Posted on 29 Jul 2008
This is a simple signal generator which produces sine waves (or any waveform really) at audio frequencies using DDS and is controlled a USB serial connection.Only 2 chips are used in this circuit. The AVR ATmega88 which produces the signal, and an FT232R for the USB interface. While a computer is required to control the varying frequency of the oscillator, a fixed frequency project could be made without the USB interface.[more]
Posted on 17 Jul 2008
The NanoVM is a java virtual machine for the Atmel AVR ATmega8 CPU, the member of the AVR CPU family used e.g. in the DLR Asuro robot, manufactured by AREXX engineering. With the NanoVM, the Asuro can be programmed in the popular Java language using the standard Sun JDK. The NanoVM and its tools are distributed under the GPL and can be used on other AVR based systems as well.[more]
Posted on 06 Jul 2008
The “Butterfly keyer” program converts the Butterfly demo board into an Iambic keyer which can decode and display the characters you send using the paddle. The Atmel AVR “Butterfly” is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.[more]
Posted on 15 Jun 2008
Built from a modified AVR development board manufactured by Olimex, Pass Key is a sweet little 5V “candy bar” style computer that can generate 16-digit alphanumeric passwords as fast as you can press a button.The original AVR-MT dev board requires 10-14V, but with a little circuitry magic, this power demand can be sliced to a scant 5V without losing any of the display, buzzer, LED, button or computational capabilities of the original dev board.[more]
Posted on 08 Jun 2008
This circuit can replace a dot matrix LCD with a TV set. Show your ASCII data on TV instead of an LCD, with resolution of 40 characters x 25 lines.[more]
