chris k

Member Since: March 28, 2013

Country: United States


Entrepreneur by trade inventor by necessity. Not affiliated with SparkFun in any way; I am fanatical about things being of quality, and IMHO, SF is one of those things.

  • The LPCXpresso Board for LPC11C24 » OM13012 is about $20…

  • Or if you need enough RAM to process something tiny (but bigger than a Mega) get a ChipKIT uC32…

  • Just hooked mine up. WOW so easy! I removed the battery to solder it, so the time was 1-1-12 0:0 (or whatever) when I tested it (as I expected). I read through all the comments on here but I liked this guy’s example the best. Simple, easy, and got `er done. BTW, that link was http://arduinotronics.blogspot.com/2010/10/ds1307-real-time-clock-working.html

    The libraries are nice, but my project has more crap connected to it than anything I’ve seen anyone else do with an Arduino, so I didn’t want yet another include file. The above was nicely KISS.

  • I made a CAD drawing of this printer; you can get it on GrabCAD.

    I made it print somewhat quickly once I realize the stickers on the unit are relative to the controller (DCE) and not the device (DTE). :P

    Still haven’t figured out how to do bitmaps from within an Arduino (plot an array of INTs) … I’ll Github it once I do. The examples on the Net I’ve found all are not working for me. :P

  • That’s awesome, thanks! Their product says 1.5" diameter. I just put a piece of pipe 1.526" in diameter into my printer, fits perfectly. Paper is ordered.

    (8/7/2013) Edited to add: Yup, got it in today and this paper fits in the printer and prints great, too! :D

  • I buy and resell stuff from China because it’s better quality than stuff available to resell that’s made in USA. Even wires, which disappointed the patriot in me.

  • Mine works and I love it, so I bought another. It’s hooked up like as shown on this forum post. Oh no, maybe it works because I’m feeding it to Arduino stuff with voltage regulators? I think I’m lucky because I didn’t confuse the 4 pin molex with “oh use this instead of the PSU in a computer”, rather as “oh goody, I can chop wires of computer crap and use this to power my Arduino project!”

    Thanks to all the hate on here, I’ll see what I can do to kill the 2nd one I just bought (because I’m so happy with the 1st one).

    PS - I just created a CAD drawing of this; it’s on GrabCAD

  • I am very happy to share that this board is not only easy to work with but also I want to definitively state that hooked up as shown in my forum post, when ENABLE is high, current through the stepper motor stops. This is quite important for my design, as the system is idle for the majority of the time and does not need to hold position. Further, I didn’t do ANY thing to engineer or match the voltage supply to the stepper; I just wired the 12V to the Easy Driver motor input and fed the 5V to the Arduino.

    This is EASY!! and I thank you for that. This board is the 1st time I’ve been able to microstep a stepper. I’ve tried everything else out there. Oh, and FYI, accelstepper library breaks if/when you diddle the ENABLE. So someone will need to code a way around that.

    BTW: be sure among the 1st things to test once it’s working is the current. I thought it was odd my stepper got so hot. Turns out on my v44 board, the potentiometer and silk screen are again not in agreement. Upside: even with it at max current of 0.44A, none of the ICs on the Easy Driver got warm. With the POT now at full CCW, current is 0.22A. Pics are in the forum thread.

    I really wish THIS was the first motor driver I purchased. I’ve wasted countless hours and >$100 on other things, when this simple solution was right here. SF, you’re the first stop when I shop!

  • Hi Jessey, pots don’t really lend themselves to the thinking behind stepper motors… however, you could put the pot on an ADC input and then in the loop, change direction / speed based on the value. Would be easy-ish to subtract A0 from 512 and the speed be the distance away from 512 and the direction whether above or below. BUT, still ,there’s the issue of number of steps… kinda goes more to a joystick input where up or down changes number of steps and left or right the direction??? :D

    ImHO, pots work more for continuous running motors like to vary speed. My application for a stepper is to plot the performance of a throttle position sensor… a potentiometer if you will. Step 1 degree, stop, check voltage on ADC, repeat for ___ degrees or until ADC value doesn’t change. :) Chris

  • Ha – or DE-STA-CO toggle clamps. :D

No public wish lists :(