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March 1, 2013
about 6 years ago
Hi! I'm trying to control these leds (12 in total) with an arduino pro mini 3.3V 8Mhz powered by a LiPo Battery (3.7V 1100mAh) . I'm using Adafruit Neopixel Library on digital pin 4 but they turn up blue and stay that way. I tried the same strip on a typical 5V arduino uno and works perfectly (so the connections are not a problem) . It's about voltage, right? I'm connecting the v+ input of leds to the raw pin where I have the battery connected. Curiously, I also have a 12 leds strip of these ones: https://www.sparkfun.com/products/13282 and they work perfectly on arduino pro 3.3v 8Mhz . Is there anything that I can try or just consider moving to SMD? Thanks!
about 9 years ago
Hi, regards from Argentina. I have my Sparkfun USB Host translating USB MIDI to Standard MIDI. I use a nanoKey to play my Monotribe (both from Korg) using both Oleg and Yuuichi Akagawa libraries. Everything OK with this. But I connected a Korg microKey 37 and the shield doesn't even power it up. I tried to conect just data and GND to USB HOST and power it from an external source and nothing either. Any experience out there using USB MIDI controllers with this shield? Any suggestions? Thanks in advance! Jorge