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Connector choice and current-carrying capacity of wire
The "send" source would just be the power rail supplying the LED anodes.  The returns would be individual per LED, at a max of 120mA each, for 16 LEDs.  So the power...
Thursday, 18 December 2014 - 15:03
Connector choice and current-carrying capacity of wire
Ah-ha.  That figure of 200mA per pin is useful.  I don't think I can assign 10 pins to handle the 2A needed :(  Will do more research on header pins etc (after...
Wednesday, 17 December 2014 - 00:00
Connector choice and current-carrying capacity of wire
Hah, I already have the layout to handle that as well :)  The problem is lack of space on the LED board.  For example, for a car center taillight, there is barely enough...
Tuesday, 16 December 2014 - 16:15
Connector choice and current-carrying capacity of wire
Well, the tlc5926 can handle up to 17V on the power rail supplying the LEDs, and only needs a little over the LED forward voltage (1.5V I think, have to check) to work.  So,...
Tuesday, 16 December 2014 - 03:40
What's your most expensive electronics mistake?
I was 14 and built a darkroom in the bathroom under the stairs. It was a little warm and stuffy from the enlarger lamp, so I appropriated Mum's old hairdrier and pulled it apart...
Thursday, 6 March 2014 - 03:42
Fan speed monitoring
Colin O'Flynn did a really nice fan flowrate failure detector a while back. It was in Circuit Cellar, though I don't recall which issue, and circuitcellar.com doesn't appear to...
Sunday, 4 August 2013 - 01:50
Product wish - ddr3 based ramdisk pciE card
Brutte wrote:Quote:A pciE card like I'm envisioning could probably be designed by a bunch of people here Never heard about making high throughput expansion cards in here. I mean...
Saturday, 27 April 2013 - 02:04
USB Options
Bit-banging is fine. I did a large 120-LED clock using a 2313, bit-banging the connection out to two MAX7219 drivers. That handled the clock and all LEDs with visible resolution...
Thursday, 25 April 2013 - 20:52
Product wish - ddr3 based ramdisk pciE card
There is a difference between using ram for a system and using storage. For example, a large market segment for FusionIO is for databases, both tables and logs. The company I...
Thursday, 25 April 2013 - 13:34
Can ATmegaxXXU2 supply 3.3V to AT45DBxxx dataflash
Why do you need resistors on CLK/MOSI/CS ? The inputs are 5V tolerant. See page 47 of datasheet - "All inputs (SI, SCK, CS, WP, and RESET) are guaranteed by design to be 5V...
Friday, 5 October 2012 - 19:17
Can ATmegaxXXU2 supply 3.3V to AT45DBxxx dataflash
I thought they were 5V tolerant ?
Friday, 28 September 2012 - 15:48
Recommendations for dual-feed switching regulator
Yup - want to run the LEDs from as low a voltage as possible. Power is sourced via high-side P-fets, and controlled via a TLC5916 (on/off and constant-current). To minimize the...
Wednesday, 4 July 2012 - 02:57

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