At the experimental stage! Do I jump for cover?

As long as your transformer can handle the current this might work, although your voltage may not be 12 volts dc. I am not sure how you are measuring the 12vac if it is rms or peak. You will also have some loss in the rectification, typically you lose around 1.2v going through a diode. Anyhow as long as everything can handle the current (which might be a lot for an air pump) and you can tolerate some small voltage differences since you are only driving a motor, it should work.

A pea shooter with pan and tilt sounds like a good blog entry for workbench creations. I thought about making something like this when I was a kid, although I wanted to load it with those bang snap things you throw on the gournd. Would you like to take some pictures and write a short description about it?

Go for it...there is nothing too drastic there. Presumably it will only run in short bursts.

If it is going to be powered for a longer period...keep an eye on the temperature.

Transformers usually run pretty warm. If its 'ouch' hot (80^oC) then you need more power Igor

Remote pea shooter my ass... _{<ping thwack ouch>}

Del

Assuming you mean 24 vrms and assuming the transformer is rated for the current you are drawing then you should see around 13.3 vdc at your pump, which will work fine for something designed for an auto (13.6 vdc) electrical system.

If I can get this thing up and running then I will do a spread with photos for the CR4 crazy contraption page! I feel patio domination is within my grasp..hahahahahaha

Even if you don't get it going, it would still be a good story. You can document your problems, and I am sure you will get plenty of suggestions.

The best way to get the 12vdc from your set up, assuming the Tranny is big enough, is to install a diode in the 24v leg and 0v leg which common and return to the centre tap via the compressor motor. That will balance the load and reduce the risk of overloading one half of the transformer.

Sorry I don't have the facility to attach a drawing, but if you look up "Full Wave Rectification" both the method you have drawn (4 diode bridge) and the centre tap 2 diode method will be shown. You may also see some 3 phase representations but they are not applicable.

Hope it works, Paint Balls will tell you which cats refuse to learn, if you can exclude the mess.

So this is a better, more balanced solution?

Thanks for the drawing Del!

Thanks Emjay4119 for giving Del the opportunity to stretch his paws!

I think this is going to look like an awsome beast when finished!

This weekend I will be attempting the fine art of barrel making! So do I spiral or not Only joking! The 1/4" copper A/C pipe will be just right for the dry dog food pellets! Eco friendly. The cats pick on the dog and flirt with the cat, I pick on the cats, dog eats pellets, cat safe, dog happy, ! A good status Quo!

Oh for a simple life!!

That is it alright and I don't see your post as off topic.

I LIKE the idea of water soluble paint balls!! That is going to have a much better effect on a stray cat than a quick sting in the rear. Especially with the time it takes him to clean himself. You can just wash down the remaining evidence with a garden hose.

Bill

Sounds like a great toy. Now if you use a proximity sensor to activate the trigger, you will not have to stay up late at night, and turn on the lights. I have made two stationary air cannons first one is large enough for a ping pong ball, but not a golf ball. The second one is made out of 2" pipe. I spent half an hour trying to chase a possum out of a tree with the smaller one. Used newspaper and foil. I gave up and used a water hose instead.

What the hell are you talking about?

Do I take it you have got a computer controlled peashooter on your roof with a compression tank operating a BBgun sort of thing you want us to advise you about?

Go ahead and all out and put the airgun on a rotor motion control ball swivel with a long arm run to a tube air feed with a slide valve for pingpong or smaller throw of projectiles to obviate the need for pan throw of water on cats.

Videocamera 3D camera information supply in real time to motioncontrol setroundrail of a Waterpistol, is recommended.

Check with Hongkong supply of Cat stuff control and supply of cat supply and rat war weapons for full information as far as success with your semi sensible goals.

This is a serious war for me! Every year I end up having kittens running all over the place! The problem is, It's not only my cat that uses my patio for giving birth, it's all the other cats who come and do the same! Last year I ended up with 16 kittens and only 3 were mine! So if I can just keep the cats out for this brief spell of madness, hopefully the other mothers will stay out as well!