Hello, this is my first post on the Arduino forum. I am working on a project that involves controlling a 12V 6W ball valve with Arduino. The valve has three wires: ground, open, and close. [ec_ard_valve_wires] I want to use MOSFETs or Transistors instead of relays to switch the power to the valve,…

You need the circuit with P CHANNEL MOSFET, the circuit on the TOP RIGHT of @JohnRob 's schematic, the one with M4 . N channel may run hot.

[image] rabie3150: The valve I am using is this one: [12V DC Electric Ball Valve]. It has a motor that rotates the ball 90 degrees to open and close the valve. It also has two limit switches that indicate the position of the valve. Your diagram ONLY shows three wires. Not nearly enough wires…

I Simplified it by using only 2 pins from the valve initially. If the circuit functions for the opening, I'll replicate it for the closing pin. The valve's built-in limits handle the fully open and closed positions, so there's no need to modify my circuit for those positions. [-1089790832-10572554…

Hi, @rabie3150 Welcome to the forum. Can you please post a link to specs/data of the valve? The diag you show, uses mains AC, AC is the usual method to control these valves, so 12V AC current may be needed. 12V, 6W means the motor will load up to; Power = Voltage x Current ... Current = Power…

Hi @TomGeorge , Thank you for your response. I wanted to clarify that the valve I’m using operates on 12V DC, not AC. I appreciate your help and look forward to any further suggestions you might have. Best, rabie

How much current does the valve motor require? Do the limit switches stop the motor at end of travel or only give an indication?

Your diagram will not provide more that about 4 volts to the valve. The voltages are: Vout of Pin 11 can be no more than 4.5 volts (likely less). The voltage drop of a transistor from base to emitter is about 0.5V (or more). Therefore the emitter voltage can be no higher than 4.5 - .5 or approx …

Since you have NPN transistors, you could use 2X the fourth (upper right) circuit in @JohnRob 's schematic with P-channel MOSFETs in the 2 to 5 Amp range.

[image] rabie3150: The valve's built-in limits handle the fully open and closed positions, so there's no need to modify my circuit for those positions. Then there is no feedback, so your Arduino never can know if the valve is open or closed until after it actually does an open or close comman…

[image] rabie3150: I wanted to clarify that the valve I’m using operates on 12V DC, not AC. So what are the polarities needed to drive the valve open and closed? [image] How to get the best out of this forum IDE 1.x See also FAQ - Arduino Forum for general rules on …

How to control a 12V ball valve with Arduino and MOSFETs?

Projects General Guidance

Paul_KD7HB February 11, 2024, 1:17am 2

Your diagram ONLY shows three wires. Not nearly enough wires to operate a motor and also have two limit switches that indicate the position.

Topic		Replies	Views
Controlling a three wire Ball Valve with Arduino and Mosfets (?) General Guidance	6	927	May 5, 2021
Controlling a valve with 0-6 V regulation General Guidance	47	344	March 1, 2026
Arduino powering a transistor with a relay Motors, Mechanics, Power and CNC	41	1675	August 3, 2024
Issue controlling motorized valve with switch General Guidance	10	840	May 5, 2021
How to connect a motorized valve with this circuit to Arduino General Electronics	6	235	December 14, 2024

How to control a 12V ball valve with Arduino and MOSFETs?

Related topics