The controller is actually just an ATTiny2313, running of it’s internal RC oscillator at 8MHz, soldered onto an universal board with a few resistors and wires. There are no control items - no buttons, no nothing. It just does what it does - makes the effect of LEDs randomly fading in and out using 9 channels of PWM. Unfortunately, the processor has only a few hardware PWM channels, so some of the channels had to be done by software.
With this small board you can program most of the AVR ATTiny microcontrollers or you can build your projects to use it in a stand alone application. It can be powered with a 9V battery because it has 5V voltage regulator on it. The voltage regulator can give 1000mA current. The power to the board can also be supplied with a wall wart. Low power external devices like a LCD module can be powered via the board itself.
The circuit contains 2x TRW-24G modules, 1x AT90S2313 microcontroller and 1x MAX202 TTL to RS232 voltage level converter. When you power-on this circuit, the AVR it will configure the IC1 as receiver and IC3 as transmitter. I’m not gonna give you any more technical specifications because they are well documented on the authors page. I say you give it a try when you need to setup a wifi connections between AVR’s.
Experimenting Wireless Comunications With AVR ATtiny2313:[Link]
The brain of this project is an AT90S2313 that controls the LED Display thus showing the temperature read from a DS182 temperature sensor. The temperature sensor chip, DS1820 is connected to PD1 with a 4.7k pull-up resistor. The circuit presented here uses only one sensor, but you may tie multiple sensors on the same line and modify the program to read it with the help of internal chip ID.
This really sounds like a cool project, and may be used in various projects where the temperature needs to be kept under control. The temperature controller is based on an AT90S2313(ATtiny2313) and a Dallas DS1621 Digital Thermometer. The temperature is displayed on a dual 7-segment display, and two buttons are used for setting parameters. A high current relay switches the heating element. The displays are common cathode displays. The segments of both displays are tied together and multiplexing is handled in software. Note that the decimal point segment also are used.
