I didn't think that the small amount of voltage difference should matter but I was not sure, because I know when you try to power something with a lower voltage it tends to over-heat. Thanks in advance.
2006-09-15 02:50:34 · 6 answers · asked by paintballer_1312 1 in Science & Mathematics ➔ Engineering
Yes, I think it will work fine. However, just as important is the amount of current that the device draws and the power supply can deliver. If the device draws 0.5 amps and the power supply can deliver only 300 milliamps (0.3 amps), the power supply's voltage will drop BELOW 7.5 volts and the device will not run properly.
However, if the power supply can deliver the right current, then there should be no problem from the 9-volt supply. Just in case, keep a close eye on the device to make sure it works properly and is not getting too hot. If it gets hotter than normal with the 9-volt supply, you'll need a different supply.
2006-09-15 03:03:31 · answer #1 · answered by pvreditor 7 · 2⤊ 0⤋
As one answerer put it, check it often to see it doesn't overheat. But with the proper adaptation and precautions, it should be doable.
Check the amperage rating and ensure that the amperage isn't exceeded when you use the 9v adapter. You can stick an additional resistor in line with your item to reduce the amperage if need be. Make that a variable resistor, start with max resistance (near zero amps) and reduce it until you get the rated amperage.
By the by, I think you misspoke when you wrote "because I know when you try to power something with a lower voltage it tends to over-heat." Higher, not lower voltage, for the same amperage, will cause your unit to overheat. Q = I^2R = EI; where Q is energy (e.g., heat, light, motion), I current, R resistance, and E volts.
2006-09-15 14:27:00 · answer #2 · answered by oldprof 7 · 0⤊ 0⤋
If the item is an electronic gadget, you have to reconsider the use of 9V power source. In case it is a toy please go ahead as the higher voltage will certainly reduce the current rating and the operation will be bit faster. Any how check the ampherage of both the devices. If the product of voltage and current of the power source is less than that of the item you have do not use it.
2006-09-15 10:14:12 · answer #3 · answered by rags 2 · 0⤊ 0⤋
1. It depends on the item.
2. There is a very good chance this will work fine.
3. Of the items this does not work on, mostly you will be able to tell it's not working properly before something blows up. Either the item overheats or runs too fast or other strange results.
4. There are a few items this could cause catastrophic failure, in the form of a blown fuse or fried components.
2006-09-15 11:09:16 · answer #4 · answered by semdot 4 · 0⤊ 0⤋
I'd assume putting 9V into something that was designed for 7.8 can't be a good idea.
2006-09-15 10:00:18 · answer #5 · answered by tgypoi 5 · 0⤊ 0⤋
IF YOU ARE DRINKING 2 GLASS OF MILK IN ONE DAY ,IF SOME BODY SAYS TO DRINK 10 GLASS WHAT WILL BE THE RESULT? THINK YOUR SELF
2006-09-15 10:01:12 · answer #6 · answered by Nikhil 1 · 0⤊ 1⤋