Analog to Digital
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RPi Flight Simulator Interface
A Raspberry Pi running Linux with a custom I2C card and a small power supply provides an interface for a real-time flight simulator.
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DIY Pulse Sensor
A pulsemeter built with a Raspberry Pi, a digital-to-analog converter, and an optical sensor monitors your heart rate just as well as many far more expensive medical devices.
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Nerf Target Game
A cool Nerf gun game for a neighborhood party provides a lesson in Python coding with multiple processors.
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RFID over SPI
Inexpensive components for the SPI interface let you upgrade a Raspberry Pi 4 to a display system for zero-contact RFID-based data acquisition.
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PictoBlox
Block coding is not exactly new, but block programming of a microcontroller is more exciting than you might think.