Electronic Circuits and Projects Forum

1. Transformer for a stun gun circuit.

I found a stun gun circuit on the web, everything is ready but transformer.
Couldn't find any transformer to reach at least 150.000 volts
There are stun guns reaching around 500.000 volts and they are not huge, as big as a mobile-phone. So, what kind of a transformer am I supposed to use ? Everyone I asked told me it's not possible to reach that voltage with a transformer.

2. You will be stunned at what the courts will do to you after the cops find out you have a stun gun! E

You will be stunned at what the courts will do to you after the cops find out you have a stun gun! E
Well, thanks but that's not the subject

4. Everyone I asked told me it's not possible to reach that voltage with a transformer.
Its possible but it would be big.
TVs us fly back transformers to make a few tens of thousands of volts.
Look in to SMPS.

5. There are stun guns reaching around 500.000 volts and they are not huge, as big as a mobile-phone.

Consider that 25000 volts will spark across a gap of 1 inch in dry air.
So 500,000 volts will jump across 20 inches, does that seem sensible, a useful practical tool?

If a stun gun can be considered a useful practical tool in the first place.

JimB

6. Found a little audio transformer;
http://cgi.ebay.com/ws/eBayISAPI.dll...ht_1313wt_1187
How much can it magnify the, say 15Volts ?

7. Get a disposable film camera and take the transformer from it. http://hackedgadgets.com/2008/05/30/...lash-stun-gun/ The used ones are even free at most places that develop the film.

8. Originally Posted by zoom
Found a little audio transformer;
http://cgi.ebay.com/ws/eBayISAPI.dll...ht_1313wt_1187
How much can it magnify the, say 15Volts ?
You need to do your turns ratio.

600ohms to 120000ohms

1 to 200 ratio

15 volts x 200 = 3000 volts

Found another one;
http://www.ebay.com/itm/EI-14-Audio-...item23193143cd
This one is magnifying about 266 times.
However another point is still ambiguous; How can I determine the maximum voltage I can apply to primary coil (the coil with less turn) in order not to burn the transformer ?

Originally Posted by 4pyros
You need to do your turns ratio.

600ohms to 120000ohms

1 to 200 ratio

15 volts x 200 = 3000 volts

10. Determining the max voltage for Transformer

I'm planning to buy a radio transformer which is 150:40K 40K:150 ohm FS

http://www.ebay.com/itm/EI-14-Audio-...ht_1205wt_1187

I'm planning to magnify the DC voltage. However don't know what the maximum voltage the coil with less turns can handle. Is there a way to calculate that ? Looks like it's not stated in the description part of the product. I'm not familiar with transformers so I appreciate if you show me a way to calculate that for any transformer. Thank in advance.

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