Arduino Wheelchair Project: Motorized Controller Mount

This was an Arduino wheelchair project we developed for Principles and Practices of Assistive Technology (PPAT) in Fall 2016 at MIT. We made an Arduino-based motorized wheelchair controller mount for our client, Lisa. She lives at the Boston Home, a center for people with progressive neurological diseases, and has Multiple Sclerosis. With her old controller mount, she would often bump into sinks and tables ...

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Writing a python module to simulate a LCD

So recently I got a Raspberry pi and a 16x2 character LCD screen , I thought , lets make a simple game that can be played on the lcd. my first instinct was to code directly for the lcd on the pi , but as I started coding I realized that the clutter of having the lcd connected wasn't really necessary while i am programming the game's logic . I decided to make a python module that gives me the lcd output on m ...

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LazyMax 1000: Arduino Phototransistor and Haptics Project

The idea for this Arduino phototransistor project came to me based on an idea that was shared by one of my friends at the FabLab. He talked about how his lab only has stools for people to sit on. Being very uncomfortable, the person succumbs to the discomfort and stands up to move around. In our case, we had very comfortable rolling chairs for sitting and reclining, which can get you lazy and even sleepy re ...

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Study Finds a Way to Prevent Fires in Next-Generation Lithium Batteries

Menlo Park, Calif. — In a study that could improve the safety of next-generation batteries, researchers discovered that adding two chemicals to the electrolyte of a lithium metal battery prevents the formation of dendrites – “fingers” of lithium that pierce the barrier between the battery’s halves, causing it to short out, overheat and sometimes burst into flame. The findings, published June 17 in Nature Co ...

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Arduino and Processing IDE Communication Tutorial

In this tutorial, we will make the communication between the Arduino and Processing. We will make the communication in both the ways, from the Arduino to Processing and from Processing to the Arduino. We will change the color of the serial window in the Processing IDE through the potentiometer value sent from the Arduino IDE. We will turn the LED ON and OFF depending upon the mouse button pressed in the Pro ...

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Current-sense amp integrates precision shunt resistor, in single package

For highly accurate measurements over a wide temperature range, TI’s INA250 integrates the shunt resistor with a bi-directional, zero-drift current-sense amplifier to support both low-side and high-side implementations. It enables high-accuracy current measurements at common-mode voltages that can vary from 0 to 36V. The family of devices will be available in four output scales; 200, 500 and 800 mV/A, and 2 ...

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How to Make an Arduino Temperature Data Logger

In this project, we are going to make an Arduino Temperature logger that will get the temperature value from the LM35 temperature sensor and the time from the DS3231 Real Time Clock module. Then we will store these values in the SD card file using the mini SD card Module. After that, we will access this file from a PC and create a chart of these values in the Microsoft excel.   Required Components The compo ...

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Garage Door Fingerprint Lock

This is an electronic garage door opener designed around a SparkFun GT-511C1R fingerprint scanner. There is already a very good instructable by user nodcah that describes how to build almost this exact device, from which I took 99% of my inspiration. I'm posting this to easily share with my local makerspace, and for anyone who likes to see things done slightly differently. The door opener system consists of ...

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Revive Old Drive-In Speakers with a Modern LED Twist

When I was a kid we went to the drive-in theater to see movies like The Legend of Boggy Creek and Evel Knievel. I loved those movies but I remember just as vividly those retro-cool metal speakers that entered into our car for these campy films. A few years ago I found one of these speakers at a flea market and it came home with me. After it sat in my garage for years, I finally decided it needed to be what ...

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Guidelines for reading an optocoupler datasheet

Optocouplers, also known as opto-isolators, are components that transfer electrical signals between two isolated circuits by using infrared light. As an isolator, an optocoupler can prevent high voltages from affecting the side of the circuit receiving the signal. Transferring signals over a light barrier by using an infrared light-emitting diode and a light-sensitive product, such as a phototransistor, is ...

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Build a Simple Cocktail Drinkbot with Arduino

Big parties need a conversation piece, and what’s better than a drink-making robot? Not only is it a good conversation starter, it also frees up the party host who would normally be the bartender. It turned out that the drink robot was a really good idea. The Mai Tai recipe presented here has the alcohol dialed back making it a good idea for a work party. The robot is really an Arduino microprocessor (Uno v ...

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Major step for implantable drug-delivery device

An implantable, microchip-based device may soon replace the injections and pills now needed to treat chronic diseases: Earlier this month, MIT spinout Microchips Biotech partnered with a pharmaceutical giant to commercialize its wirelessly controlled, implantable, microchip-based devices that store and release drugs inside the body over many years. Invented by Microchips Biotech co-founders Michael Cima, th ...

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