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ChronodeVFD: A wearable wrist watch with vacuum fluorescent display

Posted on October 27, 2014 by R-B Leave a comment

Vacuum Fluorescent Displays (VFD) are usually considered bulky, and are, therefore, mostly found in non-portable consumer-electronics gadgets such as DVD players, automobile audio system, and electric ranges. Johngineer’s ChronodeVFD is an exception to that. He used them to construct a wearable wrist watch. The ChronodeVFD uses the IVL2-7/5 VFD display tube controlled by the Maxim MAX6920 chip, which is a 12-bit output, 76V, vacuum fluorescent display (VFD) tube driver. The core of the project is the ATMega88 microcontroller and the DS3231 RTC chip. His design also includes an analog light sensor, a BMP180 barometric/temperature sensor and a MMA8653 accelerometer. The finished watch is powered by

Adding hardware media controller to your PC

Posted on October 26, 2014 by R-B Leave a comment

Keyboards with extra keys for quick multimedia control are a handy shortcut for geeks who love to listen to music while working on their computers. However, not all keyboards contain those extra keys. The Peng Multimedia Controller project is a DIY USB hardware device that provides shortcut keys for easy media control. It supports the basic media control features such as Next/Previous, Play/Pause and volume control. The project uses Atmega8 microcontroller which communicates with the PC through a software-only implementation of USB using V-USB. While push switches are used for Play/Pause and Next/Previous functions, a linear potentiometer is used for volume

Controlling appliances using text messages

Posted on October 14, 2014 by R-B Leave a comment

This GSM remote control project uses an AVR micro-controller (ATtiny2313) and the GM-47 GSM module to perform ON/OFF switching of remotely located devices through text message. It features four relay switches and eight digital inputs to monitor status of normal or reed switches. The SMS commands are password-protected.

Another IR controlled light switch

Posted on September 8, 2014 by R-B Leave a comment

Vadim Panov’s new project is about an IR controlled light switch that operates with any RC-5 compatible TV remote. His switch is built around the ATTiny2313 MCU clocked at 8MHz. The IR receiving part is designed for decoding the 36KHz modulated IR signal using the TSOP1736 device. The thing I came up with at the time was a light swich for my room controlled over an IR remote from TV. Remote that I had used RC-5 protocol, hence the firmware is suited for any RC-5 compatible remote. Everyone is familiar to the everliving problem with switching the lights off in your room

Autonomous fire extinguisher

Posted on August 10, 2014 by R-B Leave a comment

Trevor Slaton and Dawn Xiang, students from Cornell University, designed this autonomous fire extinguisher that is capable of detecting fires through photo sensors and aiming a water nozzle along two axes to extinguish the fires. Their prototype can detect and extinguish candle fires from about 1 ft. away. Their system uses two servo motors to control the vertical and horizontal position of the water nozzle and a water pump to send out a burst of water from the nozzle. The ATmega1284p microcontroller is used to control the pump as well as the servos.

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