Nerdrobin

Member Since: October 7, 2008

Country: United States

  • Product COM-12694 | about 3 months ago

    A blast from the past indeed. I remember reading through an old 1981 Radio Shack cross reference guide and seeing this item. I was most intrigued by one of the application examples they had where they used this IC to drive the rows and a 4017 decade counter to drive the columns of an LED matrix. The 3914 would be configured in dot mode You’d then feed a clock into the 4017 and an analog signal into the 3914 forming a LED matrix oscilloscope. By cascading more 3914s and 4017s you could increase your resolution. I can’t imagine the quality being great, but I’ve always wanted to build one.

  • News - Check out the Lumapad! | about a year ago

    Am I missing something or is the source only open if you donate? I have been interested in doing high power LED designs and would love to see the schematics for the LED driver circuits used in this project, but I was unable to find them anywhere on the Kickstarter page or the Lumapad page. The only way I could see to get them was to donate $50.

  • Product PRT-11496 | about 2 years ago

    Assuming my maths are correct and also assuming this is 100% efficient, it will take about 27.4 hours to charge using just solar and 7 hours over USB. Again these are theoretical times and not anything actually measured.

  • Product CAB-11304 | about 2 years ago

    I would also like to know this. My mom has an embroidery machine that uses a serial device to write to its memory card. So far none of the cheap-o USB-Serial adapters have worked and I think it is due to lack of hardware flow control. More info or a datasheet would be greatly appreciated.

  • Product DEV-11117 | about 2 years ago

    I recently purchased the Teensy and saw that same issue. My solution was to solder the headers for that one row of pins facing up and then using the M/F jumper wires to go where I needed on my breadboard.

  • Product COM-10260 | about 2 years ago

    For those who are interested, here’s a video I made with three of these strips around the ceiling of my apartment. I am using an attiny2312a for generating the PWM. The outputs are connected to a RGB LED amplifier for high current driving. These amplifiers make this easy since they have optoisolated inputs which allow a low current drive of the high current outputs. The light output from three of these strips is enough to light my apartment to a very usable level, especially when all three channels are on full giving white.

  • News - March Caption Contest | about 2 years ago

    What do you mean I can’t eat it? You said there were chips in this box.

  • Product BOB-10835 | about 2 years ago

    If they are the same size as the ones used in laptop keyboards, these might fit: http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&cs=19&sku=PH102&baynote_bnrank=1&baynote_irrank=0&~ck=baynoteSearch

  • Product SWG-08339 | about 2 years ago

    I believe these are only compatible with the LilyPad Arduino and require these electrodes for a proper human/hoodie connection.

  • News - Maker Faire Time Lapse an… | about 3 years ago

    Looks like the artist was floundering for ideas.

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