Maker Fair Mashup: G.R.L. LED Throwie + Cybords = Throwie Talkie

During the 2006 Maker Fair the Graffiti Research Lab was demoing their LED Throwies and Pat & Ward Cunningham were demonstrating Cybords. While talking someone made a comment about wanting to give the Throwies a voice. Ward & Pat took a simple ATtiny45 chip and added it to the mix to give the LED a voice. Computerized Throwie Demo

Step 1: Get the Supplies

You will need:
<ul><li>10mm Diffused LED
<li>Programed ATtiny45 Computer
<li>CR2032 3V Lithium Battery
<li>1/2" Dia x 1/8" Thick NdFeB Disc Magnet, Ni-Cu-Ni plated
<li>1-inch wide Strapping Tape
</ul>

For a more complete parts list see: LED Throwies instructables page

Step 2: How We Program the Chip

We program the ATtiny45 chip using this and Atmel Avr Tools.

morse.asm.txt
Download

Step 3: Bend the Leads

Bend the chip and LED leads to match.

We bent off the middle leads so that they wouldent get in the way.

Step 4: Solder the Leads

The chip is programed in a way that we can solder the LED leads right across the chip. The best way to solder them together is to hold one side with nedle nosed plyers and tap the other side with some solder.

The longer LED lead should be soldered to the 'vcc' (power) and 'rst' pins of the chip. This shorts the chip reset and gives it a more secure conection. Make sure to reference the wiring diagram in this step to get the pins correct.