When connecting the pump driver board to an external DC source, you should choose a power supply rated for the same voltage as the voltage rating of your pumps. The current rating of the supply should be at least 20% higher than the total current consumed by the pumps at their peak power operating point.
I am assuming you want to use FlowIO with a set of arbitrary pumps of your own choice. Here are some things to keep in mind when selecting the power supply given any arbitrary pump. The current consumed by a diaphragm pump is lowest when the pump is operating in steady-state under no load. At full-load, the current consumption is significantly higher. However, somewhere between those extremes, there is a steady-state operating point with an even greater current draw. Use that highest point of steady-state current draw as a guide for selecting your power supply's current rating. The highest current consumed by a pump is the inrush current, which can be significantly higher than even the peak steady-state operating current. That's why you must have at least a 20% safety factor to ensure that your power supply can handle this transient inrush current without burning out in the process.
When connecting the pump driver board to an external DC source, you should choose a power supply rated for the same voltage as the voltage rating of your pumps. The current rating of the supply should be at least 20% higher than the total current consumed by the pumps at their peak power operating point.
I am assuming you want to use FlowIO with a set of arbitrary pumps of your own choice. Here are some things to keep in mind when selecting the power supply given any arbitrary pump. The current consumed by a diaphragm pump is lowest when the pump is operating in steady-state under no load. At full-load, the current consumption is significantly higher. However, somewhere between those extremes, there is a steady-state operating point with an even greater current draw. Use that highest point of steady-state current draw as a guide for selecting your power supply's current rating. The highest current consumed by a pump is the inrush current, which can be significantly higher than even the peak steady-state operating current. That's why you must have at least a 20% safety factor to ensure that your power supply can handle this transient inrush current without burning out in the process.