Relay Shield for Arduino V2.1 with Arduino Ethernet
aut 2014-07-01 12:05:04 7496 Views8 Replies I recently bought 4 relay shields. I was wondering what is the maximum number of relay shields that can be stacked?
I understand that the Ethernet module reserves Digital pin 10/11/12/13. This leaves me with 9 pins. Is there anyway to control the 4 relay shields with the Arduino Ethernet?
Thanks!
I understand that the Ethernet module reserves Digital pin 10/11/12/13. This leaves me with 9 pins. Is there anyway to control the 4 relay shields with the Arduino Ethernet?
Thanks!
2014-07-08 01:24:27 Yeah, it should be compatible with Mega.
But I am not sure whether the power supply could support so many relays at the same time.
The jumper caps are ph2.0, it is a little small for ordinary jumper cable. What is about soldering?
Grey.CC
But I am not sure whether the power supply could support so many relays at the same time.
The jumper caps are ph2.0, it is a little small for ordinary jumper cable. What is about soldering?
Grey.CC 2014-07-05 16:01:50 Two more questions. ;D
1) Is the 'Relay Shield for Arduino V2.1' compatible with Mega?
2) Where can I find the jumper wires? The 4 jumper caps seems to be smaller than the standard 0.1" female headers
Thanks again! aut
1) Is the 'Relay Shield for Arduino V2.1' compatible with Mega?
2) Where can I find the jumper wires? The 4 jumper caps seems to be smaller than the standard 0.1" female headers
Thanks again!
aut 2014-07-04 21:25:24 Mega will definitely help. Mega often means more available PINS ;D
You will need a pack of jumper wires as well Jose
You will need a pack of jumper wires as well
Jose 2014-07-04 08:07:20 Sorry for the confusion. I meant 56 switches with 14 relay shields for the second part of my project.
aut
aut 2014-07-03 23:06:07 14 should be OK, 8 Digital pins + 6 Analog pins should be enough in your project. Grey.CC
Grey.CC 2014-07-03 11:40:41 Hello,
Thanks for the quick response. I am using the relays to control a bunch of switches over the internet. I will eventually need 14 relay shields. For the first part of the my project, I am trying out with only 3 relay shields.
What do you guys think is the better way? Get more Arduino boards and control the relays separately. Or to use Arduino Mega?
Thanks again aut
Thanks for the quick response. I am using the relays to control a bunch of switches over the internet. I will eventually need 14 relay shields. For the first part of the my project, I am trying out with only 3 relay shields.
What do you guys think is the better way? Get more Arduino boards and control the relays separately. Or to use Arduino Mega?
Thanks again
aut 2014-07-02 00:01:02 You can use analog pins as digital pins, so you should be able to stack up a few shields. With the right wiring on the jumpers selector.. If you don't need the serial port, and need the extra pins should not be a big deal to use them. But you can't expect any Serial.print feedback like that. Jose
Jose 2014-07-01 19:15:34 Welcome Aut,
As Ethernet board has occupied D10~13, so the empty pin should be D2~9 (It is not a good idea to use D1&D0, they are Serial port), and Analog 0~5. So it will be 14 pins in all. So the maximum could be 3.
How many relays do you want to control?
There are 4 jumper caps on the shield. they select 4 digital IO pin for control(Default digital 2,7,8,10) , you could take them off, and connect other pins to relay connect pins.
Do you want to make remote control system? Grey.CC
As Ethernet board has occupied D10~13, so the empty pin should be D2~9 (It is not a good idea to use D1&D0, they are Serial port), and Analog 0~5. So it will be 14 pins in all. So the maximum could be 3.
How many relays do you want to control?
There are 4 jumper caps on the shield. they select 4 digital IO pin for control(Default digital 2,7,8,10) , you could take them off, and connect other pins to relay connect pins.
Do you want to make remote control system?
Grey.CC 