New Tactile Sensor Is Lighter Than A Feather
Many researchers are focusing on flexible electronics, but the ones coming out of Someya-Sekitani Lab are the thinnest and most flexible circuits to date, the researchers say. (They have aptly nicknamed their work “imperceptible electronics.”) The sensors can conform to almost any 3-D shape. They’re also resilient, the research team says: the sensors maintain functionality up to 170 degrees C (though beyond 100 degrees C their efficiency gradually tapers off); they’re nearly unaffected when immersed in saline solutions; and they can be crumpled up, flattened back out, and even placed on rubber and stretched out–none of which drastically impacts performance.
New Tactile Sensor is Lighter Than a Feather - [Link]
janw @ instructables.com writes:
I have something with the weather. I always like to know how warm or cold it is, how much rain has fallen, how hard the wind blows and from what direction,… and so there are lots of sensors around our house to keep me up to date. These sensors give only a limited range of data, so I still need the internet to inform me about everything I want to know.
LED wind indicator - [Link]
janw @ instructables.com writes:
A few months ago, I saw an instructable by fjordcarver on how to build a coloursensor with an RGB led and an LDR. It inspired me to try whether I could improve his design.
Here are the things that I wanted:
The sensor should have as few pins as possible.
It should work as a stand-alone device. All calculations should be done on the device.
It should have a triggered mode and a continuous mode.
All parameters should be programmable.
Calibration parameters should be stored in the EEPROM of the microcontroller.
Firmware updates should be made possible
And finally: size does matter ⇒ The smaller the better.
I did choose an smd attiny85 as the brain of the sensor. It has a small footprint but a large enough flash for the calculations. It also has just enough pins for the project (all eight pins are used).instructables.com
Build your own (at)tiny colour sensor - [Link]
A small, low cost USB-capable Inertial Measurement Unit with open-source software. For electronics projects, robotics and UAVs
Thalamus is a small board containing a USB-capable 32-bit 72MHz ARM Cortex-M3 microcontroller, 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer and barometer.
Thalamus started out life as a flight controller for the R10 Quadrotor systems, providing stabilization at 400Hz. However, packing a fast microcontroller with native USB capabilities, and with two SPI ports for communications, Thalamus is a perfect low-cost IMU board for robotics projects, as well as PC-connected applications.
Thalamus IMU – Motion sense/control board for your projects - [Link]
Maxim announced that it is now sampling the MAX31850/MAX31851, cold-junction-compensated, 1-Wire thermocouple-to-digital converters. The devices achieve ±2.0°C accuracy (not including sensor nonlinearity) while integrating all of the functions required for a complete thermocouple-to-digital solution. Additionally, the device’s 1-Wire interface allows multiple sensor locations to communicate and draw power over a single data line, greatly simplifying wiring requirements. [via]
1-Wire Thermocouple-to-Digital Converters Simplify Multisensor Designs - [Link]
A light meter is a device that measures the intensity of light. It finds applications in schools, hospitals, production areas, passageways and more to measure and maintain proper lighting levels. It is often used by photographers to determine the proper exposure for a photograph. Today we are going to build a simple light meter using an Arduino board and a BH1750 digital light sensor. The measured lighting level or intensity is displayed on eight seven segment LED displays, in both Lux and Foot-candle units.
Building a simple digital light meter using Arduino and BH1750FVI sensor - [Link]
The Imec and Holst Centre has presented a large-area, fully organic photodetector array fabricated on a flexible substrate. The spectral sensitivity of the sensor array makes it suitable for x-ray imaging applications.
The very high absorption coefficient of organic semiconductors allow extremely thin active layers (10 to 50 nm) to be used, and the low processing temperature allows these layers to be deposited on foils. As a result, organic sensors can be more robust and lighter than their conventional counterparts, and conformal coating of substrates with any desired shape is possible. A wide range of available organic molecules also allows the properties of the active layer to be tailored to applications requiring specific spectral sensitivity ranges. [via]
A Really Flexible X-ray Sensor - [Link]
Chirp is a plant watering alarm – you put it into the soil near a plant and it emits a tiny chirp when the soil is too dry, reminding you to water the plant. Different levels of moisture can be set by pushing a single button. There is a light sensor on board, so the widget does not make noise at night. Chirp uses capacitive humidity sensing – this means no rusted electrodes and no soil electrolysis.
Chirp! – the plant watering alarm - [Link]
Kasbah posted his Nomech mini project, a 4×4 projected capactive touch board using Atmega32u4 and back-fire LEDs for each button:
It fits SoB 100x80mm but the top acrylic will sit right on top of the PCB as the dielectric properties of whatever is touching the electrodes matters a lot. If this works well then I might scale it up to 8×8. I want it to work as a cheap monome replacement without using mechanical buttons; hence the name “nomech”.
Nomech mini, a 4×4 capacitive touch button grid - [Link]
Infineon Technologies has released a family of 3D image sensor chips for touchless gesture recognition. Developed in cooperation with pmdtechnologies, the new chips are the first to combine a 3D image sensing pixel array with the digital conversion and control functions needed to develop very compact and accurate systems for gesture recognition applications in computers and consumer electronics devices. [via]
Image Sensor Recognizes Gestures - [Link]