My question is, do i need any other hardware or will the Arduino work directly with that relay board. I know my arduino has 113 output pins, but this is a 16 Channel relay board.
MrKovacic:
Greetings... My first post and first decent project I plan to work on...
I have the Arduino Duemilanove ... I know my arduino has 113 output pins
It does? Most Duemilanoves only have 20.
Since those are 12V relays, you'll need a 12V power supply and a transistor to switch them on.
Yes, you can use the "Analog Input" pins as digital I/O.
So you have 14-2(for USB) = 12 plus 6 = 18 Digital I/Os.
Look at the connectors on the board you bought. There are two:
One goes to Arduino: 5V and GND, and the 16 relay signals to the I/Os. This drives only the logic part of the board, not the relay coils.
Second one needs 12V DC to operate the relays.
Other: This board has Optical Isolation (runs through opto-isolator chips). You need to check if the relays operate with a HIGH(1) signal or a LOW(0) signal. Many of this type of relay board operate on a LOW level so that you can guarantee that no relays will activate at power-on time.
Yes, you can use the "Analog Input" pins as digital I/O.
So you have 14-2(for USB) = 12 plus 6 = 18 Digital I/Os.
Look at the connectors on the board you bought. There are two:
One goes to Arduino: 5V and GND, and the 16 relay signals to the I/Os. This drives only the logic part of the board, not the relay coils.
Second one needs 12V DC to operate the relays.
Other: This board has Optical Isolation (runs through opto-isolator chips). You need to check if the relays operate with a HIGH(1) signal or a LOW(0) signal. Many of this type of relay board operate on a LOW level so that you can guarantee that no relays will activate at power-on time.
Excellent resource!! Thank you very much!! I had to put the project on hold due to a nasty broken hot water pipe behind a wall which required a few walls to be taken out. anyways I am checking out that page now.. Thanks again!!
