Posts tagged ‘ATMega328’

Building a Wireless Temperature Sensor

I have built quite a few (1,2,3) temperature measurement circuits in the past, but none of those has remote sensing capability. So I decided to make a wireless temperature sensor so that temperature measurements can be made anywhere within the range of the transmitter and the receiver. Continue reading ‘Building a Wireless Temperature Sensor’ »

Building an Auxiliary Display

I wanted to be able to check my web server’s statistics periodically but did not want having to log on ever time when I wanted to do so. The simplest way to achieve this is to have the computer monitor on and run a server statistics program that outputs the information onto the screen. Continue reading ‘Building an Auxiliary Display’ »

Arduino Serial Using LT1780

Most of the recent Arduino and compatible boards use some kind of USB to UART hardware (e.g. FT232RL in Arduino Duemilanove and Atmega8U2 in the latest Arduino Uno) for interfacing with computer USB ports. Since ATmega328 has native UART support, building an Arduino that interfaces with the serial port (RS232) directly is arguably much easier. Continue reading ‘Arduino Serial Using LT1780’ »

A Dual Temperature Display With Humidity Measurement

I built a digital thermometer a couple of weeks ago. This thermometer uses an LM19 sensor calibrated for measuring a wide temperature range (-55 – 130 Celsius, -67 – 266 Fahrenheit) for outdoor temperature measurement and an SHT21 digital thermometer with humidity measurement for indoor use. Continue reading ‘A Dual Temperature Display With Humidity Measurement’ »

A Sensitive DIY Ultrasonic Range Sensor

I needed some ultrasonic range finders for my project. But most of the commercial sensors like Parallax’s PING sensor and other similar products are quite expensive, especially if multiple units are needed. So I thought why not building it myself? Continue reading ‘A Sensitive DIY Ultrasonic Range Sensor’ »

Digital Metronome

It is fairly simple to build a digital metronome using an ATmega328 AVR chip and some minimal programming using the Arduino libraries. The main challenge though is to display the tempo information conveniently. Continue reading ‘Digital Metronome’ »