Milliamp Question

[bluesky11]

Hi all

Is it okay to use a 6 volts 1000 milliamp DC power supply with a device that says it needs 6 volts 200 milliamp?

[Hero999]

Yes, the device will take as much current as it needs, research Ohm's law.

[bluesky11]

Hi,

Thanks for your reply Hero999, but i am still not clear.

A friend of mine says that giving 1 or 2 amphere to a device that need 200 milliamp will burn or damage  the circuit/ICs of that device.
is it write?

I am new to electronics.

Thanks

[indulis]

You said you had a supply rated at:

... 6 volts 1000 milliamp DC power supply...

You said your load is only 200mA.

Your supply is more than adequate for your load.

[audioguru]

You cannot "give" extra current to a circuit that uses only 200mA.
The extra current is available and is simply not used.

If the circuit is a dead short then it will use all the current that is available.

[bluesky11]

The extra current is available and is simply not used.

ok that means it is no problem to run 200milliamp device with 1 amp power supply because the device will take 200 milliamp from 1 amp and work properly.
write

[Hero999]

The amount of current that actually flows depends on the resistance and the voltage of the supply.

I = V/R

Where I is the current, V is the voltage and R is the resistance.

The power supply will have a current rating which just specifies the maximum amount of current it can safely supply.

If the device is rated to 12V and the supply is 12V it will work fine, it will adjust its resistance to draw the amount of current it needs.

Don't listen to your friend, from the sounds of it he doesn't know any more than you, he just thinks he does.

[Hero999]

Why bump a three month old thread?

I often find that there are plenty of people who talk a load of rubbish and think they know what they're talking about.

You're right of course about unregulated supplies but I can't see how, someone who has asked such a simple question, understanding the concept of voltage regulation.