I could pot it. But considering the circuit board traces will be adequately spaced and proper shielding of the high voltage circuit will be maintained, I do not feel that will be a necessary procedure for this simple circuit.
It does sound like a lot of fun. Small ones would recharge faster, maybe use a motion detector and set them up to squirt a small jet of water at the next person to pass by.
Acid will lower the ponds pH. If you go this route be sure to monitor the pH so it does not drop too fast or far. Once you start messing with the pH it is hard to keep it stable and that is hard on the fish. I would not do it.Originally Posted by flow T narg
One option would be to put the device into a small bog/pond with low pH plants and no fish. I have no idea if the pH would be low enough to help.
3v0
ya, I do not pla on using HCl in the pond water, there will be enough natural occurring ions in the water to perform electrolysis. The motion activated circuit is a good idea though then it would be more probable to witness the display. As long as bugs, frogs and birds would not activate the circuit.
This sounds like a lot of fun. If you actualy build it please post results/plans. If the solar power does not work out running a wires to power it would be ok for me. May need them for the people detection anyway.
3v0
For sure i will post the photos / video. First I need to build it though. So far this is what i found for a sparker circuit. I'm thinking i can replace the 555 with timing from the micro pic to control the spark duration. ? ? what do you think? { see diagram }
And what if the thing goes "boom"? Just hope the person getting "squirted" doesn't have a week heart, or it may do more than just scare the crap of out of them...maybe use a motion detector and set them up to squirt a small jet of water at the next person to pass by.
There is no "I" in "team", unless Apple makes it... Then it would be iTeam.
Hmm, i wonder what wont work on this?
I agree that if used stupidly this could be trouble. So can a super soaker, spud gun, or the family car.
"flow T narg" has the reaction chamber under the water. The water pushed out by the blast will help dampen the sound. Unless the thing explodes the reaction chamber I would not expect it to be very loud.
The real problem is harming the fish with the noise. One would have to take care to not transmit sound/shock into the water. It makes sense to put the thing in a small pond/tub with no fish.
Last edited by 3v0; 11th February 2007 at 11:45 PM.
I would pot T1 (the sparker transformer) and "remote" it to the inside of the reaction chamber. That way you don't have to run the high voltage through the water. Makes the insulation requirements less daunting.Hmm, i wonder what wont work on this?
Inside every little problem, is a big problem trying to get out.
WHy do you need the transistor oscillator to control the ignition transformer?
You could use a single MOSFET connected in series with it and the gate controlled by the PIC.
I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.
Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.
You will need some type of valve on the intake or it will just sink.
There is no "I" in "team", unless Apple makes it... Then it would be iTeam.
Ahh, cool using a mosfet would be great. How do I go about selecting one, my pic can output 5V at 20MA. Not sure what I can find for an ignition transformer yet.
How do I go about calculating the proper oscillation frequency and a proper size mosfet for the igniter application, (formulas please ???)
About the valve intake, I will be using a check valve; the entire thing will have an adjusted density to keep it buoyant. Not sure what kind of force I will be looking at though for countering the water jet forces, may sink during that time if to high of an impulse.
Thanks
You need to know the specification of the coil.
Voltage?
Current?
Inductance?
Saturation flux?
You probably won't be able to get all of the above so you'll need to experiment to some degree.
I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.
Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.
Check out this link. I found it a while back, but haven't gotten around to building it yet. From the looks of your project you may have already seen it.
As far as an ignition transformer is concerned, here are some ideas:
- Car ignition coil.
- TV flyback transformer.
- 230V mains transformer.
- Wind your own flyback.
- Xennon flash trigger transformer.
I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong.
Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.
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