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Design considerations for a wireless LED sign

Posted on October 22, 2014 by R-B Leave a comment

This application note from Texas Instruments describes the hardware design considerations for making a multi-sport scoreboard that is cost efficient, portable, easy to use, and support wireless transmission of display data. This application report describes the selection of the following: an appropriate LED display, a controller system, a communication system, and software for building the wireless LED-based scoreboard. Different techniques are included to drive the LED display from a microcontroller as well as some test results. This application report is only for displaying numerals on the scoreboard but the same concept can be applied to display alphabets. A similar concept can be extended to

Remote-controlled biped robot using Attiny85

Posted on October 22, 2014 by R-B Leave a comment

Max’s remote-controlled biped robot uses four servo motors for its legs and feet to go forward and backward. The Attiny85 microcontroller is used as its brain which receives and follows the motion commands sent from an infrared TV remote.

Audio record/play implementation using MSP430

Posted on October 21, 2014 by R-B Leave a comment

This application report discusses the implementation of a low-cost solution to store and play audio or using an MSP430. The reference design uses an external SPI flash memory, which enables flexibility of storage memory size based on the amount of playback time needed, while the low-cost MSP430F2002 MCU offers ultralow-power speech playback solution.

Arduino ukulele

Posted on October 21, 2014 by R-B Leave a comment

Ukulele is a small guitar-like musical instrument with four strings and has been a symbol of Hawaiian music for over 100 years. Simone Giertz has created a miniature version of it using the Arduino platform. The strings are made of conducting wires and work on capacitive sensing principle, whereas the ukulele-like sound is created through a piezo buzzer.

Digital blood pressure meter design using PIC microcontroller

Posted on October 20, 2014 by R-B Leave a comment

This Application Note from Microchip provides a reference design for building a non-invasive blood pressure meter using the PIC24FJ128GC010 microcontroller and MCP6N11 instrumentation amplifier. A digital blood pressure meter measures systolic and diastolic pressures by oscillometric detection. Microchip’s digital blood pressure meter demo can measure blood pressure and pulse rate during inflation. The Measurement While Inflating (MWI) principle reduces overall measuring time, which in turn reduces discomfort caused by the pressure in the cuff.

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