All posts in the 'AVR projects' Category
Posted on 08 Aug 2008
It uses only 4 chips - 3 HC TTL’s and an Atmel At90S2313 microcontroller. It has a 5 digit LED display plus one used as a band indicator.the current consumption is less than 50 mA.It counts up to at least 52 MHz.The schematic is quite straightforward. There are two major parts, the display multiplexing and the counter stage.[more]
Posted on 08 Aug 2008
The Lux Meter is usually used to measure illumination. The illumination is how level of luminous flux is falling on a surface area. The luminous flux is visible component that is defined in radiant flux (light power) divided by relative sensitivity of human eyes over the visible spectrum. This means the Lux is well fit to light level from sense of human eyes.[more]
Posted on 29 Jul 2008
This project is dedicated for AVR nerds who can not touch anything else but AVR chips.This board is functional copy of JUMA-TX1 DDS board done with Atmel Atmega88 microcontroller. Because of higher pincount serial(RS232) interface have been added to the board for PC communication. Surface mount version (MLF package) of Atmega88 chip is used. 6-pin Atmel ISP programming connector is added for in circuit programming. [more]
Posted on 29 Jul 2008
This small project demonstrate the Tiny family high speed PWM capabilities to produce a sinewave output. It was also incorporated functions to play Piano Key Tones using sinewave waveform, as a smooth and clean sound as the ones produced by cords.
The sinewaves produces are better in low frequencies. The high frequency keys need to jump over a larger byte quantity in the sine table, to be able to produce the correct frequency, it generates a high frequency component over the sinewave, and it may be noticeable on the sound speaker.The circuit consists of ATTiny13 and RC low-pass filter. [more]
Posted on 29 Jul 2008
The Æther (acceptably Aether) is a no-touch, tabletop gaming system. It uses eight ultrasonic distance sensing joysticks, two per player, to allow you to control what happens on the screen. The Æther was created at the Department of Electrical Engineering at Columbia University.[more]
