SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!
Frequently Asked Questions
Mon-Fri, 9am to 5pm
U.S. Mountain Time:
Chat With Us
December 18, 2012
Tutorial - Stepper Motor Quickstart Guide
about 2 years ago
Any stepper motor tutorial that doesn’t teach that there are unipolar and bipolar motors is mostly empty. Even more so when you carry both types.
I can understand you want to make a QUICKstart guide. But based on forum threads on stepper motor product pages, I can see most people have problem matching motors and drivers that you distribute. So we need a “selection guide” as much as we need a quickstart guide that explain neither motor types or driving current (or the mismatch between voltage rating of a motor and the voltage actually used to drive it through some driver).
Adding a warning that a stepper driver must not be disconnected while powered would be wise. Do you really expect readers to read the details of the driver if you give them a quickstart guide?
Have a look there: Jones on Stepping Motors
about 2 years ago
Details please. How long will it source 700mA at 5.5VDC? Battery is 2000mAh, but which voltage?
From charger datasheet, we can infer its a single cell.
Output is 5.5v, so we can infer it has a boost circuit. Where is the datasheet? What is the efficiency of said circuit?
Because I’d prefer a “1000mAh battery pack with 90% efficient boost circuit” over a “2000mAh with 40% efficient boost”, even if it looks less beefy…
To potential customers… do not assume this will give you 2 * 3.7/(0.7 * 5.5)=1.9 hours while draining 700mA.
No public wish lists :(
Forgot your password?
No account? Register one!