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Do you know a schematic for a machine that makes sparks for igniting gunpowder or other flammable things? Something easy to make, but effective, so I can light up gunpowder at a distance of 20m. Something whit transformers or capacitors...


use a cord less drill battery and that will ignite gunpowder , fireworks,etc.

i think the best is to make a switch that gets closed mechanically by the clock arrows this is also the safest - you dont want it to blow up in your face cause of defective plastic parts deep in the mechanics of the clock

??? i would just cut the wires heading to the speakers and rig em up to a capacitator or something, or just use em plain, but it has to have battery back up.

I tried that, not enough power, it only gives about 0,5 to 1 V and that is not enough to light up the metal cotton! How can I step up the voltage? I wanted to make, like an electronic switch, so that when the alarm goes of it sends those 0,5 volts to a transistor and that trigers the transistor to let the current from a 9V battery.... Do you understand? :) Do you have a simpler solution?

ya i understand and it seeems like a cool idea, but i gots a question, and its whats the backup on ur alarm clock. alot of times you can get an alarm clock with battery backup with a 9 volt, or you could get a capacitator (somthin that increases voltage) youre idea seems pretty cool though,there are prolly easyer ways. i'd look into it some more, but i dont want to ruin my alarm clock and im runnin low on cash. maybe you can try it and let me know the results.

capacitors dont up the voltage. a transistor might be able to handle the amperage and voltage needed, but i would use a relay

What do capacitors actually do, I read in books and on the Internet that they basically store energy and release it when its needed, what's the difference between a block and polarised capacitor?

lets see..... capacitors store and release energy. the pass ac buty not dc. so they can filter out ac (damping) and cancel out oscillations, or the can amplify ac spikes (resonate). they do not raise the voltage. they can gradually charge and gradually discharge through a resistor (rc timer network) or discharge in one spark (think rail gun) a polarised capacitor is only designed to have power flowing through them in one direction.

can capacitors really be used (together with coils in resonance) to amplify without opamp and the like ?

yes and no. a capacitor can resonate a circuit, amplifiying swings and spikes. however, because the capacitors value is fixed, it can only resonate a certain frequency. so it is very useful for say tesla coils and resonant transformers, but is useless for amplifiying audio signals unless they are a specific frequency

say i connect in parallel a capacitor and coil. together they have 1 frequency at which they resonate if i feed into it random noise that contains the resonation frequency then in parallel it'll not conduct it and in series it will conduct only it but is there a way to make the voltage on the capacitor get higher and higher at each peak (ie accumulate more energy in the capacitor - coil at each cycle) ?

. You can't get more volts out of a cap than you put in.
. What you are describing sounds vaguely like what a PSU does (switch an inductor off and catch the "kick" in a cap) or maybe a voltage multiplier.

i am thinking about like swing on a tree if you push it the tiniest bit every time but with correct timings its amplitude will grow and eventually get very large

kinda. is there way to build something like that without an amplifier powered from external source ?

. I don't know enough about it to say. Sounds a bit like perpetual motion.

to me it does not sound perpetual you have a swing on a tree. you push it in the correct time a tiny bit each time and its amplitude rises. it adds the bits of energy together to a large amount of energy now you can get all this energy from it at once. you wait for it to come to the max point and stop it (actually it stops on its own you only have to catch it). you have mg (h2 - h1) of energy

I got another question, if you don't mind, please answer. Relay, I found on the internet what is it use fr and all that kinda stuff... so now i want to use it, and here is for what. I made a circuit, electronic lock circuit, (when you push all the correct and only the correct buttons an LED lights up) so basicaly when you push all the correct buttons you get 1,5 volt. Now, I am useing a DC powered electric motor to move the pin that is locking the box, and the motor runs, lets say on 3 volt. I have the 3 volt battery and the circuit, now I need a relay, what tipe, what model. i want, the I push all the corect buttons, to activate the motor. I can't do that with 1,5 volts that powers up the LED, I need a relay to activate, let the current pass from the 3 volt battery to the motor. Currenly, I am not interested in any other way, I want to learn more about relays..i don't want any amplifiers.... My question again is what type of relay, a model, and if it's not to much bother a picture and explanation where what is connected... I have more project that I think relay would solve the problem... Thanks a lot tech-king! -Stanislav

relays are switches and wired the same way to the controlled circuit the coil of the relay is wired to the controlling circuit. when the coil gets power its like the switch handle up. otherwise its like down relays are classified by the type of switch they replace (spst dpdt etc) / max current and voltage of the switch / voltage of the coil some relays can work on lower coil voltage than specified. for exaample 12 V relay may work fine on 9 V you can simplify your circuit if you use less different voltages. for example instead of having 1.5 V fo the leds and 3 V for the motor you can connect all to 3 V (leds with resistor)

OK, thanks for the explanation, but I don' thing you understood my circuit. When you push all the correct switches the LED turns on. I just put an LED to simplify, what happens when you push all the correct buttons is that you get 1,5 volts coming out. Now I need a relay to connect to that end that gives 1,5 to trigger the 3 volt battery... I also need a relay for my other project, the detonator on a timer. By using the ends of the wires that go to the piezo buzzer of a wrist watch, i want to connect to that a relay to trigger a 9 volt battery, so again I have about 1,5 that needs to trigger... What kind, type of relay should i look for? I looked on electronic goldmine for relays and the smallest amount that needs to trigger it is 3V, a relay that gets triggered by 3 volt, are there ones that get triggered by 1,5 or will the 3 volt one do fine??? Thanks!

okay. so when 1.5 volts hits a point, a relay needs to close and enable 3 volts to pass. correct? you want a spst relay with a trigger voltage of 1.5 volts. would you consider a different circuit?

Yes, to the first part! Is there a tolerance rate, i mean if it is a little bit over 1,5 like (1,8 volts) or if it is a bit smaller (1,2 volts) will it still trigger? would you consider a different circuit? What kind of a different circuit? please explain. :) Thanks for your help!

i would use something a little different, especially considering you have tolerances to deal with. ill try to find the one im talking about

Haha, That't the circuit I built.... and if you keep on reading you will see that it says that you put a relay where the LED is in the circuit, so..... That circuit, when you push all the correct buttons lights up an LED, and the output is about 1,5 volts.... Still, my only option is a relay, for now... Thanks!

didi you remeber to remouve the resistor that goes before the led? if so, you should get more than 1.5 volts

aaaa, Yes, good point, I will do that and and keep you posted on what did a get... Thanks!

OK, Thanks a lot for your help! When you find the schematic please post it... Thanks! :)

ok, for a n00b,like me, this is very well sad... thanks teck-king! :)

i wanted to make it small so i tried a wrist watch and as I saied before didn't work. I can try to use a capacitor, but what value??? I am also a bit short on my buject to look for a clock whit a battery backup... One day, I hope I will make this... :)

i have heard ( i wont reveal my sources) that you can get a capacitator for about 10 ish bucks, but im not sure, you could prolly just go to your radio shack or hardware or electic store or somthin and i bet they would have it

I'm sorry, but I don't understand this part a capacitator for about 10 ish bucks , what did you want to say, I need a value of the capacitor, in Farads (F) and volts (V)... I am still a beginer in electronic so... :)

I think a relay is what you want. If you can find a relay that will switch with ther alarm voltage from your alarm clock or other trigger, that will work- all you need to do is wire the alarm wires across the control contacts, and wire your 9 volt battery across the normally open (NO) switch contacts. If you ask in an electronics shop they should be able to sell you an appropriate relay, or I can give more specific information if you need it.

More information would be great... I understand what you are saying, but if you could give me an exsample of a tipe of a realy, that would be great... I really want to make this...have a traume from my last explosion whit just a fuse, so i need to make it a timer, because the fuse wasn't to long and I found my self running from a cloud of smoke the last time... :)

hey dude if thats what you want what you need is a remote detonator, not timed. it will work better. i got an instructable coming soon on it, but basicly all it is is an RC car that has been rewired to an igniter.

Coool!!! I am so looking forward to your Instructables... About the RC cars, i while ago I took apart one and made rc LEDs, at the push of a button on the remote, there are 3 buttons, one color of the LED, and there are 3, would light up... I had an unexpected problem, when I put all the circuit of the remote and the receiver, where the LEDs are, my, how to say it, RC range was shortened, very shortened, I don't know why, so I took the out of the case and it worked fine, I could use the remote on 10 meters and it would work, and when i put them back in the casing, a plastic box, i couldn't light up the LEDs on 2 meters... Why is that, do you know??? what should I do to prevent that... I put out an antenna out side of the box, just a piece of wire... And about the relay, I still want a specific type if you know one, for my timer project.... It's not just for this project, I also want to make an electronic lock, so I need, again a relay that would be triggered by 1,5 volts, so it can lets the 6 volt current pass and trigger the electronic motor... Thanks!

that sounds dangerous. what if your neighbour is using his rc car while you are setting up your rc detonator?

Well, there wont be anybody around since I am doing this on a farm yard in middle of nowhere....

about the box thing.... my guess was that the box was a resistor to the frequency so that it didn't allow as much of it to pass through. im working on my r/c instructable right now, so u can look at it l8r, but i would recomend either not using the box or drilling a hole and running the antenna through it. and about the relay, im not really to much into that stuff, so im really not the person to ask about that, im more of a direct current type of guy, maybe use a capacitator somewere, but im really not familiar with relays.

ok thanks on the advice... Im going to look at your new Instructables and tell you want I think :P

oh, and another thing, do you think you could post these comments on my orangeboard, this reply chain is getting to long and the talk is getting away from the origanl whatever it is were commenting on. so if u could reply on my orangeboard that would be great. THANKS

google marx genrator. thats all you need to know.

no problem. be carful with that though

Can I use an ignition coil from a car, like the one in the picture, or do you know where I can buy an ignition coil, cheaper and more effective?

I plan to build one like in the site below, is the site, I mean the generator properly built like it is said in the site? I see you know electronics so I am asking you this, I need your expert opinion on this? :)

Oil_Dipped_Type_Ignition_Coil  !!!!!!!!!!!!.jpg