Monthly Archives: December 2015

ESP8266 WiFI LED controller hack

via Dangerous Prototypes


Andreas Hölldorfer of ChaozLabs wrote an article detailing how he hacked the cheap WiFi LED controller:

This pictures show the PCB. As you can see there are pins labeled as RX,TX,GND,3.3V. I simply connected an USB-Serial converter to the pins. The two other pins are GND and GPIO0. If you set a jumper between this two pins, the controller starts in bootloader mode.
The chip above is a NXP HC245, a 3-state Octal bus transceiver. It is used to drive the N-channel MOSFETS (20N06L – 20 A, 60 V, N−Channel DPAK).
The power supply is a 2 stage design. A AOZ1212 3A Simple Buck Regulator to convert the input voltage to about 5V and an AMS1117 low dropout voltage regulator to get 3.3V.

More info at ChaozLabs site.

Check out the video after the break.

VertiGo robot drives up walls with propellers

via Pololu Blog

VertiGo is a novel robot designed with one main goal: the ability to drive on floors and walls, even if the walls aren’t perfectly flat. To accomplish this, it uses tiltable propellers for propulsion rather than motorized wheels. The propeller tilting is controlled by two Pololu Jrk 21v3 USB motor controllers with feedback. Students at ETH Zurich made this robot in collaboration with Disney Research Zürich.

You can visit the VertiGo website for pictures and project news.

#FreePCB via Twitter to 2 random RTs

via Dangerous Prototypes

KHOS-2-3-4-5-6P Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a every week:

  • Hate Twitter and Facebook? Free PCB Sunday is the classic PCB giveaway. Catch it every Sunday, right here on the blog
  • Tweet-a-PCB Tuesday. Follow us and get boards in 144 characters or less
  • Facebook PCB Friday. Free PCBs will be your friend for the weekend

Some stuff:

  • Yes, we’ll mail it anywhere in the world!
  • Check out how we mail PCBs worldwide video.
  • We’ll contact you via Twitter with a coupon code for the PCB drawer.
  • Limit one PCB per address per month please.
  • Like everything else on this site, PCBs are offered without warranty.

We try to stagger free PCB posts so every time zone has a chance to participate, but the best way to see it first is to subscribe to the RSS feed, follow us on Twitter, or like us on Facebook.

The Edison SIK Experiment Guide

via SparkFun Electronics Blog Posts

If you’re like us, you’re anxiously awaiting the release of the SparkFun Inventor’s Kit for Intel Edison, the newest addition to the SIK family and a great way to get started programming with JavaScript and building connected projects. You can pre-order the kit already, and we anticipate having the kits built up and shipping out by February!

In the meantime, we’ve released the online experiment guide so you can get an idea of what to expect, and get a head start on some of the concepts.


SparkFun Inventor's Kit for Edison Experiment Guide

December 17, 2015

Learn how to harness the power of the Intel® Edison using JavaScript to post data to the cloud, control electronics from smartphones, and host web pages that interact with circuits.

And if you need even more Edison while you wait, you can explore our Getting Started with Edison video series, which covers concepts like blinking an LED, WiFi and working with SparkFun’s ecosystem of Blocks for the Edison.

You can also watch our exclusive two-part Google Hangout series with Intel, hosted by Rex St. John and resident SparkFun Edison expert Shawn Hymel. The first episode, which covered what the Edison is, some project ideas, and an overview of the Blocks can be found here, and the second episode, which focuses on transforming prototypes into products, can be found here.

Hopefully these resources will keep you busy and scratch your Edison itch for a few weeks while we’re feverishly assembling the brand new SIK!

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Adding a USB power port to a switch for IoT

via Dangerous Prototypes


Jesus Echavarria wrote a how-to on adding a USB power port to a switch:

I want to start some projects with Arduino and IoT, so the first things I need is an Arduino board, an Ethernet shield and a switch to connect it to the net. Also I need a power supply for the Arduino board, and I think that, better than a external USB AC wall adaptor or power supply, is modify the switch to add it a USB power port that can power the Arduino board. I’ve got at home a TP-Link TL-SF1008D, a simple 8 port 10/100 Mbps switch. So, let’s go to open it and add it the USB port!

More info at Echavarria’s blog.

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