need help with transformer

AC-DC Adapter, Transformer, Lipo battery and charger, SLA, Cell battery.....

Re: need help with transformer

Postby tekiding » Sun May 13, 2012 11:23 pm

so its not possible to integrate between the two thing...thank for the opinion
so back to the tens cct,how about the the ferric ring,this is it right?
http://malaysia.rs-online.com/mobile/p/ ... e/6441788/


so for both 17t and 44t use wire SWG 30??

from the link u gave me,i see they only use ordinary wire right?and then can it replace the transformer from my cct? if can,do i need to do adjustment/add resistor and transistor to the cct diagram connection?
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Re: need help with transformer

Postby ABSF » Sun May 13, 2012 11:57 pm

Yes, the ring should be OK.

SWG30 wires should be ok for both coils. It is not so critical.

The picture that I showed you is just an example. It was for the joules thief project. They are not the same project as yours.

Allen
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Re: need help with transformer

Postby tekiding » Mon May 14, 2012 12:45 am

thanks you so much..,actually i think my idea is more like the vibrating watch http://www.hearmore.com/store/prodList. ... ng_Watches but instead using vibration,i wanna use stimulation..

then for my transformer,is it different if i wind the wire wire to the ferric with or without the cover/insulator?
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Re: need help with transformer

Postby ABSF » Mon May 14, 2012 5:57 am

The SWG are insulated enamelled wires.

Allen
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Re: need help with transformer

Postby tekiding » Mon May 14, 2012 7:20 am

thank you..now i willbuy all the thing i need and make it...,any progress/problem i will update..thank allen :mrgreen:
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Re: need help with transformer

Postby tekiding » Tue May 15, 2012 3:51 am

dear allen... :?:
i want to ask your opinion whats the different between this three product and which is suitable for my project?
http://my.element14.com/jsp/search/prod ... ku=1784173
http://malaysia.rs-online.com/web/p/fer ... e/2618934/
http://malaysia.rs-online.com/web/p/fer ... e/2120976/

thank you so much :D
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Re: need help with transformer

Postby ABSF » Tue May 15, 2012 6:30 am

tekiding WROTE:dear allen... :?:
i want to ask your opinion whats the different between this three product and which is suitable for my project?
http://my.element14.com/jsp/search/prod ... ku=1784173
http://malaysia.rs-online.com/web/p/fer ... e/2618934/
http://malaysia.rs-online.com/web/p/fer ... e/2120976/

thank you so much :D


First 2 are OK. The third one is too big. Just pick the cheapest one will do.
Since you're not doing a booster converter for heavy loads, I dont think the ferrite ring would get saturated so easily. So using expensive ring would not get you any better performance, just a waste of money.... :mrgreen:

Allen
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Re: need help with transformer

Postby tekiding » Thu May 17, 2012 2:01 am

thank you for that opinion..yesterday i go to electrical shop to find the copper wire for the transformer,i ask for the swg 30..,but the guy in the shop said "i only sell,any detail im not sure,and not sure about swg or awg..,what i know the smallest size is 29" since only that shop sell the copper wire with the small size..so i bought it coz i also not sure..haha hope the picture i attached is right..coz its not a biggy if size 30 or 29 right?
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2012-05-17_01-53-03_708.jpg
copper wire size 29
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Re: need help with transformer

Postby ABSF » Thu May 17, 2012 6:46 am

Make sure that it is insulated. Measure it with an ohmmeter X1 scale that it doesnt conduct when touches probes on the skin of the wire.

Looks Ok but you have to wind it carefully not to break the ferrite ring. After winding , scratch the ends with a knife or use sand-paper to remove the insulation before soldering.

Allen
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Re: need help with transformer

Postby tekiding » Thu May 17, 2012 10:07 am

im a bit confused about this insulation you talking. the picture i attached, from my from 4eyes :shock: ,it look the same.., so i dont understand
ABSF WROTE:Make sure that it is insulated. Measure it with an ohmmeter X1 scale that it doesnt conduct when touches probes on the skin of the wire.

Looks Ok but you have to wind it carefully not to break the ferrite ring. After winding , scratch the ends with a knife or use sand-paper to remove the insulation before soldering.

Allen


thank you and sorry
Attachments
z.jpg
picture from previous project
z.jpg (60.48 KiB) Viewed 5470 times
x.jpg
ferric ring + copper wire
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