Arag valve rc15

Hardware Section Control
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Hi to everyone. I try set section control on my agromehanika sprayer. Sprayer have 7 section and use arag valve. In oem variant when i shut off one,two three… section pressure compensate this and give me constant flow. On my begining i try solder maschine board on button in cab to simulate press and switch on section but can’t change code to do that. Than i order rc15 board and try with it. Problem is in oem variant this valve has 2 pcb one in cab one on sprayer. In cab one calculate rate when section is off or on. Initialy i connect ampseal to relay board on sprayer where i have 2 wire to motor A side and B side from rc15. Then, rc15 dont react when 1,2,3…section is in sprayed area. When more of 3,5 section is out shut off all valve. I remove everything and try just with A side of relay to IN on this pcb(spayer side) but then oem controler need to be pluged in. What is best solution to do this. If anyone can help and explain rateapp. Will send few pic from sprayer side.

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This pcb needs 12v because when its have 12v from cab(valve is on) when its does not have 12v from cab its use 12v from this pcb and shut off valve.

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Typically you need:

  1. rc15 to handle valves, flowmeter …

  2. for reading the switches you need the SwitchBox from Rate Repo (simple nano v3 ).
    May be you can use the existing switches by using an optocoupler interface.

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I understand this part, but cant make rateapp to work with this valve

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The ways to control the valves

  • use section input of sprayer pcb without teeing switches from oem pcb. Use " PCA9685 Single" wiring and setup
  • disconnect valve from sprayer pcb (2 wires/section) Use " PCA9685 paired" wireing and setup

Switches from oem pcb can read by optocoupler to a SwitchBox, so Rate App gets the status.

What would you use from your existing OEM Controller?

1 Like
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Dont need oem controller, just think left it in function like backup

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First option you say will work. Pcb on sprayer just need 12v and gnd, and then use single for each section(but orginal conector must be disconected). Now i must ask can rc15 control pressure if i speed or slow down or if i switch few section. And why you mention optocoupler? Can rc15 read what is on or off from agopen?

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Yes, RC15 should control the flow. You have to connect the flowmeter and the proportional valve. Speed / Section switches comes from AOG. You set your target flowrate and RC15 controls it.

If you are happy to operate sections from AOG Screen you don’t need any external switchbox.

You can use an external Switchbox (based on Arduino Nano V3) like SK21 has it in his Rate repo.

If you want to use your oem controller switches, (from disconnected plug) you can use an optocoupler module which converts the signal level (12V to 5V) for Arduino Nano V3 to read it into AGO / Rate App.

1 Like
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Thank you, now i understand