| T O P I C R E V I E W |
| sanjeevrk |
Posted - Nov 02 2009 : 01:50:07 AM
Hi
i have got a DC fan (12V, 1.3A) and would love to use the same using AC power (220-240V), can you please tell me how i can run this using AC power, if possible the circuite for the same pls
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| 10 L A T E S T R E P L I E S (Newest First) |
| Darkthero |
Posted - Nov 04 2009 : 04:56:53 AM
oops i see i made a mistake sorry |
| Aaron Cake |
Posted - Nov 03 2009 : 09:28:24 AM
Yeah, transformers don't work too well on DC. 
If it is a universal type motor, it will also work on 12V AC, for what it's worth. |
| audioguru |
Posted - Nov 03 2009 : 08:25:57 AM
The rectifier is on the 12V side of the transformer so 25V or 50V rating is fine. |
| Darkthero |
Posted - Nov 03 2009 : 07:15:56 AM
well i said 300v because i never seen a 240v rectifier |
| pebe |
Posted - Nov 03 2009 : 07:10:45 AM
Darkthero,
The voltage rating of your rectifier is far higher than necessary. |
| Darkthero |
Posted - Nov 03 2009 : 06:42:41 AM
in the post ^above^ i think i meant 2amp will be fine for the transformer. |
| Darkthero |
Posted - Nov 03 2009 : 06:40:26 AM
I think i can answer that. what i would use is a 3or more amp transformer and a bridge rectifier rated at 300v 4amps. hope this helps |
| sanjeevrk |
Posted - Nov 03 2009 : 12:42:24 AM
thanks aaron cake and darkthero,
Aaron cake does this 12V transformer and a rectifier have any specific size? |
| Aaron Cake |
Posted - Nov 02 2009 : 09:48:03 AM
The easiest approach would be to use a 12V wall adapter with the appropriate current ratings. You can buy them cheaply at surplus stores.
Failing that, all you need is a 12V transformer and a rectifier. Motors don't particularly care how clean the supply is to them, so you don't need to bother filtering and regulating it. |
| Darkthero |
Posted - Nov 02 2009 : 04:56:26 AM
ok you cant directly plug your 12v to 120/240 because it will burn it up. what you can do is buy or make a adapter that will step down the voltage to 12v and regulate it to DC. something like this http://www.shopaddonics.com/itemdesc.asp?ic=AAPAC12V-US or if u want to make here is the schematic and discription http://www.allaboutcircuits.com/worksheets/supply1.html |
