Nuts and Volts - August 2008

SMILEY’S WORKSHOP ☺

Bill of Materials

ITEM Supplier/PN ■ AVR Butterfly Digi-Key/ATAVRBFLY ■ CdS LDR Digi-Key/PDV-P9005-1 ■ Two 2x5-pin header Digi-Key/S7108 ■ Four-pin header Digi-Key/S71035 ■ Two-pin header Digi-Key/S71037

ITEM
■ 3” Wire AWG 22
■ 2.2K ohm
■ Two-AA Bat. Box
■ DB- 9 Female Ctr.
■ Green LED

Supplier/PN
Jameco/36792
Jameco/690742CG
Jameco/216119CG
Circuit Specialists/DE-09S
Circuit Specialists/
BAG-GREEN3MM

working okay by two methods.

A simple test is to turn the power off on the Butterfly and then WITH THE JOYSTICK BUTTON PRESSED TO THE CENTER, turn the power back on. Now each time you press the joystick button to the center, you should see a series of question marks (???????) in the Simple Terminal receive window. This is the Butterfly bootloader wondering what the heck is going on.

Another test is to turn the Butterfly on and click the joystick up to get the LCD scrolling. Move the joystick straight down three times till you see ‘Name,’ then move the joystick to the right twice till you see ‘Enter name.’ Move the joystick straight down once and you will see ‘Download name,’ then push down the joystick center for a moment until you see ‘Waiting for input.’

In Developer Terminal, make sure the ‘Send Text: Immediate’ radio button is checked. Type in your name, then in the ‘Send HEX Immediate’ dropdown box, select and click on 0x0D that tells the Butterfly you are finished sending characters. Your name should appear on the LCD.

This isn’t easy and there are many opportunities to mess up along the way. Many folks get this going right away, but others seem to have fits getting over this hurdle, so I’ve provided a Workshop 1 Supplement: Problems Communicating with the Butterfly (on www.nutsvolts.com) to help you get past this point. Trust me, if you see the or get your name scrolling on the LCD, you are over a major hump and subsequent workshops will be easier to get going than this step.

Well, that was a lot and we haven’t really gotten started yet. Next month, we will look at the software

side of the AVR Learning Platform and learn about the AVRStudio IDE and the WinAVR C compiler toolset.

We’ll write our first C program and create a set of Cylon Eyes in hardware. NV

The Standard for checking Capacitors in-circuit

Good enough to be the choice of Panasonic, Pioneer, NBC, ABC, Ford, JVC, NASA and thousands of independent service technicians.

Locate shorted or leaky components or conditions to the exact spot in-circuit

Still cutting up the pcb, and unsoldering every part trying to guess at where the short is?

$209

Your DVM shows the same shorted reading all along the pcb trace. LeakSeeker 82B has the resolution to find the defective component.

And with a 60 day trial period, satisfaction Touch pads along the trace, and LeakSeeker guaranteed or money-back policy, the only beeps highest in pitch at the defect’s pad. Now thing you can lose is all the time you’re you can locate a shorted part only a quarter of currently spending on trying to repair all an inch away from a good part. Short can be those dogs you’ve given up on. from 0 to 150 ohms