| Amperes, volts, ohms, "blowing" electronic components... - Click HERE for Original Thread |
| Datoyminaytah |
I'm not sure which forum this is best for, but I'm asking in relation to a car amp.
I think I finally "get" the relationship between watts, amperes, volts, and ohms, but I want to make sure before I potentially fry something if I hook it up wrong.
If comparing electrical flow to water flowing through pipes...
volts = water pressure
ohms = restriction of pipe (e.g. diameter)
amperes = amount of water that actually flows (current)
I think this means, voltage doesn't "make" current flow, a high resistance could block it. You don't "apply" current, you apply volts, and current is "drawn" based on resistance.
Is that about right? If not, please enlighten me.
I think that means that you don't have to worry about supplying too much "current" to a component, right? You don't "supply" current, you supply voltage, and the component "draws" current based on it's resistance. Is that right?
OK, now my question:
For the 12 volt remote turn-on terminal of a car amplifier, which doesn't require much current, and has a much smaller connecting terminal than the 12 volt power terminal, would it be dangerous for testing purposes (testing the amp before installing it properly) to directly connect the remote turn-on terminal to the same wire as supplies the amplifier's power? Would that fry the amplifier? Would a resistor in series with this connection be required, or would that drop the voltage too low?
Still a little confused, and haven't been able to find this info anywhere. |
|
|
| li_gangyi |
| yes...you should be able to use 12V to trigger the remote... |
|
|
| trailsnail85 |
| yea you can use a peice of wire and run it into the terminal with the power wire and the amp will turn on. friend does this with a swicth on the jumper between the power and remote an uses that to turn on the amp. hes a to lazy to run a remote wire right. |
|
|
| DilutedImage |
| Correct ... The remote turn-on accepts 12v ... It will draw the current it needs. |
|
|
| xplod1236 |
| quote: | | Correct ... The remote turn-on accepts 12v ... It will draw the current it needs. |
Just out of curiosity, how much current does it usually draw (average amplifier)? |
|
|
| Immo_G |
| Should be under 200ma, and probably around 40-50ma. You can use thin wire for this, not sure why some amps have the 8ga spot for it. |
|
|
| Tensop |
Cost management
Cheaper to buy a 3 terminal 8 guage socket than a 2 terminal 8 guage socket and a 22 guage socket
:D |
|
|
|
|
