber" diode in a standard relay driver circuit.
I think Andy's right and that there shouldn't be an issue with a common ground. For those folks who aren't familiar with microcontrollers and want to build this you can substitute the microcontroller with a One Shot circuit also known as a MonoStable Multivibrator. It's a classic 555 timer circuit that has plenty of modern low-current substitutes. If isolation is needed you can throw in an opto coupler.
I just got my AimTrak and haven't had time to experiment with it yet.
Andy - if you can supply me with the new firmware and let me know where I can pull the pulse output off of I can start looking at things. FYI - the trigger switch wiring was about an inch short to mount in your gun housing. I had to extend the wires to mount the trigger board in the right place.
Drakin:
Man...this is awsome...I have been puting off the 'Recoil' for the lack of trying to figure out the best way...I was going to however utilize the 555...I would be interested in the firmware also if Andy would be so kind..
captaincatalyst ..Nice Write up I like the circuit you built for the selenoid...How much is the programmer you used for the ic?
ids:
Edit: Perhaps user error :-[ If my understanding is now corrected, with the 555 monostable circuit, holding trigger will leave output high. I trippled the capacitor value and noticed with a single quick triggering, the LED would stay on for approximately the length of time expected.
Great thread!
Inspired me to try this myself. I thought I'd try the 555 monostable route to give a controlled pulse. Google is great in this regard. Started with http://doyle.wcdsb.ca/ICE3MI/Logic Gates/555 monostable lesson.htm
I breadboarded this, keeping it simple to begin with - just trying to drive an LED from it, using a simple switch as a trigger, and a 5V supply (DMM says 5.12V, fwiw). Not working as expected.
So I added details from here http://www.kpsec.freeuk.com/555timer.htm#monostable (e.g. pull-up resistor on "trigger")
When I push the switch, the LED goes on, and stays on as long as I hold the switch. RA = 10K, C is 10uF, expecting about a 0.1s pulse.
I tried a few different 555 chips just in case - same result each time. Verified specs of the resistors and capacitor using DMM.
Any suggestions?
Thanks
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