DIYbanter - View Single Post - Need 12 volt ac to 24 volt ac transformer

Tim

In article ,
says...

wrote in message
...
On Wed, 25 Apr 2007 21:57:41 GMT, Tim wrote:

In article ,
says...
On Wed, 25 Apr 2007 14:18:20 GMT, put finger to
keyboard and composed:

Hi I need to convert 12 volts ac to 24 volts ac for an outdoor
lighting project low amperage, say 500 ma. I am looking for a small
boosting transformer on the cheap. Any suggestions on where I can find
something like this? Alternately I could use a cheap 12 volt ac to 24
volt dc converter. Google has turned up endless garbage for me.

Thanks

Here's a voltage doubling rectifier:

D1
o-----|--||-----|-----o +16V
| _|_ +
12VAC | --- C1
rms | |
o----- )---------+-----o 0V
| _|_ +
| --- C2
| D2 |
|--||-----|-----o -16V

The unloaded output voltage is around 33V, but under load you may get
closer to your target.

- Franc Zabkar

OR you could get one of those 220 to 110 travel adaptors and wire the
110 side to 12 VAC and get 24 VAC out the other side.

- Tim -

That sounds the the perfect idea.

Thanks

I rather think not, as the power rating of such an item is highly unlikely
to be anywhere near the 300 watts or so that you require. At 24 volts, that
equates to more than 12 amps ...

Arfa

300 Watts? He said 500ma right? 24V x .5A = 12W (roughly)

- Tim -