From Stepper Motor power supplies, a deleted link-only answer contained some useful links,
I provided an answer on Stack Exchange 3D Printing site, to a question relating to an extruder stepper not operating correctly, Extruder stepper motor problem, what can be wrong?
I have replicated the question and answer below.
In an attempt to answer the question on StackExchange Arduino, What type of connector does the GROVE system use?, and after looking up the Grove system, I contacted the technical support team at Seeed. I promptly had a reply, and below is the information that I received.