OpenDrop – Digital Microfludics Plattform

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An open source digital microfludics platform from GaudiLabs, that is also available on github:

OpenDrop is a new design for an open source digital microfludics platform for research purposes. The device uses recent electro-wetting technology to control small droplets of liquids. Potential applications are lab on a chip devices for automating processes of digital biology. How ever the present design should also open the technology to other field and allow experimentation to find new applications. Including the field of art, music, games and education.

OpenDrop – Digital Microfludics Plattform – [Link]

PWM dimmer for LED lighting

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Lukas Fassler has published a new project, a DIY PWM dimmer for LED lighting. The dimmer can handle 100W@12V and is controlled by a single potentiometer.

I have recently moved to a new apartment and was looking for a PWM dimmer to control some 12V LED strips. I thought that should be easy enough nowadays but it proved more difficult than I thought. All I found either didn’t meet my requirements, were uggly or expensive. So I decided to build my own, tailor-made to my needs.

PWM dimmer for LED lighting – [Link]

maker.io – a new website for DIY projects

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Digikey has launched a new website for the maker and DIY world. The aim of this new website is to help people take their ideas from concept to product by providing the tools and resources on every step of the process.

Maker.io was created to help makers understand the phases that occur from concept through production. Digi-Key knows designers will have stumbling blocks throughout the phases, and the main objective of the site is to walk makers through the design-chain “Roadmap” that offers an aggregated community of tools, ideas, solutions, and information that properly meet the needs of the marketplace every step of the way.

maker.io – a new website for DIY projects – [Link]

MAGIC PIXEL – Bluetooth full color LED display

MAGIC_PIXEL

MAGIC PIXEL is a full color LED display able to show animations, scrolling texts, and video from a PC or Mac. The display can also be controlled using an Android or iOS device via bluetooth interface.

Magic Pixel is a universal and handy Bluetooth LED display, which we’ve been developing with focus on ease of use and effectivity. It can be used for displaying advertisement, information or just for fun. Magic Pixel is an ideal solution where effective and dynamic visualization of information is required.

MAGIC PIXEL – Bluetooth full color LED display – [Link]

Electronics & Arduino Reference Cards

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Adafruit has published some new Business card-sized references for Arduino and basic electronics. Adobe Illustrator format files are available for download on their github.com repository.

Adobe Illustrator format. These are sized for Overnight Prints‘ standard business card template; full color, double-sided…rounded corners are optional but add a touch of class (and won’t cut off any information). Creative Commons license, feel free to print your own, remix and share!

Electronics & Arduino Reference Cards – [Link]

PlatformIO – open source ecosystem for IoT

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PlatformIO is an open source integrated development environment for the IoT world. It comes with an IDE which allows you rapid embedded system development and with library manager which organizes hundreds of the most popular libraries. It’s cross platform without external dependences and supports 200+ embedded boards, 15+ development platforms, 10+ frameworks. Check it out on the link below.

PlatformIO – open source ecosystem for IoT – [Link]

LMD18200 H-Bridge Module for DC Motor

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The module has been designed around LMD18200 from Texas Instruments. The LMD18200 is a 3A H-Bridge designed for motion control applications. The device is built using a multi-technology process which combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure. Ideal for driving DC and stepper motors; the LMD18200 accommodates peak output currents up to 6A. An innovative circuit which facilitates low-loss sensing of the output current has been implemented.

Features

  • Powerful bi-directional DC Motor driver
  • Screw-terminals for Power Supply and Motor Connections
  • 6-pin Header connector for PWM, direction, current sense, Brake
  • Delivers Up to 3A Continuous Output (6A Peak)
  • Operates at Supply Voltages Up to 55V
  • Low RDS (ON) Typically 0.33Ω per Switch at 3A
  • TTL and CMOS Compatible Inputs
  • No “Shoot-Through” Current
  • Thermal Warning Flag Output at 145°C
  • Thermal Shutdown (Outputs Off) at 170°C
  • Internal Clamp Diodes
  • Shorted Load Protection
  • Internal Charge Pump with External Bootstrap Capability
  • Mounting holes of 2.6 mm each
  • PCB dimensions 44 mm x 25 mm

LMD18200 H-Bridge Module for DC Motor – [Link]

ATMEGA328 based Weather Station

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Vlad @ denialmedia.ca has build a solar powered weather station based on ATMega328 microcontroller that is able to measure temperature, a humidity, and UV radiation and it uploads measurement on WeatherUnderground network. The data are send to the air using a 433MHz link. The sensors used are DHT22, ML8511, BMP180 and a TP4056 charger IC is used to charge the Li-Po battery from a solar cell.

ATMEGA328 based Weather Station – [Link]

Arduino Analog Signal Graphing on a TFT

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dmainmon @ instructables.com has build an analog signal graphing project using Arduino Mega 2560 and a 2.8 TFT display. This project is used to display two analog signals as line and bar graphs. Touching the screen pauses the graph and opens a menu to adjust setting for the graphs.

The project uses an Arduino Mega 2560 and UNO R3 2.8 TFT Touch Screen to display two analog signals as line and bar graphs. One signal is a photo resistor and the second is an audio sample from an Adafruit Electret Microphone Amplifier with Adjustable Gain module. The audio signal is graphically displayed twice; once in the center using a line graph and also on the bottom with a bar graph. The top graph represents the photo resistor signal.

Arduino Analog Signal Graphing on a TFT – [Link]

Quantifying cooling system

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Chris Palmer has built this coolometer project to measure the cooling effectiveness of various fan:

I was wondering about how I was going to calibrate the airflow reading but then realised that the flow rate is not actually what I am interested in. It is the cooling effect the airflow has, which is what I am directly measuring. The result is simply the extra power needed to maintain a target temperature and is a measure how fast the bulb filament is being cooled. So rather than an anemometer I decided to call it a coolometer. Unfortunately Futurama used that name first. Rather than displaying megafonzies mine displays milliwatts!

Quantifying cooling system – [Link]