[Sprite_tm] sent us his latest project. He has found a way to display custom messages on a laserjet printer without a computer. He’s using an ATTiny2313 to send signals through a parallel port. This project is so cheap and quick to install it could be disposable. Just program your message before hand, pop it on and walk away.
[jelengar] liked the ease of use of the Arduino, but wanted a much higher pin count. He set about converting the ATmega Controller for use with Wiring, the code that the Arduino IDE is based on. The ATmega128 in the controller features 53 pins as opposed to the 11 on the Arduino’s ATmega168. You also get 128kb of memory. The process is fairly simple; you just need to add the appropriate crystal. You can also add a switch to trigger the bootloader and a status LED.
Make has assembled a buyers guide for the many different types of Arduino devices. The Arduino is an open hardware platform designed to make prototyping easily accessible. The design allows for other people to modify, expand, and improve on the base, and many people have started producing their own versions. The guide features a lot of the hardware we’ve covered in the past like the LilyPad, Arduino Pro, Sanguino, Duemilanove, Ethernet Shield, and Freeduino.
Out of the pack, the Seeeduino (pictured above) definitely caught our eye. It’s a low profile SMD design much like the Arduino Pro. They’ve taken advantage of the space saved by the SMD ATmega168 by adding more useful headers. In addition to the ICSP, you get the pins in UART order and an I2C header. Vcc is switch selectable for 3.3 or 5volts. The reset switch has been moved to the edge plus two additional ADC pins. Our favorite feature is the new spacing on the digital pins. Arduino digital pin headers have an inexplicable 160mil gap between the banks. The Seeeduino has the standard row for shield compatibility, but has an additional row spaced at standard 100mil spacing for use with protoboard. At $23.99, it’s competitively priced too.
Adafruit has just put their Uzebox based console into production. The Fuzebox is an 8bit game console based around the ATmega644-20PU microcontroller. Full 256 color 240×224 resolution video output is provide by either a composite connection or svideo. There is an SD card slot on board for future expansion. The chip takes care of all the I/O, so you just need to write your game code in C on top of it.
The kit looks easy to assemble. Almost all of the components are through-hole. The video chip is SMD and comes presoldered to the board. The kit has two SNES controller ports included, but you can use NES ports too. There are three ways you can load your program onto the board: 6pin FTDI, ICSP10, and ICSP6.
[Anupam Pathak] knows how jarring it can be to wake up to a traditional alarm clock. He decided to hack an alarm clock so that it would open the shades in his room to allow in natural light. He found the pin that went high when the alarm was triggered and used that to signal an ATtiny45. The microcontroller activates a servo connected directly to the blinds. He has switches on the side of the clock to manually control the blinds and to cut power to the audible alarm. Video embedded after the break. Continue reading “Alarm Clock Automated Blinds”
In a previous job, [sprite_tm] was responsible for wrangling many different LED text ad marquees. The hardware was fairly simple and he always figured they could be pushed much further with a little work. He recently acquired ten 32×16 LED displays a decided to see what he could do with them. By the end of the project, he had full motion video running on the display. This is a great project to read up on if you’ve ever wondered about LED matrix displays. He starts by reverse engineering the electronics on the board. He then attached an ATmega88 to drive the display module. Multiple display modules were daisy chained together over serial. The article covers PWM control and refresh timing as well. Check out one of a few demo videos below. Continue reading “Overhauling LED Marquees”
Evil Mad Scientist Laboratories has updated their business card AVR breakout boards to version 1.1. We suspect the changes will probably make them even more popular. The boards are designed for the ATmegaXX8 family of microcontrollers. The center has all 28 pins labeled while either end has a prototyping area. An in-system programming header is also provided. For the new version, both prototyping areas have been increased to accommodate DIP14 packages. The holes for the microcontroller are now larger so that they can hold a ZIF socket. Finally, the power and ground traces have been expanded. We’ve always like the versatility of these boards, as demonstrated in the Tennis for Two project, and can’t help wondering if these updates were made to facilitate another project.
