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Help Do IT Yourself : Portable Rechargeable Mini car fan
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#1
Dear Folks,
when i visited my native i have noticed the frequent power failures and my child was not sleeping during the nights. I planned to make a rechargeable fan with the car mini fan. this will work in AC and DC
please find the attached snaps


gireesh
Side view : Battery and fan
[attachment=1327]

Snaps from front ( on off switch and recharging switch )
[attachment=1328]

Side view ( Battery, Transformer - (14-0-14 volt and 2 A for stepping down AC 230 volt to AC 14 Volt ), Center tapping rectifier with Diodes and capacitor ( for converting 14 v AC to 14 V DC)
[attachment=1329]

A close view of Capacitor and Diode ((Rectifier circuit - Full wave center tapping )
[attachment=1330]

A close view of UPS Battery (12 V 7.5 A)
[attachment=1331]

Bushes under Switch board for using over smooth surface like table and Tiles
[attachment=1332]

Photo of charging the battery
[attachment=1333]



Gireesh Kumar
Satellite Enthusiast
Indiandth.in
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#2
can we recharge battery that shown in images at home ownself or from outside
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#3
(04-19-2012, 06:36 PM)manissd Wrote: can we recharge battery that shown in images at home ownself or from outside

yes we can recharge it with the help of transformer shown in the image
just insert the AC cable and switch on the power. it will recharge from the transformer inside.
Gireesh Kumar
Satellite Enthusiast
Indiandth.in
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#4
Great Gireesh, Very nice and innovative idea.
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#5
(04-19-2012, 06:51 PM)vinay_kumar Wrote: Great Gireesh, Very nice and innovative idea.

thank you vinay.......the main advantage of this fan is 90 degree oscillation

thanks you
Gireesh Kumar
Satellite Enthusiast
Indiandth.in
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#6
what is transformer
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#7
(04-19-2012, 09:53 PM)manissd Wrote: what is transformer

good..... I will explain. At our home , most of the electrical appliances are working in 230 AC. But some of the devices are working in DC so we need to convert Ac to DC. Transformers are using for stepping up or stepping down 230 voltage. And working on the principle of electro magnetic induction. In this condition i have used a stepdown transformer. And it will reduce 230 ac to 14 volt AC. The diodes and capacitor will convert the 14 volt AC to 14 volt pure DC. This is a general explanation. Transformer is having copper winding and their will be two windings. Primary and secondary. When we connnect primary coil towards AC it will creat a mutual induction due to electromagnetic principle and generate voltage on secondary windings. The output voltage directoly proportional to windings of transformer. I can tell more if you require. Kindly ask . Now im at hospital i will replay on evening.
Gireesh Kumar
Satellite Enthusiast
Indiandth.in
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#8
(04-20-2012, 06:55 AM)GIRI PHOTOG Wrote: I can tell more if you require. Kindly ask . Now im at hospital i will replay on evening.

Thanks Giri for explaining this so nicely ... And yes Get well soon.



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#9
Its rpm is 2500
Gireesh Kumar
Satellite Enthusiast
Indiandth.in
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