×

SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

mikeymike

Member Since: June 30, 2010

Country: United States

  • just bought 2 of these. I tested one of them on the breadboard by following john4’s link http://itp.nyu.edu/physcomp/Labs/DCMotorControl and it worked great. after that I took my second chip and soldered it onto a proto board, but it only goes forward regardless if the signal sent to the A pins are high and low or low and high. I doubled checked everything and I THINK I connected everything correctly. could this be a bad chip?
    edit just found out what was wrong. I used an adruino pro mini for my project and when I did a test on my circuit the arduino tilted in a wierd angle so not all the pins were touching. anywho after I soldered down the arduino and everything is working.

  • hi,
    I was wondering if you guy can help, I was able to accidently fix my problem but dont exactly understand how. I was able to hook up a avr atmega16 and create a blinking led with the internal rc clock. I follow the schematics on this article by using a Crystal 14.7456MHz external clock and connect it to the xtal2 and xtal1 which each pin of the clock are connect to a 22pf capacitor (fyi the capacitor has a print of “220” on one side and the other side has “k2j”). I connect both capicator to ground. when I change the lfuse to 0b11101111, it stop working. BUT if I disconnect the clock from ground it started WORKING!! is this the correct way to connect the clock and did I do something wrong? also I notice that the picture of the breadboard in the article connected the clock without connected it to ground as well, but I check multi sources and the schematic always connects the cystal clock to ground
    thanks for the help

No public wish lists :(