Black Friday deals keep coming from Pololu and from Adafruit

via Pololu Blog

Our Black Friday/Cyber Monday Sale is nearing the halfway point; thank you to all of those who have already ordered! Today’s doorbusters are gone, but the rest of the daily specials are still active, and a lot more great deals are still coming your way, including the weekend deals we just released. We’re not doing any doorbusters Saturday and Sunday, just lots of extra discounts on big categories, so take your time looking around.

The weekend deals include two items we have never had on sale before: smart servos from XYZrobot and a 6DOF robot arm based on those servos. We recently released an Arduino library for the A1-16 smart servos and arm, making them especially easy to expand beyond their preconfigured sequences for use in your own advanced projects.

Our doorbusters will return starting at 6 AM on Cyber Monday, and rumor has it that might be a prime opportunity to snag one or two of our new Balboa balancing robots!

By the way, our friends at Adafruit are having their own Black Friday sale this weekend, with 15% off their entire catalog and 20% off their Feathers and accessories, plus free items for orders over certain amounts. You can find all the details on the Adafruit blog.

Free PCB coupon via Facebook to 2 random commenters

via Dangerous Prototypes


Every Friday we give away some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. The coupon code usually go to Facebook ‘Other’ Messages Folder . More PCBs via Twitter on Tuesday and the blog every Sunday. Don’t forget there’s free PCBs three times every week:

Some stuff:

  • Yes, we’ll mail it anywhere in the world!
  • We’ll contact you via Facebook 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 Official Projects Book volume 3 — out now

via Raspberry Pi

Hey folks, Rob from The MagPi here with some very exciting news! The third volume of the Official Raspberry Pi Projects Book is out right this second, and we’ve packed its 200 pages with the very best Raspberry Pi projects and guides!

Cover of The Official Projects Book volume 3

A peek inside the projects book

We start you off with a neat beginners guide to programming in Python,  walking you from the very basics all the way through to building the classic videogame Pong from scratch!

Table of contents of The Official Projects Book volume 3

Check out what’s inside!

Then we showcase some of the most inspiring projects from around the community, such as a camera for taking photos of the moon, a smart art installation, amazing arcade machines, and much more.

An article about the Apollo Pi project in The Official Projects Book volume 3

Emulate the Apollo mission computers on the Raspberry Pi

Next, we ease you into a series of tutorials that will help you get the most out of your Raspberry Pi. Among other things, you’ll be learning how to sync your Pi to Dropbox, use it to create a waterproof camera, and even emulate an Amiga.

We’ve also assembled a load of reviews to let you know what you should be buying if you want to extend your Pi experience.

A review of the Pimoroni Enviro pHAT in The Official Projects Book volume 3

Learn more about Pimoroni’s Enviro pHAT

I am extremely proud of what the entire MagPi team has put together here, and I know you’ll enjoy reading it as much as we enjoyed creating it.

How to get yours

In the UK, you can get your copy of the new Official Raspberry Pi Projects Book at WH Smith and all good newsagents today. In the US, print copies will be available in stores such as Barnes & Noble very soon.

Or order a copy from the Raspberry Pi Press store — before the end of Sunday 26 November, you can use the code BLACKFRIDAY to get 10% off your purchase!

There’s also the digital version, which you can get via The MagPi Android and iOS apps.

We think this new projects book is the perfect stocking filler, although we may be just a tad biased. Anyway, I hope you’ll love it!

Gif of Picard smiling at three children

The post The Official Projects Book volume 3 — out now appeared first on Raspberry Pi.

Racing Simulator Built From Scrapheap Finds

via hardware – Hackaday

Paradise means something different for everyone, it could be a sitting by a fire on a rainy night or lying on a sun-kissed beach. But for us, and makers like [liltreat4you], it’s a well stocked scrap pile out behind the house. After buying a racing wheel and pedals for his Xbox, he took a trip out to his little slice of paradise and found nearly all the hardware he needed to build a professional looking race simulator. According to his breakdown, most of the money he spent on this build ended up going into that sweet red paint job and the speed-enhancing stickers.

Everything the light touches is our kingdom.

Not all of us are as lucky as [liltreat4you], and we probably won’t just happen upon a driver’s seat out of a Mazda, or a bunch of perfectly bent metal pipes from an old trampoline out on the back forty. But trolling Craigslist or cruising around for flea markets can still get you parts like these for cheap, so try not to be too discouraged if your backyard isn’t quite as well stocked.

Once he had the metal pipes and seat from the car, the rest of the build came together pretty quickly. After building an oval out of his salvaged pipes, he attached the seat and the arms that would eventually hold the steering wheel and display. A plate was also added at the bottom for the pedals to sit on. By using long bolts, [liltreat4you] was even able to add a degree of adjustment to the wheel position. Being that he got his seat out of a real car, there’s the usual adjustment you’d expect there as well.

Speaking of which, [liltreat4you] casually mentions that you should disconnect the battery of the donor vehicle before taking out the seat, as it’s possible that the removal of the seat or the disconnection of the seat harness can cause the airbags to deploy. We can neither confirm nor deny this, but it’s probably safe advice to follow.

The purists out there may claim that what [liltreat4you] has put together doesn’t quite meet the definition of simulator in its current form. But with the addition of some instrumentation and just a bit of physical feedback, he’ll be well on his way to the complete driving experience.

Filed under: hardware, Virtual Reality, Xbox Hacks

2017 Black Friday and Cyber Monday Sales

via SparkFun: Commerce Blog

This year, Black Friday and Cyber Monday will share one big sale! During the sale almost all of our catalog will be 20% off! We also have a few even bigger deals below. This is the best time to prepare for all your upcoming projects. Sale starts at 12:01 a.m. MT on Friday, 11/24. Enjoy the deals!

Specialty Items

LIDAR-Lite v3

$149.99 $114.95
HackRF One

$299.95 $234.95
FLiR Dev Kit

$259.95 $199.95
Hot-air Rework Station - 303D

$114.95 $89.95
uArm Swift Pro

$1,129.95 $899.95
bladeRF x40

$420.00 $334.95
RockBLOCK Mk2 - Iridium SatComm Module

$249.95 $194.95
TAZ 6 3D Printer

$2,499.95 $2,000.00
LulzBot Mini 3D Printer

$1,250.00 $1,000.00


SparkFun Inventor's Kit - v4.0

$99.95 $79.95
Makey Makey - Standard Kit

$49.95 $34.95
SparkFun Tinker Kit

$49.95 $34.95
LilyPad Sewable Electronics Kit

$99.95 $69.95
Raspberry Pi 3 Starter Kit

$89.95 $69.95
SparkFun Inventor's Kit for RedBot

$119.95 $89.95
SparkFun Sensor Kit

$129.95 $99.95
SparkFun XBee Wireless Kit

$95.95 $69.95
SparkFun PiRetrocade

$39.95 $29.95

SparkFun Favorites

SparkFun RedBoard - Programmed with Arduino

$19.95 $13.95
Arduino Pro Mini 328 - 5V/16MHz

$9.95 $5.95
SparkFun Simultaneous RFID Reader - M6E Nano

$199.95 $149.95
SparkFun ESP32 Thing

$19.95 $12.95
Arduino Pro Mini 328 - 3.3V/8MHz

$9.95 $5.95
LilyPad LilyMini ProtoSnap

$14.95 $9.95
SparkFun ESP8266 Thing

$15.95 $9.95
SparkFun ESP8266 Thing - Dev Board

$15.95 $9.95
SparkFun RedStick

$19.95 $11.95


SparkFun Inventor's Kit for micro:bit

$49.95 $39.95
SparkFun micro:bot kit

$59.95 $44.95
SparkFun moto:bit

$14.95 $11.95
SparkFun micro:arcade kit

$49.95 $34.95
SparkFun micro:bit Breakout (with Headers)

$5.49 $3.95
SparkFun weather:bit

$14.95 $11.95
SparkFun micro:bit Breakout

$4.95 $3.49
SparkFun gamer:bit

$9.95 $7.95


Spectacle Motion Kit

$89.95 $69.95
Spectacle Light and Sound Kit

$149.95 $99.95
Spectacle Light Kit

$99.95 $74.95
Spectacle Director Board

$24.95 $14.95
Spectacle Sound Kit

$99.95 $74.95
Spectacle Light Board

$14.95 $9.95
Spectacle Button Board

$14.95 $9.95
Spectacle Audio Board

$14.95 $9.95
Spectacle Inertia Board

$19.95 $12.95
Spectacle Motion Board

$14.95 $9.95

Extra Items

Resistor Kit - 1/4W (500 total)

$7.95 $3.95
SparkFun Capacitor Kit

$6.95 $3.95
STEMTera (White)

$45.00 $34.95
STEMTera (Black)

$45.00 $34.95
Circular Robotics Chassis Kit (Two-Layer)

$14.95 $9.95
Circular Robotics Chassis Kit (Three-Layer)

$19.95 $12.95
STEMTera (Blue)

$45.00 $29.95
STEMTera (Orange)

$45.00 $29.95

Black Friday and Cyber Monday rules

The sale will run from 12:01 a.m. MT on Friday, 11/24, to 11:59 p.m. MT on Monday, 11/27. No rainchecks or backorders on sale items are allowed. Distributor accounts will not be eligible for Black Friday sale prices. Some items will have maximum quantities available per order. We will not be allowing combining of orders during this sale.

Please Note: We will be working hard to get as many orders out as possible, but we cannot guarantee same-day shipping for the sale days.

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Precision Voltage Reference Source

via hardware – Hackaday

[barbouri] found a few old (vintage?) parts from the early ’80’s while rummaging through his parts bin, and quickly spun out a small PCB to build a 10.000 V reference using these old ICs. Throwing together a small number of parts, he was able to build a source which might be good enough to use as a reference for another circuit or provide a quick calibration check for some of his bench instruments that have a resolution of 1 mV or maybe even 100 μV.

The AD584* pin programmable precision voltage references have been available since the ’80’s and offer four programmable output voltages of 10.000 V, 7.500 V, 5.000 V, and 2.500 V. The chip is laser-trimmed to ensure high accuracy and low temperature coefficient and requires just a few external components to function. It is available in TO-99 hermetically sealed metal can and 8-pin DIP variants. The “S” version of the device that [barbouri] used provides a temperature coefficient of 30 ppm/°C max over a -55 °C to +125 °C temperature range but other versions of the chip offer a better stability. Analog Devices seem to have discontinued the “L” version (pdf), since it is no longer listed in the current data sheet, but you can still get them from a few sources. The “L” version has a temperature coefficient of just 5 ppm/°C.

Using quality parts such as high stability resistors and TO-99 PTFE socket with gold-plated contacts, his observations confirm that the unit is stable within 30 μV, with a very slow voltage increase of a few microvolts every 6 hours. A 15 V linear regulator powers the device with input power coming from an external wall wart. A small aluminum enclosure houses the device, with two gold-plated 4 mm sockets for the output. If you would like to build your own, his board design is hosted on OSH park, or you can download the Eagle CAD design files. He’s posted all links on his blog post, and provides part numbers for all of the parts used. [barbouri] has been doing a good job of building handy devices for his work bench – check out his well-built milli Ohm Meter that we had featured earlier.

Filed under: hardware