Hello everybody,
For a project with 4 RGB-strips, I want to control 12 5V relays like these:
But they draw 60mA each, that will burn my arduino.
The system will be build inside a promotiontrailer, powered by 12V-batteries.
I tried already with transistors but burned them (drawing to much current).
How can I solve this problem?
Greetings,
Dieter
Belgium
Make a separate 5v supply using a 7805 voltage regulator ?
...R
You should have bought 12volt relay modules.
Now you have to drop 12volt to 5volt (1Amp) with a separate relay supply.
You can use a buck converter for that, or an 7805 regulator as Robin2 suggested.
Note that a linear 7805 could dissipate ~7watt, and will need a heatsink when all relays are on.
A buck converter does not need a heatsink.
Power the relay modules with 5volt(+) on the JD-VCC pin (jumper removed) and relay ground.
Connect relay VCC to Arduino's 5volt pin, and the relay inputs to Arduino outputs.
Do_not_connect_relay_ground_to_Arduino_ground.
Power the Arduino (Uno?) with 12volt on the DC socket.
Leo..
thx for your answers guys,
I bought nothing yet, just the arduino and the already mounted led-strips.
So I can do whatever I want.
I didn't think about the choise that can be made with the jumper,
now it is clear to me, I will buy those:
kind regards,
Dieter
Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html
Can you post a copy of the circuit you tried?
Can you please tell us your electronics, programming, Arduino, hardware experience?
Thanks.. Tom.. 