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Registered Member #817
Joined: Mon Jun 04 2007, 01:33AM
Location:
Posts: 15
What's I'm looking to do is to build my own air coil transformer. The plan is to have a big coil of wire (help me with the gauge and the length/number of turns) connected directly to an AC socket (can I do that, don't want to blow a fuse). Then have another, much smaller coil that will be 30gauge, convert the AC input to DC via the bridge recitifier, charging up a small, 10v, 2200 mF capacitor, which goes through a resistor lighting an LED. So whenever the reciefing end goes near the coil it'll light up. I just need help on the coil part (mostly on the AC end.
Registered Member #617
Joined: Fri Mar 30 2007, 07:29PM
Location: Buffalo NY
Posts: 49
look here: here: the first link is the one that didnt work but has a more complex circuit, the second link did work but you will need to design your own oscillator. Its not the same thing but its the same principal, good luck.
Registered Member #580
Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410
yes, low frequency will not work for an air cored transformer. You will need something like 20khz to 100khz and it works fine with just 12v you will probably have at least 100v output if you use mains voltage (at the above frequencys) which is too high, you only wanted 10V output.
Registered Member #817
Joined: Mon Jun 04 2007, 01:33AM
Location:
Posts: 15
thanks guys, I might not use ac mains because I don't want to blow a fuse or electricute myslef, but if I were to it would be a step down AC coil, so it would be around 10v.
Registered Member #180
Joined: Thu Feb 16 2006, 02:12AM
Location: Ontario, Canada
Posts: 187
You could try using the royer oscillator running off a little 12V step down transformer (even a little wall wart), instead of a flyback you would just use an air cored coil wound on a mouse pad like in the link.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi Brian
You definitely need to be aware of what are you doing before plugging things into mains.
Regarding 50Hz, it doesn't need to necessarily be 'doing anything but burning your coil up'.
Your best try would be to get an induction cooker coil and powering it from low voltage transformer. If you are lucky you might be able to light a led from few centimeters of distance, with proper receiving coil. I think some people even levitated pieces of aluminium using those.
Surely don't expect anything spectacular from that, and don't bother to wind your own coil - it's too much work.
Going into high frequencies surely makes things a lot easier.
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