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Power supply for a strong solenoid (recoil simulator)? Answered

Ok, I need a power supply for a solenoid. It is to simulate the kick of a pistol. I need a power supply that is small, so that I can hold it in my hand without being to heavy to hold for a long time or it being uncomfortable. The solenoid will have a neodymium rod made of lots of 6mm*3mm neodymium magnets inside it. The coil is 5cm long with 0.8mm ECW and 7 layers although it can be rebuilt. The point is that I need something to power this coil and let the neodymium magnets hit the wall behind the coil (wrapped around a 6mm tube) and produce a sort of kick. The power supply needs to run on a roughly small power such as two nine volt batteries (dc). This is a long question but I would greatly appreciate any help. Thanks :) (I have a circuit to make it produce recoil (electic bell...) but how will I power it to be powerful enough!?) Thanks again!



Best Answer 3 years ago

SIX AAA batteries in series give 9 volts and are more power full then the ubiquitous 9v that you sound like an owner of the factory :)

Thanks, my cap worked well, But about fast firing... So as you said 6 AAA's in series... But I was thinking what if ran those 6 AAA's through an oscillator and boosted the current a little bit with a transformer (600v), before turning it back into dc with a cockcroft and walton voltage multiplier? I would have 1200v and it would run out quite fast, but would it work?

GOOD, You have been thinking about what I said 2 days ago

"You may want a card sized up-verter from eBay to put 40 volts or more"

FIRST... when you raise voltage supplied by battery, the current decreases

SECND... the walton voltage multiplier is least able to do what you want, even a JT can do a better up-inverter.

THIRD... the guts of a throw away flash camera will give you 350 VDC from one or two AAA batteries.

You can probably get 400 V dc 100uF capacitor.

W-Croft UpVerter.PNGJT-ed1.JPGCameraFlash.jpg

3 years ago

As Steve said, you want to charge a capacitor to later hit your coil.

Interestingly the energy stored in a capacitor increases as the square of the applied voltage.

You may want a card sized up-verter from eBay to put 40 volts or more on a smaller lighter 55v or more cap to bang your coil. BTW how often ( rapidly ) do you want to fire this hand gun simmulator ?

Thanks for all of your replies; I have a capacitor circuit that I can use and it works well with a lot of kick. Though I would like to use a battery powered coil to allow faster firing... If you mean that the current will make it harder I can put 2 9v's in parallel...

9V batteries don't hold much juice at all. rapid firing = rapidly dead battery.

I don't mind that at the moment as I can put more in parralel, but how would I make a 9v powerful enough? Or is it not possible?

You don't want them in parallel, you want them in series, but even so, it won't let a 9V battery hold more energy. Even Alkaline batteries only hold 560mAh

9 volt batteries hold hardly any energy. You need to think of using a capacitor to store your bang, and, simplest, around 6V of AA batteries. Switch the cap to the battery to charge it (with a resistor in series to limit the current), switch the cap to the coil to discharge it.

+1, a Cap is the way to go

Btw, Can you post a Pic of the solenoid you built? I've been wanting to build a electronic putter for a while now, and this sounds like it might be just the solution I needed.