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Old July 9th, 2017, 10:32 AM
stinggray stinggray is offline
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Join Date: Sep 2006
Location: Jupiter, FL
Posts: 104
4 of 8 relay board

I'm making a mosquito spray system and want to control it with HS. I believe the best way to control 12v valves and pumps would be with a relay board. Does anyone have a suggestion on a relay 4 or 8 relay board that either has a plug-in or can be controlled by script?
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Old July 9th, 2017, 10:39 AM
stinggray stinggray is offline
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I was looking at this board any input?

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Old July 9th, 2017, 01:11 PM
Switchdoctor Switchdoctor is offline
Join Date: Feb 2017
Location: Texas
Posts: 32
The serial relay board would certainly work, but it is going to require script writing and lots of coding to control it and poll its status.

I use the ADIO-100.
VERY reliable.
(not extremely fast, but we are talking valves right...)

It has 8 outputs. (voltage outs-suited for controlling "stuff")
I use the outputs to trigger the input channels on a (8-ch ARDUINO Relay Board)
(there is also 8-input channels on the ADIO-100, perfectly suited for valve feedback if desired)

12volt relay board is best, and power the relay board from the unregulated terminal of the ADIO-100.

(actually mine is much more complex and uses 10 ADIO-100's)

But that's all you need.

What type of valves you using> The cheap motorized 12vdc valves on ebay or aliexpress are superbly compatible. But there are two types of valves:
1. reverse polarity to open/close
2. voltage present opens, closes when voltage is removed.
(uses internal ultracap to power during closure)

You would find option 2 easier and cheaper to implement.
(option 1 requires DPDT relay board, and lots more electrical knowledge)

FYI:: read my post concerning ADIO-100' s before you implement programming for it, otherwise you may be faced with unpredictable operation during rebooting pc.
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Old July 9th, 2017, 06:52 PM
Broes Broes is offline
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Join Date: Apr 2013
Location: The Netherlands
Posts: 81
And a relay board on top of an Arduino?


With the Arduino plugin the coding is not that hard.

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