Go Down

Topic: How to use Arduino to control a switch (Read 1 time) previous topic - next topic

jdjtbgs

I was wondering if it was possible to use Arduino to control switching on/off an LED strip that's powered by another source and also control its brightness. Most of the other examples I've found online require opto-isolators and things like that, just wondering if there is another way to do it without them. Thanks!

mdwsfc

I've got a similar challenge: using the arduino to control a switch connected to outside power.
For a school demonstration project, I have an Arduino Uno R3, a 24AC solenoid valve, and a Songle power relay 5V DC Dual Power Relay Module (SRD-05VDC-SL-C). I want to use the arduino to send an open/shut command to the valve to water a plant. The Arduino gets its 5 volts of power through a USB cable to a computer, but the valve is 24volts, alternating current, thus the power relay module. But the solenoid also needs an outside power source, right? If i wire the arduino to the power relay module, and then complete a circuit between the songle, solenoid and public power (220 volts), will it fry the arduino? Do I need some other hardware, or just some guidance in wiring this properly? Thanks!

Magician

Quote
just wondering if there is another way to do it without them

There is tutorial, using MOSFET's:
http://learn.adafruit.com/rgb-led-strips/usage

Go Up