N8VEM Single Board Z80 Computer

January 10, 2009 by Eliot 17 Comments

n8vem

The N8VEM is a homebrew computer project based on the classic Z80 microprocessor. It’s designed to be easy to build using large TTL DIP components instead of SMD devices. It runs the CP/M operating system and all drives are virtual in RAM/ROM. While the base hardware is interesting, we really like the potential for expansion using a backplane. Have a look at the project’s Hardware Overview to see extra boards like the bus monitor and the prototyping board. We found out about this project on [Oldbitcollector]’s blog; he’s using a Parallax Professional Development Board to create a VT100 terminal for the N8VEM.

Propeller Halloween Contest Winners

November 3, 2008 by Caleb Kraft 6 Comments

[youtube=http://www.youtube.com/watch?v=TkUSjf0U-GU]

Meet Skelly, the propeller powered singing skeleton, winning entry to the Unofficial Propeller Halloween Contest. Sick of the massive amounts of Arduino projects floating around the web, [Oldbitcollector] offered a halloween challenge. Make something spooky using a propeller and other parallax stuff, win a prize. Skelly, made by [Chuck Rice] was the star of the show, so [Chuck] will be getting some USB development boards in the mail.

Coyote-1 Guitar Pedal Available Now

August 26, 2008 by Eliot 3 Comments

OpenStomp’s Coyote-1 is now available for $349. The guitar effects pedal lets users design and upload their own effects to the device. It has two stomp switches with LEDs, an LCD display, and four user assignable knobs. The back has 1/4″ in/out and one selectable 1/4″. It also features NTSC composite out, a headphone jack, mini-USB for uploading, and an RJ11 I2C bus for expansion. The processor is a Parallax Propeller Chip. While the OS on the pedal is open source, the hardware design and effect design software are not. You can check out the source and product manual on their forum. If you’re more interested in breadboarding hardware, you might like the Beavis Board we covered earlier.

[via Create Digital Music]

Wii Style Controls For The Commodore 64

July 5, 2008 by Eliot 2 Comments

[youtube=http://www.youtube.com/watch?v=C1WOoPV_7HU&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999]
[Jeff] has been playing around with Parallax’s Propeller chip. He’s used it to adapt an NES controller to the to the Commodore 64. In this latest iteration though, he’s added a Memsic 2125 dual axis accelerometer to the end of a whiffle ball bat and used that to provide Wii style controller input. The video above shows his son playing Street Sports Baseball with it.

Propeller Based UAV Helicopter

August 17, 2007 by Will O'Brien 11 Comments

I guess we’re on a UAV kick – I ran across this one when I was looking for interesting propeller projects. [Glenn]’s building this one based on a R/C helicopter he picked up. Both the controller and the heli recieved a propeller chip, along with a pretty standard array of navigation sensors for the heli. It’s a work in progress, but sometimes those are the most inspiring.