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Bit Twiddle Stick
rsbohn
14:25h
Wondering what to do with that accelerometer? Build a twiddle stick. It has two buttons, 8 LEDs, and a wireless link. When it is up, the LSB is on. When it is down the LSB is off. Press the 'shift' button and it shifts the LSB up one. Get all 8 LEDs set the way you want, then press the 'send' button. Or forget the send button, add a second accelerometer and twist the stick to send. This makes entering data more like conducting music. Maybe there is a second idea here: put the accelerometer on a conductor's baton and see where that takes you. (LSB is least significant bit) ... Link
Audible Packet Sniffer II
rsbohn
11:13h
Looks like Atmel may have the hardware to build this device. http://robots.net/article/2185.html The Audible Packet Sniffer listens for certain packets and 'rings a bell' when the desire packet is detected. It also measures overall network utilization and reports that using a 'background' white noise. The Atmel NGW100 includes two ethernet ports and a stereo DAC. This gives an incredible flexibility for the sniffer. It could play back sound clips from an SD card instead of ringing a bell. You could have a client program that would set up packet filters and turn the background on or off. The client would just upload the data to the sniffer over tcp/ip. I gotta get one of these! ... Link
'Talking' Voltmeter
rsbohn
15:32h
Create a voltmeter that will read a voltage and report it in morse code (either regular 5 symbol morse or 4 symbol BCD). Then I can connect it to my solar projects and keep track how the charging is going. Use the A-to-D converter on an Atmel AVR, and some code to send the morse signal to a beeper or piezo speaker. Add a switch to alternate between standard morse and the 4bit stuff. ... Link |
8140 days of detection
mod: 12/3/08, 5:42 AM days of detection... PMOG owner
BiographyRandall Bohn lives in Orem, Utah, USA. He works as a Software Quality Engineer. He is a big fan of the AVR line of microcontrollers. He has been in the computer industry since 1989. Randall is married and has three children. rsbohn can be reached via gmail.com. status
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Arduino Starter Kit
MAKE Blog How-to Tuesday posted a challenge: Optimize the sketch code for a pressure sensor bar graph. Here is my second attempt: int gate[] = {10, 20, 50, 100, 200, 32767}; void setup() {DDRB = 0b00111110;} void loop() { int dval = 0; int rval = analogRead(2); for (int x = 0; rval... 12/3/08, 5:42 AM Measuring Supply Voltage
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I'm building a project using the AVR ATMega8 microcontroller. Once I got the thing wired up to where I could write firmware to it I found that it was always failing. I made a .hex file full of 0x10 values (256 bytes worth) and tried uploading that to the chip.... 5/16/08, 2:56 PM William's Arduino Board
I'm building an Arduino-compatible board for William. I'm building it on the Evil Mad Scientist MegaXX8 business card. It will have four built-in LEDs and a USB interface. It will also have connectors so he can use it with a breadboard. Perhaps we can connect it to some of his... 5/15/08, 7:26 AM Cybord Signal Detector
Some digital radio signals use Frequency Shift Keying (FSK). This often has one frequency for a Mark and one for a Space. I plan to build a cybord or other chip that will decode an FSK signal, producing three different values: NO_SIGNAL, MARK, and SPACE. The signals would then go... 5/15/08, 7:20 AM destinations
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