Three New Products for Friday!

Three new products in store today as well as some notable restocks. First up is the blinkiest of them all - the 15 NeoPixel Ring Segment!

Unusually for Adafruit we're going to have to get the camera out. The image above is a bit of a blur while the lovely lit image below shows four of the product in action, which is a little misleading in my opinion, not intentionally but combining that with the official name of NeoPixel 60 LED Ring 1/4 Segment you can see how folk would get confused!

 

You'll agree a beautiful product. If you've been living under a poorly lit rock for the last 6 months you might want be wondering what a NeoPixel is. Well NeoPixel is a trademark of Adafruit it's their name for a whole bunch of products built with the fabulous WS2812 and WS2812B LEDs from WorldSemi. The WS2812 has an integrated controller chip within the LED package. It still needs to be told what to do but the protocol is fairly simply, if time specific. They need a microcontroller like an Arduino to drive them really.

Next up we have a new servo! This is the step up from our 9g hobby servo weighing in at about 15g due to its metal gears! I've been using a lot of servos lately and keep coming across times where a bit more torque is needed, so that's the niche these fill. For where you need a like for like replacement for a resin gear servo with a bit more grunt. I got the screwdriver out so you can have a look under the hood.

Like it's lighter cousin it comes with a set of "horns" and fixings so you can attach it easily where it's needed. Take a look at the listing for details of how to run this fella from a Raspberry Pi or Arduino.

The last new product is the Ultrasonic Distance Sensor! This a great and low cost sensor, perfect for the nose of your robot or for a haptic feedback glove. With a range of 2cm up to 5m with an accuracy of +/- 3mm it's extremely versatile for the price of just £1.99. Again it will work on a Raspberry Pi or Arduino. We include a couple of resistors so the 5V logic that it kicks out won't fry your Pi (as long as you use them!). What more would you want? Picture of the product with a 10p coin? Yup got that too.

If you check out the listing there's some more info and also evidence of how cold it was in the office today, I couldn't bring myself to take off my miser mits for the photographs!

I'll be quick with the restocks... we got a whole bunch of these:

an handful of these:

more of these:

Oh these too!

and these:

These....

and not forgetting THESE!!

That's it for tonight!

Single Sided PCB Arduino Clones

Now those that know phenoptix board will know it's an obsession of mine to avoid vias. Single sided is best but I can rarely achieve it. The first version of the Cylon PCB was actually single sided but having to alternate the polarity of the LEDs as you inserted them was going to cause some problems. Doing single sided boards is fairly difficult, so they always impress me when I see them. This morning I spotted this by way of theelectronics-lab blog - the Nanino by Johan von Konow.

You can see straight away that it's beautifully laid out. The tag line is that it is DIY friendly but there are too many holes for my liking in that prototyping area if I'm entirely honest. It does however give or shall we say represent, as nothing is given (BY-NC-SA!) a simple one sided Arduino compatible PCB. This has of course been done before, and it would seem by people who understand licencing. The Aryduino is another great looking board and actually acknowledges the copy left licence that Arduino is released under.

I had intended to write this whole blog about the Nanino but the licencing has really annoyed me. The Aryduino has power management anyway which makes it much better. Dr. Ayars lists the pros and cons of his board as follows

Hoo-ah:

• Standard Arduino form-factor and mount-points.
• Accepts standard Arduino shields.
• Single-sided board, easy to make with toner-transfer method. 
• 16MHz ATmega328.
• No SMT parts.
• On-board 5V regulation.
• Screw-terminal power-in connector, rather than barrel jack.
• Pin-13 LED.

Meh:

• Lacks on-board USB-Serial conversion, so programming requires an FTDI cable.
• No 3.3V regulator.
• This is as detailed a board as I ever want to make using toner-transfer.  
• No TX/RX LEDs.
• No ISP connector.
• Three component-side jumpers. Couldn't quite get all traces on the back side!

Which is a really fair and honest appraisal. His does have three jumpers but that's still pretty good with so many components. The populated boards have a sort of "fun" look about them, it's probably the detail of using different coloured jumper wires. I tend to use resistor and LED legs for that particular task!

The Eagle files have been shared too, again unlike the Nanino. Making the Aryduino a really very nice Open Source project. That is worth celebrating. It's a real shame about the Nanino, Johan you've let yourself and Open Source down. Copy left you dufus! Probably a little strong but I'm getting fed up of celebrating sudo Open Source or Fauxpen Source projects. We need to start calling BS on some of these. /rant

These aren't the first single sided Arduino boards to have existed but what I have seen this morning. More can be found on the Arduino forums and via the magic of google!

New Products for Mid March!

We've just got in a bunch of new products, and they can all be found here on our New Products section. Most of them are requests from customers, so we should sell at least one of them! Others are products that I've been curious to play with for some time now, so watch out for more in depth posts coming up.

The first of the customer requests is this Galvanic Skin Response sensor or GSR. GSR is a method of measuring the electrical conductivity of the skin, which varies with the moisture, caused by sweating! Since sweat is controlled by the sympathetic nervous system it's measurement can be used as a measure of emotional and sympathetic responses. They are therefore commonly used along with a few other methods in lie detectors, e-meters and would no doubt make a good addition to your Voit Kampff machine. Shown below being used in conjunction with a Grove Shield, Grove Connectors, Grove Buzzer (we don't stock that yet!) and a Seeeduino (Arduino clone that we've just restocked).

It comes with the finger clots shown and you don't need the grove system to use it. It connects as a standard analogue input on an Arduino and can be used on a Raspberry Pi with an ADC (Analogue Digital Converter). 

Looking next at our first Bluetooth Low Energy module, from Seeed Studios. Reading the blurb I've copied straight from Seeed I'm quite amused to see that it's sudo jibberish, I did first write complete jibberish, but that wouldn't quite be true. Lets try and pick the nuts out of it anyway.

It's based on the CC2540 Bluetooth low energy chip from Texas Instruments. Grabbing some of the info from TI we can see that its a true single chip solution capable of running both application and BLE protocol stack and includes peripherals to integrate with a wide range of sensors etc. Beginning to see why the Seeed text is gibberish now... the user guide for the chip is 353 pages long. I've linked both the big guide and also the datasheet:

• Datasheet for CC2540
• Pocket Userguide for CC2540

Really the important things to note with this module is that Seeed have broken it out into the standard XBee format so classics like the Adafruit XBee breakout will work with it as well as all your favourite shields will work. You'll get about a 50 meter range and you should be able to interface easily with your Android or Apple based telephone choice. I'd like to test these on my Nexus some time soon. If I've not updated the copy and paste listing in a week or so please give me a nudge!

Moving on we have the Rainbowduino, a creatively named Arduino compatible with an on board LED driver so you can drive (by which I mean source the current as well as control) 192 LEDs. That's a 8 x 8 RGB Matrix or 4 x 4 x 4 RGB LED cube! Projects for the near future I think! I do have a small stock of 8 x 8 RGB Matricies looking for a home! This is possible as the ATMega328 is complimented by a couple of LED drivers right on the board. On uploading the image below (again from Seeed) I've noticed that it is in fact four 8 x 8 RGB Matricies, which is beyond the capabilities of this board!! These four are being driven by what would appear to be I2C - A0 and A1 on the Rainbowduino and a separate power feed. Naughty Seeed, and of course me for perpetuating this slightly dodgy marketing!

Sticking with RGB blinky goodness - we picked up some WS2812B LEDs from Adafruit, these are the "secret sauce" behind all of the NeoPixel products that come by way of Adafruit.

They're the latest version of the LEDs with an integrated WS2811 microcontroller which does all of the hard work! These have reverse voltage protection and also a constant current driver for the LEDs. You actually don't need external choke resistors on these, as was previously reported on the WS2812 LEDs. They're rolled the voltage source for the IC and the LEDs into a single Pin now so we're down to 4 pins on the LED. It's all covered in the Datasheet which is available here:

• Datasheet for WS2812B

Now for another item I plan to test on my phone! Inductive charging sets! These appear pretty simple to use, as it's an Adafruit product the write up and explanation is pretty good and I'll only add to it when I try with the coil in the Nexus. Watch this space! 

Another great product by way of Adafruit next, the Midnight Hacker! This is a tiny Leatherman ES4 Squirt with wire strippers. I've had the pliers version for a good few years now and they are a robust and extraordinarily useful tool, which can get you into trouble if you're not careful. Read the full embellished description if you want to know why. If not quickly snack on the tasty images from Adafruit below

   

One last product for this post by way of Adafruit, one that I've quite fancied for a little while. The Adafruit PCB Ruler. This handy 6 inches of FR4 contains a great many of the most popular SMD footprints as well as trace widths and wire gauges, it is all Imperial but you can't have everything right?

As with all our product we'd really be grateful of your feedback and suggestions, and most of all we'd be grateful of your orders! Thanks for reading this far, there are a few more to cover but I'll save that until the morning.

TTFN

Ben

Hackaday Projects goes live to the public!

Having been one of the fortunate few to have had a sneak peek at the late closed Alpha of Hackaday Projects I would say it's definitely a website to visit and visit often. It's already jam packed with great projects, that you'll probably see there first as they're often not completed at the time of publishing.

It's my belief that this site fills a yet unfilled niche in the hacker / maker world. Somewhere to actually work on projects, rather than a pedestal to put your shiny finished products. Sites like Instructables and Thingiverse put you in the part of the creator of a thing who wants to share it. Hackaday projects puts you in the place of someone working towards a thing, where people can help you out along the way with a kind word or even collaboration on your project. It's like a big online hackspace where everyone is working at their own bench but every now and then look over and say, "hey that looks cool" or "want a hand with that?" or quite possibly "why on earth are you doing it like that?" or "whoa! You're going to lose all the fingers on your left hand".

The site is new so expect a few glitches and for it to be a bit clunky at times, but it seems that the team working on it are doing so proactively and there are improvements happening all the time. They've also just launched a competition, which is something we all love! To build something SciFi themed with a collaborator. I do have an idea in mind...

If you do decide to stop by please check out my page, I'll be working on some projects on there and posting up the details of some of our previous ones too. I am hacker number 654 or there's this link if you prefer.

Plotting Time - Open Source Clock - Plot Clock

Some days you get into work and find out someone has made something awesome. Those are good days. When that thing is Open Source it's an even better day. This is one of those days. 

Jonnanes of the Nuernberg Fablab has created the plotclock. The plot clock is built from 3mm Acrylic or can be 3D printed and consists of three 9g servos controlled by an Arduino Uno. Two servos control the arms that hold the pen and the third lifts the arms and therefor pen from the surface. The files for the machine can be found on thingiverse along with the code, the code is also in GitHub so it's double OpenSource. The Build instructions are available on the Fablab site as linked in the first sentence of this paragraph.

After some tinkering and breaking of parts we've got it together. No joy on the wiper part yet but it's a work in progress. All of the parts we broke we redesigned a little so clumsy people like our good selves don't snap them too. This was mainly increasing hole sizes slighty so self tapping can be used, which actually makes the build super easy. There's an edit to the left and right arms too, where they attach to the servo, making it easier to attach. All of the edits have been uploaded and cross referenced on Thingiverse

When is a Pi not a Pi?

Well when it's an Arduino compatible of course! Spotted by the eagle eyedRecatha this robot based Kickstarter seems to have got confused, or are cynically skirting the Raspberry Pi Trademark to sell a few kits.

Lets apply Hanlon's Razor and say it's a mistake and they've not heard of the Raspberry Pi we can then draw our focus to the Arduino Compatible board that ships with the robot. It's clearly based on the Uno and says as much in the blurb but the image that we can see only has the Kickstarter company's details, no attribution is visible, we only have 50% of the evidence available at the moment so lets not speculate any further until we see the whole thing!

We look forward to seeing how this pans out and wonder if there will be any fall out from "the Foundation" regarding the use of Pi in the robotics and electronics field.

More on the Cambridge Pi Jam

Now that the dust is settling it seems that other participants (and organisers) are getting together their thoughts and media on the 5th Cambridge Raspberry Pi Jam which took place on Saturday the 8th of February 2014. Youtube videos and blogs are popping up all over the place and frankly I'd like to watch and read them all! I'll try and keep them together on this post so it may evolve over the next week (or day).

First up is this funky short from Michael Horne (aka Recantha) just look out for flashing lights and you'll spot us!

Next up we see the whole day pan out right from set up. We're top middle right, you'll see the flashing lights switch on at about 30 seconds in. It was a really great day, seeing crammed into 6 minutes is quite fun.

Last up we have charwarz blog who sums up why she didn't by a Cylon kit. If only she'd known that it would have taught her about Charlieplexing as well as being the ocular display of a robot killing machine...

I may be repeating myself in saying the Raspberry Pi Jam was great. You should see if there's one near you. Check out the PiJam uberwebsite for details! I'm looking forward to seeing more reports as the week rolls by as well as catching up on all the cool stuff I missed whilst manning the stall via the PiJam Youtube channel