PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don’t wear out. For that reason they are commonly found in appliances and gadgets used in homes or businesses. They are often referred to as PIR, “Passive Infrared”, “Pyroelectric”, or “IR motion” sensors.
Embedds has posted this useful project for making an ultrasonic voice-based sensor.
Everyone must have seen those creepy parking sensor that are attached to a car back and gets activated when the driver puts the reverse gear. The sensors sends out the ultrasonic waves and detect the distance and notifies the driver when the distance is too less. It’s a similar project built by using an Arduino and a HC-SR04 ultrasonic sensor which are popular sensor to detect proximity. Apart from it uses an audio shield which has pre stored audio messages that has spoken value between 10-100 cm with a resolution of 5cm.
The audio signals or the voice signals are stored on an onboard SD-card which is integrated in the Audio shield and also has support for Audio output. It’s typically designed to use with as a parking distance. Overall an excellent project which utilizes the audio shield to full extent but integrating it real time can be little tricky and will depend heavily on type of vehicles. However this type of project can be used in AGV’s with a little modification.
NEW PRODUCT – CAP1188 – 8-Key Capacitive Touch Sensor Breakout – I2C or SPI – Add lots of touch sensors to your next microcontroller project with this easy-to-use 8-channel capacitive touch sensor breakout board, starring the CAP1188. This chip can handle up to 8 individual touch pads, and has a very nice feature that makes it stand out for us: it will light up the 8 onboard LEDs when the matching touch sensor fires to help you debug your sensor setup.
The CAP1188 has support for both I2C and SPI, so it easy to use with any microcontroller. If you are using I2C, you can select one of 5 addresses, for a total of 40 capacitive touch pads on one I2C 2-wire bus. Using this chip is a lot easier than doing the capacitive sensing with analog inputs: it handles all the filtering for you and can be configured for more/less sensitivity.
Comes with a fully assembled board, and a stick of 0.1″ header so you can plug it into a breadboard. For contacts, we suggest using copper foil, then solder a wire that connects from the foil pad to the breakout.
The Shine by Misfit Wearables is an activity monitor that tracks your steps, general activity level, quality of sleep, and tells time. It uses bluetooth low energy (BTLE) to communicate to the (iOS only) app that helps you track your progress. And its waterproof! We wanted to open it up and see how it works. Check out more photos in the guide on the Adafruit Learning System.
Hackaday came up with an interesting and clever solution to a problem that a wine bottling company in New Zealand was having. They developed an image sensor that can determine if a wine bottle is filled or not.
A wine bottling company in New Zealand got in touch with [Boz] to solve a problem. They needed a way to automatically determine if a wine bottle was filled or not. What he came up with is a very simple yet very effective fill level sensor that can scan thousands of bottles an hour.
There were a few design decisions that went into the construction of this wine bottle sensor. [Boz] could have used a VGA camera sensor, but given the speed of the bottling line (half a meter per second), pushing all those pixels to a computer and doing real-time image analysis would be difficult. [Boz] settled on a much simpler solution – a 1×128 linear CCD analog image sensor. With a PIC microcontroller, this allows the device to check multiple bottles per second, calculate if the bottle is full or not (or overfilled), and send a ‘pass’ or ‘reject’ signal to the rest of the line.
The rest of the assembly is fairly straightforward with an LED backlight providing the illumination for the CCD and a Bluetooth transmitter for checking out the machine’s settings. On the bottling line, the device has 99% accuracy for both red wines in dark bottles and whites in green bottles.
There’s a new reason to watch the world cup and it’s not what you would expect… Cnet news has the full story.
A paralyzed teen, using a mind-controlled exoskeleton, will start off the World Cup 2014 in Brazil, thanks to The Walk Again Project.
The exoskeleton will support the lower part of the body and enable the paralyzed wearer to walk using wireless electrodes attached to the head that collect brainwaves, which then signal the suit to move.
“The vibrations can replicate the sensation of touching the ground, rolling off the toe and kicking off again,” lead robotic engineer Gordon Cheng of the Technical University of Munich told New Scientist. “There’s so much detail in this, it’s phenomenal.”
Arduino Woodgas Datalogger Rebuild for JXQ-10 and Onan Genset. I built the original datalogger during Aprill of 2012 and used it all summer. Now I am cleaning it up, adding some sensors and some indicators….
Read More. And watch for updates based on this last round of feedback.
CNN has a great story about new wearable technology that could help basketball players improve their performance. Sensors in the shooting sleeve make different noises based on how good the players form is while taking their shot. There’s even an app to help players improve their technique which is connected to the shooting sleeve! Read more.
Hardware hacker Samuel Clay has posted this great project using Adafruit parts on his blog, ofbrooklyn with instructions on how to make your own!
As you can see above, I built a photo frame that has a few interesting parts. For one, the software which runs the photo frame, which I explore below, keeps the photos fresh from Instagram and Flickr. It then displays a random photo for a configurable six seconds. Secondly, there is a motion detector, built using a PIR sensor, which only turns the monitor on when somebody walks by.
This photo frame is easy to build, but it does take a bit of know-how. Mainly, you should feel comfortable soldering wires and mounting the screen and Raspberry Pi to a board or other object. The hard part for me was figuring out how to turn the monitor on and off through the command line.
NTSC/PAL (Television) TFT Display – 3.5″ Diagonal: Yes, this is an adorable small television! The visible display measures only 3.5″ (8.9cm) diagonal, the TFT comes with a NTSC/PAL driver board. The display is very easy to use – simply connect 6-15VDC to the red (+) and black (-) wires, then connect a composite video source to the RCA connectors. Voila, a television display! There’s three little buttons that let you enter a menu system for adjusting brightness, color and contrast. The cable has two composite plugs, AV1 and AV2. AV1 is the default and if AV2 goes ‘live’ it replaces AV1. Be sure to try both RCA inputs if one doesn’t show up at first. Read more.
PIR (motion) sensor: PIR sensors are used to detect motion from pets/humanoids from about 20 feet away (possibly works on zombies, not guaranteed). This one has an adjustable delay before firing (approx 2-4 seconds), adjustable sensitivity and we include a 1 foot (30 cm) cable with a socket so you can easily reposition the sensor or mount it using the two drills on either side. Read more.
Ever feel like you’re being watched? Is Big Brother bringing you down? Well you might just be in the market for this “creepy digital tap on the shoulder”. The Atlantic has more here.
We pass under surveillance cameras every day, appearing on perhaps hundreds of minutes of film. We rarely notice them. London-based artist James Bridle would like to remind us.
Bridle has created a wearable device he calls the “surveillance spaulder.” Inspired by the original spaulder—a piece of medieval plate armor that protected “the wearer from unexpected and unseen blows from above”—the surveillance spaulder alerts the wearer to similarly unseen, if electronic, attacks. Whenever its sensor detects the the type of infrared lighting commonly used with surveillance cameras, it sends an electric signal to two “transcutaneous electrical nerve stimulation” pads, which causes the wearer to twitch.
But Bridle’s spaulder has a slightly different goal. Instead of obstructing cameras and algorithms, it merely alerts the wearer to their presence. It’s a technology—and an art project—of reminding. The surveillance spaulder provides a “a tap on the shoulder,” Bridle writes, “every time one comes under the gaze of power.”
NEW PRODUCT – Humidity and Temperature Sensor – SHT15 Breakout – This is a simple breakout board for the SHT15 humidity sensor from Sensirion. The SHT15 digital humidity and temperature sensor is fully calibrated and offers high precision and excellent long-term stability at low cost. The digital CMOSens Technology integrates two sensors and readout circuitry on one single chip.
These sensors are really impressive! Very sensitive and straight forward to use. Board comes assembled and tested with the SHT15.
Precise data logging
Automation & process control
Building control and HVAC
Test & Measurement
2 factory calibrated sensors for relative humidity & temperature
Digital 2-wire interface
Precise dewpoint calculation possible
Measurement range: 0-100% RH
Absolute RH accuracy: +/- 2% RH (10…90% RH)
Repeatability RH: +/- 0.1% RH
Temp. accuracy: +/- 0.3°C @ 25°C
Fast response time < 4 sec.
Low power consumption (typ. 30 µW)
High precision sensor at low cost
Leading CMOSens Technology for superior long-term stability
The Dutch writer Arnon Grunberg, at work on a novella in New York while attached to electrodes. The cap, the novella and the technician were all part of Mr. Grunberg’s latest project, a literary stunt turned lab experiment that combines the rigor of academic neuroscience with the self-obsessive spirit of the “quantified self” movement, which has inspired people to track (and broadcast) the minutiae of their lives, down to the last step taken, penny spent and milligram of caffeine ingested.