Feeds

Vanilla (0.9.3) is a product of Lussumo. More Information: Documentation, Community Support.
Bottom of Page
Makers and Making: Arduino and Relay - Need help
  1.  
1 to 4 of 4
JEBariffic
Jan 21st 2013
Greetings!

Newbie here trying to get my Arduino to control a relay with no luck. I'm able to see the LED flashing on the relay board indicating that the relay SHOULD be throwing, but the circuit is not being closed. I'm wondering if its because the circuit on the relay is too low of voltage? I've got a 12 volt circuit. Here is the relay(s) I'm using:
http://www.amazon.com/gp/product/B0057OC5O8/ref=oh_details_o03_s01_i00

Thanks for the help!
alankilian
Jan 22nd 2013
Do you have some more information for the relay board?
Like a schematic?

Can you describe every wire you have connected to the board and where it goes?
JEBariffic
Jan 23rd 2013
alan, thanks for the reply. I've torn down the build. But I'm still thinking that the problem is that the relay wont work with a small current. The manufacturer's site I found (http://www.sainsmart.com/4-channel-5v-relay-module-for-pic-arm-avr-dsp-arduino-msp430-ttl-logic.html) states:

This is a 5V 4-Channel Relay interface board, Be able to control various appliances, and other equipments with large current. It can be controlled directly by Micro-controller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic) .

5V 4-Channel Relay interface board, and each one needs 15-20mA Driver Current

Equiped with high-current relay, AC250V 10A ; DC30V 10A

Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)

Indication LED’s for Relay output status

So again, my build had only 12V running through the switch and the LED indicator was, um, indicating... I'm thinking I need to run a 120V light or such thru the switch and see if that works.
alankilian
Jan 23rd 2013
You should be able to run ANY voltage through the contact-part of the switch.
For example, you could use the relays to switch two MP3 playey outputs to one set of headphones.

The relay should go "Click" when you GROUND the input, and the LED lights.

You need to provide 5 Volts DC to both VCC and JD-VCC on the 2-pin connector.

I bet you only connected to the VCC pin. That would light up the LED, but not the relay coil.
  1.  
1 to 4 of 4
Top of PageBack to Discussions