A new board came in today: SeeedStudio’s LinkIt ONE!

A few days ago, Seeed Studio posted a contest in which 10 pieces of their newest board, the LinkIt ONE, would have been given away to makers who had a good idea on how to use them for an hobby project.

You can find more info about the board here, it’s basically a 32-bit MCU development board which has lots of connectivity options built-in (GPS, cellular, Wi-Fi, Bluetooth, Audio, SD card) and is compatibile with the Arduino IDE. It is based on the MT2502A microcontroller.

I immediately applied for the contest and a few days later they replied saying they liked my idea and they were kind enough to send me a LinkIt ONE.

I received the board today (fast shipping with FedEx!) and it’s very neat.

This is how the whole package looks like. The board is definitely well-made and feels solid.

 

Center: LinkIt ONE board. Left: Wi-Fi/BT, GSM and GPS antennas. Right: 1000mAh battery (included) and 2 Grove modules I needed (not included)

Center: LinkIt ONE board. Left: Wi-Fi/BT, GSM and GPS antennas. Right: 1000mAh battery (included) and 2 Grove modules I needed (not included). SD and SIM slots on the back.

 

The info sheet is included in the package: By quickly looking at it, the only complaint I have is the limited number of PWM outputs (2, might be solved with software PWM libraries) and analog inputs (3, can be increased using a demultiplexer) compared to Arduino.

However, the price (79$) is unbeatable considering all its connection options: separate Arduino shields would definitely have a much higher cost. Moreover, the MCU is a lot beefier than your average Atmega. Keep in mind that this board runs at 3.3V.

More info and photos after the jump!

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Building a better breakout board for ATX PSUs.

13/07/2015 UPDATE: PCBs of the new version have arrived. Blog post and store link!

30/06/2015 UPDATE: New version released, x20 PCBs printed and coming in the mail. New source files and details on GitHub (click me!) – available for sale in a couple of weeks

13/11/14 UPDATE: Eagle files have been uploaded, you can find the link at the bottom. Thank you for your interest!

Many people over the internet have already found out the usefulness of having an ATX PSU, often salvaged from old computers, on their bench. It can be quite easily converted into a lab bench power supply (owners of a real one, please don’t kill me).

There are lots of videos on how to add binding posts to your PSU and how not to, but I didn’t like any of these solutions. I tried the first one, but my power supply was so small and tightly packed that wires and binding posts wouldn’t fit right in it.

I then came across Sparkfun’s and Dangerous Prototypes’ ATX breakouts. While I didn’t like the Sparkfun one, the one from Dangerous Prototypes convinced me a bit more.

Yet, I felt like it lacked some features I needed. I wanted some USB ports to power my rPi and charge my Nexus 5, and an adjustable voltage output. Furthermore, my PSU had a 24-pin ATX connector.

While I still consider myself a beginner in the enormous world of electronics, I decided to look up some guides on how to design a PCB (this time I’ve gotta thank you, Sparkfun! Both yours and Adafruit’s libraries and tutorials rock!) and have a try at it.

Fast forward some days later, my very own ATX breakout board was born.

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