2006-10-30 05:13:40 · 3 answers · asked by opps 2 in Consumer Electronics ➔ Other - Electronics
On the DC side you need 25 watts, so the converter must be able to produce at least the same power on the AC side.
Since Power = Voltage x Current, you will need 120 volts AC * 0.2 amps (at least) to get 25 watts.
0.2 amps is 200 milliamps (mA). I would suggest a power transformer that can has an input rating of at least 0.3 amps to allow for a safety margin.
2006-10-30 05:34:42 · answer #1 · answered by Mark C 1 · 0⤊ 1⤋
25 watts at 12 VDC is just over 2 amps. Any 12 VDC supply that provides this should work just fine. If you use a slightly higher rated supply it doesn't work as hard and will last longer, so go with 2.5 amps or more.
2006-10-30 21:14:42 · answer #2 · answered by wires 7 · 1⤊ 0⤋
the question isn't watts...it's amps. look on the device, it should give a number either in A (amps) or mA (milliamps). this is the number you need to pay attention to. your ac/dc adapter should have a higher rating (remember 1000mA = 1A...so a 1.2A device is 1200mA)
2006-10-30 13:34:43 · answer #3 · answered by Jay Moore 5 · 0⤊ 0⤋