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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.
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If you like gardening but hate to keep up with the daily routines of watering the plants, you might be interested in this Arduino controlled gardening assistant, which monitors and controls the soil humidity and lighting level inside an indoor garden to ensure that the plants have favorable conditions for healthy growth.
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This fully-open digital wrist watch is designed by a group of employees at CERN as a special present for one of their retiring colleagues who likes hiking and timing. The watch features multiple sensor units including GPS, pressure sensor, 3D-accelerometer, compass, and ambient light sensor. A 128×128 pixels LCD with backlight feature is used for front display. The watch also provides a MicroSD card slot for storage. Powered by a 500 mAh Lithium-ion battery, the project uses Silicon Labs’ EFM32 Giant Gecko ARM® Cortex®-M3 based 32-bit microcontroller as its brain. [via: HackAday]
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Ajoy Raman’s new project on Instructable is about making a low-cost hand-held tweezers to meause R, L, C, and Z (complex impedance). The project uses the TI’s TMS320F28027 micro-controller, an 8-port-analog-switch ADG714 from Analog Devices and the MCP6022 rail-to-rail dual Opamp IC. The ZLRC measurements are sent to a PC through an USB port using an USB-to-TTL converter. He also developed a GUI application for the PC end to display the results.
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If your next Arduino project needs some kind of remote switching control, this DIY 433MHz RF receiver plus relay shield might be useful for you. It includes a 433.92Mhz RF receiver and four SPDT relays, which allows you to perform wireless control of the devices connected to the relays. Each relay is capable of switching up to 10A @ 250VAC mains power supply.
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