Concept of Touch LCD LC7981 using ATMega An on/off controller is the simplest form of a temperature control device. The output from the device is either on or off, with no middle state. An on-off controller will switch the output only when the temperature crosses the set-point. For heating control, the output is on when the […]
On/Off Controller – Interfacing Touch LCD LC7981 using ATMega Microcontroller Read More »
Sometimes it’s tempting to re-invent the wheel to make a device function exactly the way you want. I am re-visiting the field of homemade electrophysiology equipment, and although I’ve already published a home made electocardiograph (ECG), I wish to revisit that project and make it much more elegant, while also planning for a pulse oximeter, an electroencephalograph (EEG),
Multichannel USB Analog Sensor using ATMega48 Microcontroller Read More »
Around time when I was beginning to learn about microcontrollers. I had exchanged my laptop with a senior at college for his desktop – that’s because the only way I knew how to program an ATMEGA chip was through either a serial port or a parallel port. USB programmers were not available widely and were
Making a USB based AVR Programmer using ATMEGA8 Microcontroller Read More »
History I decided to do this project for several reasons: Frst I like music, second I have a huge collection of MP3, and third I wanted to be able to play them anytime in my living room. I began the project with one major restriction. The printed circuit board of MP3 player MUST be single
MP3 Player using ATMega128 microcontroller Read More »
Driving a shift register using an AVR chip’s built-in hardware is really quite easy. Most of their offerings have an SPI module, or Serial Peripheral Interface. A shift register is exactly that, a peripheral device that communicates via a serial line. All we need to do is hook up our connections and use a few
How to drive 595 shift registers with AVR hardware SPI using ATmega168 microcontroller Read More »
Low power. EEPROM memory for autonomous operation, 16 bytes available for general purpose use. Low cost. This device provides three channels of 8 bit pulse-width modulation. Output pulse duty cycle ranges from 0 to 255/256 in 255 steps. DACs may be loaded by the DS interface. DAC values may also be copied into the on-chip
3 channel, 8 bit EEPROM DAC with DS interface using ATtiny12 microcontroller Read More »
The DS protocol was designed to provide firmware-based bidirectional host-to-slave inter processor communications for situations in which no hardware solution is available and the host and/or the slave in incapable of tending the interface in real time. The only specialized hardware required is two bidirectional I/O ports on each chip (alternatively two input ports and
DS interface test tool using ATtiny2313 microcontroller Read More »
Downloads Download the AVRStudio assembly source vlflo13041105A.asm (html format) Download the AVRStudio Hex file vlflo13041105A.hex (html format) Photo of completed receiver. Its pocket sized, but not intended to be used that way because the antenna is a highly directional ferrite loopstick. Its only a matter of luck that there was room for all the components
A Superhet/Direct Conversion AM receiver for 181.818 kHz using Attiny2313 Read More »
Downloads AVR Studio assembler source code 2jun2002version.asm AVR Studio hex file 232lin.hex This is an adapter that allows a terminal to communicate via a 100 MHz data channel with peripherals on the same desk top. Keystrokes from the terminal are are received through the RS-232 connection and sent through the 100 MHz RF data channel.
RS-232 to 100 MHz RF desktop channel adapter using ATtiny2313 microcontroller Read More »
Wireless data links don’t have to be difficult to build or adjust They can be built quickly using inexpensive and readily available parts. Overview This is a simple, low cost RF data link that can send data reliably over a distance of one to two meters, enough for bench top or desktop use. The data
Low cost RF for simple data link and remote control using ATtiny12 microcontroller Read More »
