Member Since: January 30, 2009

Country: United States


Spoken Languages

English, French

Programming Languages

C#, C, Java, Processing


Duke University, University of Illinois at Urbana-Champaign


Software, Embedded Systems


news.ycombinator.com, petergebhard.com

  • Product LCD-00255 | about 3 years ago

    Any tips on getting the 4.2V for the backlight? A simple voltage divider circuit isn’t ideal because the load from the backlight.
    Is 5V gonna kill the backlight?

  • News - Copenhagen Suborbital | about 3 years ago

    I already found Part 2 on YouTube. :-D

  • Product DEV-09026 | about 3 years ago

    I feel like it would be pretty neat if Sparkfun sold a kit equivalent to this shield and that could be built at home. That might even help alleviate the frequency of out of stock manufactured shields or at least appease the masses who really want this shield quickly. I assume this whole device is open-source due to its association with the Arduino, right?

  • Product LCD-10168 | about 3 years ago

    I did the same thing (see my comment above), but I still can’t seem to get anything to display. 3 of the 4 backlight LEDs still light up when I give them power, but I’m wondering what joints you re-soldered to get it to work again.
    Also, I’m assuming it’s okay that there’s no diode on my board like there is shown in the product image. I guess other people’s boards are coming like that, too?

  • Product LCD-10168 | about 3 years ago

    I accidentally (well, intentionally, but stupidly) plugged the LED backlight line directly into 5V when I first got this, and I saw (and smelled) the magic black smoke escape. I believe the black smoke only came from one of the backlight LEDs burning out, because I only notice one of them not working now. The other backlight LEDs still light up okay, but I also now seem to be having trouble getting the display to show anything. I’m just wondering if I could have messed anything else up. It seems like others have had their issues with this display, so I was hoping I maybe had something misconfigured. I’m fairly certain I have the pins assigned properly, but maybe I’ll tinker with the contrast. Any recommendations for setting the contrast value?
    I’m using a Teensy 1.0 as a Teensyduino, and everything runs at 5V logic.
    Any ideas, tips, recommendations?

Name Pieces Total
Public Wish List
45 775.05
DIY Sous Vide
19 88.15
DIY Music Strobe Light
20 103.5
UAV Copter
2 16.9
XBee RGB IKEA lamp
0 0
Electronic Boutonniere
8 47.6