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.
Attiny85 biped robot
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.
Audio solution with MSP430
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.
Arduino ukulele
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.
PIC-based blood pressure meter
Check out this DIY LED matrix pong game, which is Arduio-controlled and uses a rotary encoder as input device and two 8×8 bi-color LED matrix boards for game display. The LED matrix displays are driven by MAX7219 chips.
Arduino pong game