Introduction Electrodes on the skin are used to detect muscle (EMG), brain (EEG), and heart (ECG/EKG) functions. These electrophysiological measures are commonly utilized for clinical use, research investigations, and even by enthusiasts such as those intrigued by brain computer interfaces. Numerous commercial systems are categorized as “medical grade”, indicating that they come at a high
Open source multi-channel EEG/ECG/EMG Continue Reading
Equipment: Arduino UNO microcomputer, PC with Arduino IDE installed, and a USB cable. CdS PhotoSensitive Resistor(s), 10K Ohm Resistor, and Parallax PIR Motion Sensor Passive sensors detect some physical phenomena and provide some amount of information about it that can be used for action or reaction. If sensors are passive, they may have an
Passive Sensors – Detecting Light and Motion Continue Reading
A simple and elegant way to help keep your personal space bubble from being invaded by close talkers and overly huggie people. This is a stolen or borrowed idea from Phillip Torrone of Adafruit, who mused about something like this on an episode of Adafruit’s “Ask an Engineer.” I decided to incorporate this idea
Personal Space Defender Continue Reading
This piano-liked thing is what I called touch sticky note. I Use a piece of sponge as the paper, and put 8 x 8 LEDs under the sponge. Whenever I touch the touch screen, the related LED will turn on, and this is how I write for the sponge. I got the idea from the
Touch Sticky Note using Arduino Continue Reading
So my last project was a Arduino wind chill machine. http://www.instructables.com/id/Arduino-Wind-Chill-Machine/ Naturally, this Lazy Old Geek wanted to add a weather vane (wind direction) to my weather station. Who cares, you may ask? Well, I am a Geek. Actually, wind direction has some importance. Here in the high desert, the winds are usually from the
Arduino Weather Station Part2 Continue Reading
Has this ever happened to you? You wake up in the morning and realize that you’re terribly late for work/class/your weekly pedicure/whatever. You throw on a t-shirt and flip flops, sprint around your warm, heated house grabbing your belongings, and race out the door…where you suddenly find yourself surrounded by a cold, biting wind encompassing
The CoaTracker using Arduino Continue Reading
The yoga breathalyzer is a breath visualization tool to help you understand and get in touch with your breathing. Breath is the basis of yoga and meditation, and this biofeedback tool is one way to develop a deeper understanding of your own breath. Using Arduino, a headset-mounted wind sensor, and an LED strip, it’s simple
Yoga Breathalyzer Continue Reading
As a Water Quality professional working in the drinking water field, I know how important it is to accurately monitor the disinfectant levels in the drinking water that gets served to the public. Usually, that means taking weekly grab samples in the distribution system and measuring free chlorine or total chlorine residual via a DPD
ORP / pH / Temperature Data Logger Continue Reading
For my first instructable, I’d like to present The Parking Spotter. This is not a new concept, I know. However, this build was done specifically to suit my needs/wants/materials already in my possession. Typically, a project begins with an idea, parts are then gathered, and the building commences. In my case I looked around at
Arduino Ultrasonic Parking Spotter Continue Reading
As a follow up to the Arduino Audio Input tutorial that I posted last week, I wrote a sketch which analyzes a signal coming into the Arduino’s analog input and determines the frequency. The code uses a sampling rate of 38.5kHz and is generalized for arbitrary waveshapes. I’ve also turned the LED attached to pin
Arduino Frequency Detection Continue Reading
