Reply To: Only one valve at the time.

Forums General Questions and Comments Only one valve at the time. Reply To: Only one valve at the time.


Power to the valves come directly from the power input not via the buck converter. Assuming all the valve ports work, and also assuming 12v or 24v valves, 18V is not an ideally voltage to use and means the valves will draw more current than they should. This would lead me to suspect the power supply.

Output from the buck converter goes to the Arduino only. Power goes to the VIN pin which connects to the Arduinos onboard regulator and 13v is a little too much (I think it is spec’d at max 12v). Bring it down to around 8 or 9v.

Have a look at the circuit diagram; bottom right hand corner. This shows the power in circuit.