hi,
i have truck switches with LED's in them wired parallel and they run at 24v. i have a 24v 1500mA power supply wired to them. now i want to turn on and off those LEDs with an arduino micro (only board i have). could i use a relay to this or is there an other way to do this without losing the voltage and amps? and how could i do this? i have never done this before.
best regards,
devon
You could use a relay or a transistor or a fet.
Google transistor as a switch
Could i use a "Transistor MOSFET DC switch Relay"? It says it can be used with 5v microcontrollers and can be used to switch up to 30 amps.
mgysgtdevon:
Could i use a "Transistor MOSFET DC switch Relay"? It says it can be used with 5v microcontrollers and can be used to switch up to 30 amps.
Dunno, you're the only one who knows what you're talking about. Do you have a link to whatever it is? It sounds like overkill but who can tell from just a name.
Steve
That will do the job. It's probably more than you need but if you don't want to be bothered putting together individual components then it should be fine.
Steve
take a few minutes to make a hand sketch and then post it.
there does not seem to be any reason it would not work for your needs.
but to make sure it works properly, you need to make sure your power for the Arduino is electrically clean.
thnx all for the advice, ill see when i can buy then and try them out 
A typical LED takes maybe 10 mA of current. You can use a small signal NPN transistor to switch them. BC546 or BC547 or something similar. Don't forget the base resistor, 1-10k will do just fine.