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76  Forum 2005-2010 (read only) / Interfacing / Re: External Power supply for 15 TLC5940 for LEDs on: October 20, 2008, 04:31:10 am
If you have an external power source plugged into the Arduino, you might be overloading the voltage regulator by drawing too much current through the +5V line.  If you have 5*16 LEDs, this is 1.6A! of current.  You could try powering all the LEDs from the external power supply directly: hook the positive legs of the LEDs to the "VIN" pin on the Arduino.
77  Forum 2005-2010 (read only) / Interfacing / Re: Using 10 of TLC5940 in control on: October 12, 2008, 04:21:25 pm
To use multiple TLCs in series, hook SOUT (pin 17) of the first TLC to the SIN (pin 26) of the next TLC, and so on.  Try downloading the latest library (TLC5940LEDv006.zip at this point).  Then run the examples, but change the #define NUM_TLCS at the top to however many TLC's you have daisy chained.
78  Forum 2005-2010 (read only) / Workshops / Re: Any intererest in a Seattle area workshop/hackfest on: October 06, 2008, 06:21:35 pm
I would organize myself but I'm afraid I don't have enough time.  I'll ask around.
79  Forum 2005-2010 (read only) / Workshops / Re: Any intererest in a Seattle area workshop/hackfest on: October 06, 2008, 02:40:14 pm
I would be up for a workshop / hackfest.  I'm an EE / CSE student at UW and I think there would be a lot of interest from undergrads who want to get into microcontrollers.  Also, the DXArts (digital arts) department uses Arduino for all their mechatronic art/courses, so we may be able to get some experienced people to give talks.
80  Forum 2005-2010 (read only) / Exhibition / Re: Nintendo Controller Keyless Entry System on: December 09, 2008, 02:29:16 am
Very cool!  Nice instructable too.
81  Forum 2005-2010 (read only) / Exhibition / Keyless Entry System Using the Arduino on: October 18, 2008, 11:39:41 pm
I made a keyless entry system with an Arduino, servo, and a capacitive touch sensor.  Touching a wire on the outside of the door with the right pattern turns the door knob on the inside (this opens the door if it's locked from the outside).

The project page with more info:
Keyless Entry System Using the Arduino

The Youtube video:
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