LimiFrog- A STM32-L4 based wearable device with bluetooth and sensors

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Xavier Cauchy introduces LimiFrog– an ultra-compact, Bluetooth-enabled, and multiple sensor-packed development board based on the powerful STM32-L4 microcontroller. The board weighs less than 25 grams and features a 160×128 color OLED display, 8MB data flash, 500 mAH LiPo battery, USB connectivity, and lots of sensors, which include temperature, pressure, light, sound, accelerometer, gyroscope, and magnetometer.

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Arduino Mini weather station

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Matej Blagšič posted instructions for building a Bluetooth-enabled Arduino-based mini weather station that can measure ambient temperature, pressure and humidity. The main question is why did I/we choose the Seeeduino V4. If we were going for a cheap Chinese alternative, we could have gone with Funduinos or anything like that, as the Seeeduino is only a few bucks cheaper. The answer is the features. I see it as an upgrade to the Arduino Uno. It has all the features labeled with arrows. Some are subtle like the micro USB port, as many of us have smart phones that uses the

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DIY USB power meter stick

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Electro-Labs has posted a new project about making a DIY USB power meter based on Atmega328 processor. It sits between the USB port of the computer and the USB device to be connected to monitor the USB output supply voltage and the current drawn by the USB load device. The computed power consumption is displayed on a small OLED on the board. The USB meter stick itself gets powered from the USB port. The board is built around an Atmel ATMEGA328 microcontroller. To make the circuit as small as possible, the MCU is used in minimal configuration. Internal 8MHz oscillator is

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Controlling servos with hand motion

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Justin Platz and Kurt Clothier from Pubnub illustrates how to control a physical object with the motion of two hands. They used Raspberry Pi and the Leap Motion controller for this purpose.   The two servos mirror the movement of the user’s two individual hands. Attached to the servos are 8×8 RGB LED Matrices, which react to each finger movement on your hand. The Leap Motion communicates directly with the Raspberry Pi via PubNub Data Streams with minimal latency, and the Raspberry Pi then drives the servos. Leap Motion is a powerful device equipped with two monochromatic IR cameras and three infrared

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