DEFCON 22: WarKitteh – cat on the warprowl

Why do the wardriving yourself when your cat can do it for you? Gene Bransfield gave this presentation at the recent DEFCON 22 conference, describing his efforts to use domestic pets wearing WiFi sniffer/GPS logging gear to essentially warprowl for WiFi hotspots. There’s also DoSdog, a standard pooch wearing a backpack concealing a Hak5 Pineapple, and a collar concealing a TV-G-Gone.

MESR-100 ESR meter review and teardown

in Teardowns by DP | 0 comments


Alan Parekh of Hacked Gadgets did a teardown of a MESR-100 ESR meter:

I purchased a MESR-100 Meter from eBay for around $55 USD shipped to my door in Winnipeg (Canada). The meter came well packaged in a retail box, this is a nice change from many other items from China that are simply wrapped in bubble wrap and stuffed into a padded envelope. Inside the box was the meter, two short meter leads and a manual. Pressing the red power button for a few seconds powers the meter, it is ready to use after about 3 seconds. The display is a backlit LCD display, it does appear that the backlight is on all the time. The display is nice and bright and has a good viewing angle, there are two hot spots near the bottom of the display which is probably due to the location of the backlight LEDs but it doesn’t effect display readability.

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Teensy MIDI USB foot controller for controlling Mobius Looper

in DIY, hacks by DP | 0 comments


Thrifleganger wrote this instructable detailing his Teensy MIDI USB foot controller for controlling Mobius Looper:

The concept is quite simple and straightforward. You press a button, the arduino interprets the signal arriving from the button as a midi “control change” signal (typically represented as MIDI CC), and this signal can be mapped to respond to any of the parameters of the looper.

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Node-RED hacking – audio library front-end

in hacks, library by DP | 0 comments


Paul over at Dorkbotpdx writes:

When I started the Audio library, a nice GUI (like Puredata or Max/MSP) seemed an impossibly distant dream. Then, in this forum thread, I learned of the open source Node-RED project.
Over the last few days I’ve been coming up to speed on modern Javascript tools like jQuery and D3, to hack Node-RED into a GUI front-end. Much work still needs to be done before this is usable, but I’m pretty excited about the possibilities!

ST-Link/V2 SWD-JTAG adapter

in how-to, JTAG by DP | 0 comments


alexwhittemore  has posted a detailed tutorial how to make an adapter:  ST-Link/V2 SWD-JTAG adapter 

The fantastic STM32 Discovery boards from ST Micro all come with an embedded ST-Link/V2 debugger onboard, including some jumpers to disconnect it from the target device for use as a standalone SWD debugger. Presumably, this is to allow for easy use debugging a custom end-product PCB, but it’s also useful if you have any other STM32 evaluation boards hanging around with no built-in debugger, but don’t happen to have a proper JTAG dongle handy. Here’s how to make an adapter.
It happens to be the case that I’ve got an STM3210E-Eval board I need to work on, but no compatible JTAG debugger handy. I do have a ton of Discovery boards, so now I just need an adapter to use the Serial Wire Debug capabilities on the STM3210E from my Discovery board.


Experimenting with DirtypCBs

in PCBs by DP | 0 comments


Here’s Microentropie’s new project a VA meter with boards from DirtyPCBs:

I tried the Dirty Board PCBs service
I chose Express shipping because in my country standard shipping means waiting 1+ months due to ‘standard‘ customs operations.
PCBs are currently travelling.

Service until now has been very quick:
Sunday 10 Aug 2014 9:58: Order received “Yum yum. PCBs. FEED ME! ;)”
Sunday 10 Aug 2014 22:30: At board house “Sent to board house, batch #****”
Thursday 14 Aug 2014 22:37: Shipped “Thanks for making us part of your project!”
Saturday 16 Aug 2014 9:00: Trackable “Order trackable: DHL#**********”
still travelling …

Via the contact form.

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DIY Delta-3D printer

in 3D fabrication, DIY by DP | 0 comments


Vegardpaulsen posted pictures of his DIY Delta-3d printer build:

I have had my trusty Makerbot Thing-o-matic 3d printer for over 3 years, and its time to move on to a bigger, better one, as the cost of buing spareparts on the old one gets higher every day. The trouble of repairing the Makerbot all the time vs the cost of upgrading to a newer one with larger build area and faster buildtimes made it an easy decicion!

I recently purchased the Seemecnc Rostock Max V2 kit from Seemecnc and started putting it together right away when it arrived. With a build area of 28cm diameter, and a build height of almost 40 cm this should be fun!
25+ build hours later, its now time to share some pictures of the build.

Arduino GPS map navigation system

in project logs by DP | 0 comments


Kathy Yang of Elecfreaks writes:

Built on the basis of Arduino UNO, GPS, SD card, TFT, GPS map navigation system is to obtain the real-time position information via GPS, to send it to UNO for calculation, according to the calculating results, and teamed up with the map file stored in SD card, thus presenting the position on TFT. The GPS system, owing the function to store the current position information, can be applied to running positioning and to record the running tracing.

Via the project log forum.

ATX Breakout Board V1.1 Acrylic case back in stock

in cases, News by DP | 0 comments

ATXBreakout Board case-W600

The ATX Breakout Board v1.1 Sick of Beige case is back in stock at Seeed Studio. This case is designed to be simple, cheap, and easy to assemble. The ATX Breakout Board is sandwiched between two laser-cut acrylic sheets, and the whole assembly is held together with aluminum screws and standoffs.

This is a minor update with the secondary ground and -5volt post holes cut, and a ventilation opening over the big resistor.

Check out our tutorial on how to customize Sick of Beige cases.

You can get one for $4 at Seeed Studio.

#FreePCB via Twitter to 2 random RTs

in Free PCBs by DP | 0 comments

irtoyv3 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.

Vinctronics LCD Shield V1.0

in LCD by DP | 0 comments

1167253_459775490788391_2059783379_o (1)

Vincent of Vinctronics writes:

This is Vinctronics first ever product – LCD Shield V1.0. Basically, this is a simple shield that provides four important functions:

1. A 2 line by 16 character plug-in ASCII LCD.
2. An active beeper.
3. A DS1307 RTC clock IC with 3V coin cell battery to maintain timekeeping when power is off.
4. Three momentary contact tactile switches.

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The Hackaday Prize: Two days left to get your rear launched into space!

in contest by DP | 0 comments


HackADay’s make open hardware / get your butt launched into space contest has two days left. Get that project posted now! Ian will be one of the Judges, along with Bunnie, Lady Ada, and a bunch of great open hardware hackers:

Sure, the procrastinators out there will probably hold out another day (or two), but we think a lot of qualified people can and will make the deadline. Mike wrote about it here. The contest deadline might be approaching, but we’re just getting started on the fun stuff!

For more details and to register visit Hackaday.  The contest entry deadline closes in 2 days at 11:50pm Wednesday night PDT on August 20, 2014 (06:50 GMT on Aug 21).

OpenHardwareExG: An open source platform for ECG, EEG, EMG, ENG, and EOG signal processing

in open source by DP | 0 comments


OpenHardwareExG,  An open source platform for ECG, EEG, EMG, ENG, and EOG signal processing:

The OpenHardwareExG is a platform for ECG, EEG, EMG, ENG, EOG, and evoked potential applications.

The OpenHardwareExG platform was originally developed as part of the eeg-mouse project.

Project goals
The main goal of the project is to build a device that allows the creation of electrophysiologic signal processing applications. In addition:
Hardware and software that we develop will have a free/open source license. We also prefer to use hardware and software that are free/open source.
We would like to keep the hardware DIY compatible (hand solderable, with parts that are readily available in small quantities, etc.)
For us, this is a hobby and learning project. It’s important to keep it fun, and take the time to learn along the way.

Via Embedded Lab.

Eddystone EC10 communication receiver restoration and PSU add-in

in power supply, repair by DP | 1 comment


Dilshan Jayakody writes:

Recently I got vintage Eddystone EC10 MK1 communication receiver from friend of mine and it is completely dead when it comes to me. EC10 MK1 is one of Eddystone’s very early solid state communications receivers and it use 10 PNP Germanium transistors. This receiver cover 550 kHz to 30 MHz and come up with BFO for CW and SSB receptions.

The main problems which I noticed in my EC10 is corroded wires, components and PCB. I did restoration step-by-step and most of the steps are listed in my page.
Other than repairing, this article covers details of power supply which I integrated into EC10 communication receiver. The schematics and photographs are available at the same article.

The dreamers of Shenzhen’s Maker’s revolution

Another great Shenzhen-Geek tour video from Metalworks:  Maker Faire Shenzhen Trip  Daylon Soh writes:

When the Metalworks team was there in April, we were part of a group of aspiring hardware entrepreneurs and enthusiasts from North America and Europe. Most were looking to bring their hardware product ideas to fruition and were looking for ways to manufacture it cheaply in the city. Some of them would bring their product prototypes back home and raise money on crowd-funding platforms like Kickstarter to get enough pre-sales volume to qualify for cheaper per unit costs. But all of them stumbled with language and cultural differences as we soon learn that everything in the city has a lao wai price and a local Chinese price. 老外 (Lao Wai), is what foreigners of European descent would be called in China, its literal translation would be “old outsider”.


Mini MAME cabinet

in DIY by DP | 2 comments


Greg Kennedy shows you how to make a DIY MAME cabinet project:

 I started this project by taking stock of my components.  Like any good hacker, I have a stack of spare PCs and monitors for occasions like this.  I selected a set that was particularly hard to repurpose, due to its crappy CPU, use of expensive RDRAM, and then the monitor is a 13″ CRT.  These specs would run a vertical cabinet with 4-way joystick nicely.  The “modern” solution is to use some single board computer (say, Raspberry Pi) and an LCD.  I’d rather not send e-waste off to the landfill, plus I’d have to pay for something I already have on hand!

Via Hacked Gadgets.

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Go analog with a resistance-based calculator

in DIY by DP | 2 comments


tanishqjain340 wrote this instructable detailing the build of his analog calculator project:

Do simple calculations with your math box.
The next time you need to crunch a couple of numbers, resist the urge to grab a digital calculator. Instead, round up some variable resistors, also known as potentiometers, and wire them into an analog mathematics rig. By twisting the potentiometers’ knobs and measuring the resulting voltage or resistance with a digital multimeter, you can perform simple multiplication and addition without a microprocessor in sight.

Posted in DIY | Tagged , , | 2 Comments

Electromagnetic Field camp August 29-31, 2014

The 2014 Electromagnetic Field camp is set for August 29-31, 2014.
This annual gathering will be held in Bletchley, UK, and feature a camping festival with a power grid and high-speed internet access; a temporary village of geeks, crafters, and technology enthusiasts that’s lit up by night, and buzzing with activity during the day. Previous events included talks about everything from genetic modification to electronics, blacksmithing to high-energy physics, reverse engineering to lock picking, computer security to crocheting, and quadcopters to brewing.

This year’s conference badge is known as TiLDA MKe and will keep attendees informed of the latest schedule displayed on the badge using automatic updates from a network of radio base stations across the camp site. “At its heart the badge is an Arduino Due compatible 32bit ARM Cortex M3. A rechargeable battery will keep it running for days, and you can charge it over USB when the juice runs out. We added a 128×64 pixel LCD screen, two RGB LEDs, a radio transceiver, joystick, accelerometer, gyroscope, speaker, infrared, and all sorts of other fun parts. It’s compatible with Arduino shields and has dedicated connectors for electronic textiles.”

Tickets are still available online.

Via the contact form.

Free PCB Sunday: Pick your PCB

in Free PCBs by DP | 67 comments


We go through a lot of prototype PCBs, and end up with lots of extras that we’ll never use. Every Sunday we give away a few PCBs from one of our past or future projects, or a related prototype. Our PCBs are made through Seeed Studio’s Fusion board service. This week two random commenters will get a coupon code for the free PCB drawer tomorrow morning. Pick your own PCB. You get unlimited free PCBs now – finish one and we’ll send you another! Don’t forget there’s free PCBs three times every week:

Continue reading →

Posted in Free PCBs | Tagged | 67 Comments