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Easy Pulse mikro is now available on Tindie

Posted on October 10, 2016 by R-B One comment

Easy Pulse mikro, a DIY pulse sensor with a mikroBus form factor, is now available at our Tindie Store. a new addition to our Easy Pulse Sensor series. Its mikroBus form factor enables easy integration with Microchip’s MPLAB Xpress board as well as with mikroElektronika‘s numerous development boards. Similar to our original Easy Pulse V1.1 and Easy Pulse Plugin, it also operates on the principle of transmittance photoplethysmography applied to fingertip using infrared sensors. Easy Pulse mikro provides all necessary instrumentation and amplification on board to detect the cardiovascular pulse signal from the fingertip. The output is a nice and clean

Smart stick for visually impaired

Posted on October 10, 2016 by R-B Leave a comment

This project article from 4D Systems describes how to build a smart stick that uses sonar to guide visually impaired. It uses 4Duino, which is an Arduino compatible computer board with built in 240×320 resolution TFT LCD Display and Wi-Fi capabilities. The stick consists of three ultrasonic sensors that can sense obstacles in three directions (left, right and front) within a distance of 400 cm. When an obstacle is detected within the range, the user is notified with the activation of a vibration motor. Because 4Duino is WiFi enabled, the user can also send text messages to a web browser for help in emergency situations

Pallete: An open source tongue computer interface.

Posted on October 10, 2016 by R-B Leave a comment

Designed by Dan Levine, Pallete is a fully open-source wireless computer interface to allow the mobility impaired to control computers, Android tablets and phones using the tongue. It uses infrared sensors to track tongue motion, a microphone to detect tongue taps, and Bluetooth technology for communicating with computers. Dan’s smart mouthguard is also a winner for the Assistive Technologies award of the 2016 Hackaday Prize. It is open sourced, all the design source files and instructions are available online. Moreover, it uses off-the-shelf components, so any developer/builder/hacker can follow the instructions and build Pallette. We hope to establish a community around tongue-control technology, so the people in need

Open source glucose meter shield

Posted on October 10, 2016 by R-B 2 comments

M. Bindhammer won an award for the Assistive Technologies category of the 2016 Hackaday Prize contest for designing an open source Arduino shield that can measure blood glucose level using electrochemical test strips. His glucose meter shield receives the blood sample through a One Touch Ultra test strip and prints out the glucose level on the Arduino IDE serial monitor window. Here is a demo video of the glucose meter shield. Typically the electrodes are coated such that an enzymatic chemical reaction occurs at the electrode surface and this reaction dictates the resulting current. The details of the electrochemistry can be quite

HID IR Keyboard using PIC18F25J50

Posted on October 9, 2016 by R-B 2 comments

A PIC18F25J50 based USB HID IR keyboard from Suraj Bhawal uses a TSOP IR decoder IC to receive IR signals from an IR remote and convert them to HID inputs. For this project, I used a PIC18F25J50 microcontroller with a TSOP IR decoder. I used this microcontroller because of three reasons. First, this mcu is available in tiny QFN package which helps reducing the overall board size. Second, this mcu supports usb communication without using an external crystal/resonator which again helps reducing the board size. And third, is that I have several of these laying around in my stock. The list of

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