Wednesday, December 3, 2014

Bubble Display, Propeller

HP 4-Digit Bubble Display (7-Segment LED)
I used a Sparkfun coupon to buy a couple of vintage, 4-digit, 7-segment, HP LED bubble displays. The kind you'd find in really old calculators. Their guide is most helpful.

I used one of my spare eeZee Propellers to play around with the display and create driver code. I haven't played in Spin in awhile, so it was a good refresher. Here's what I did...

Tuesday, November 25, 2014

Holiday Deals for Nerds Like Us

Lots of sales going on again this season at our favorite geek retailers:

Tindie Cyber Monday : Big sales from many vendors this Cyber Monday.

  • 15% any one item in the Bot Thoughts Store, coupon code DA54D6C, good through Friday
  • $2 off Digispark - Lowest Price Ever! Digispark! The micro-sized, Arduino enabled, usb development board - cheap enough to leave in any project! Coupon 9D4B1F3
  • 30% off PiScreen is a 3.5" TFT (480x320) with touchscreen control for the Raspberry Pi. Never need a monitor again! Coupon 02971ED
  • 20% off much of the Arachnid Labs' Store - including the successful Kickstarter, Re:Load Pro. Coupon 21A2FD3
  • 15% off all products in the Geppetto Electronics store! Coupon 92C9FC5
  • And lots more on sale; full list here
Pololu Black Friday 2014 : Starts Wednesday with doorbuster deals.

Pololu Robotics and Electronics is having its biggest Black Friday/Cyber Monday sale yet, offering huge discounts on over 600 products, along with 11% to 15% off orders over $100!  Save big on robots, programmable controllers (including A-Stars, Arduinos, Raspberry Pis, and mbeds), sensors, motor drivers, power supplies, LEDs, actuators, wheels, breadboards, wires, and more.  The first doorbuster deals go live Wednesday, November 26, and the sale runs through Cyber Monday (December 1).  For details, visit http://www.pololu.com/blackfriday2014

E-Z Robot Black Friday
 : 20% off all robot kits + free shipping!


Science Fiction inspired robots that don't require programming (unless you want too)! In 1977, the world invited the Apple II Personal Computer into the home. 2014, ezrobot has launched Revolution, a robot for everyone! Whether you choose the Revolution clip'n'play robots or developer kit, ezrobot is making robotics, well... easy!

HobbyPartz Black Friday Sale: 15% off select items including Gens Ace batteries.

Coupon code BFSALE15, ends Nov 30, 11:59PM. Sale on LiPo batteries, RC gear, video cams, and more.

Schmartboard Black Friday : 25% off the entire store! Limited time.

"Look for an e-mail on Friday. The special will be very limited in time, very unlimited in its breadth, and significance. Schmartboard thanks you for a good year."

RoboSavvy Black Friday : 50 products with savings up to 67%

FriedCircuits Black Friday : 25% off USB Tester 2.0 and Sharp Distance Sensors. All other products are 15% OFF. Sale beings Thursday 11/27 and ends Monday 12/1, midnight PST.

Adafruit Black Friday : 15% off plus free stuff. 
Welcome to the Black Friday sale – 15% off plus all the free items & shipping as you shop! Use code: BLACKFRIDAY on check out. We thought about doing flash sales or complicated codes but that’s a lot of frustrating hoop jumping for everyone, so we came up with what we think is an amazing deal that is straight forward, no stress and valuable – a 15% off discount anything in stock and lots of great free things automatically depending on how much you order.

We are currently offering a FREE Adafruit Perma-Proto Half-sized Breadboard PCB for orders over $100, a FREE Trinket 5V for orders over $150, FREE UPS ground (Continental USA) for orders $200 or more, a FREE Pro Trinket 5V for orders over $250

Sparkfun Cyber Monday 2014 : 20% off Actobotics, hourly flash sales 7am - 7pm

On Cyber Monday (12/1), everything in our Actobotics category is 20% off. That means everything from Actobotics Kits to DC Motors is marked down. If you’re looking to start exploring the world of robotics, or stock up for your next build, this is a killer chance to do so. Next on 12/1/2014, we are offering hourly flash sales from 7 a.m. to 7 p.m. Mountain Standard Time, with 30-50% off on some of our most popular products. These items have been hand-selected by our employees and are some of our favorite designs! Details: Sparkfun Cyber Monday 2014

2014 Parallax Holiday Sale : Their holiday sale includes microcontrollers, robots, and more.

BASIC Stamp Sale started Nov 10. Free USPS Priority shipping and 10% off the entire store. Robot kit sale (ELEV-8 Quadcopter, Arlo Robotic Platform System), Best Sellers Sale, and other mystery deals! Also, a free WS2812B module with every order.

GHI Electronics: Black Friday through Cyber Monday sale on FEZ MCU boards and more!

The sale will start this Friday, November 28th and will end Monday, December 1st (UTC-05:00) Eastern Time (US & Canada). Lots of great boards on sale including discontinued models.

Trossen Robotics Black Friday : Interbotx & RobotGeek 20% Off, 10% off everything else in the store!

Black Friday / Cyber Monday is here at Trossen Robotics! Interbotix & RobotGeek brand kits and parts are 20% off, everything else in the store is 10% off! Use coupon code "Friday14" to redeem your discount at checkout! Offer good from 12/28/2014 - 12/1/2014 *Offer excludes HR-OS1 and HR-OS5 Humanoid Platforms.

HobbyKing Cyber Week Sale: LiPos, servos, motors, planes, and more.

Running all week, we will be dropping prices and offering amazing deals on literally hundreds of the most popular items in the HobbyKing catalog. Models, lipos, tools, chargers, we'll be offering amazing discounts from all product categories, so you're almost guaranteed to pick up an amazing deal. If you don't see something you are interested, check back in an hour because our offers will be added and changed constantly. This isn't a week where you want to be away from an internet connection.

Electronics Goldmine : has a few door busters and some discounts worth looking at.

Drone Life : has a list of drone sales, too

Wednesday, November 5, 2014

Holiday Sales: Parallax

It's that time of year again. Our favorite hobby electronics stores are doing their annual sales.

2014 Parallax Holiday Sale Schedule
Our season of promotions has begun! Here is a sneak peek of upcoming sales on www.parallax.com. These deals will be available for online orders only.
  • BASIC Stamp Module Sale - Begins 11/10/14
  • Free USPS Priority Shipping and 10% Off Entire Store
  • Robot Kit Sale (including ELEV-8 Quadcopter, and Arlo Robotic Platform System)
  • Best Sellers Sale
  • and other mystery deals!
Also, they're offering a free WS2812B module with every order.