Seven segment displays are usually a pain to use, as they require a lot of pins from a microcontroller to operate.  Thankfully, Adafruit has made it a lot easier to use a seven segment display by giving you four digits that only require 2 wires from your microcontroller to operate.  Even better, you can connect multiple displays together and still only use two pins.  You can easily work one of these displays into your halloween project.  Here are a few projects that use the Adafruit seven segment displays to give you some inspiration.

Great Scott! DeLorean-Inspired Time Circuit Clock!

Make a clock with a seven segment display, RTC, and an Arduino.

Geobox: a reverse geocache box that opens when you arrive at a certain destination.

Make a clock with a seven segment display and a Raspberry Pi.

Check out all of Adafruit’s seven segment display options here (there are a lot of color options).

HAPPY HALLOWEEN! Each day this month (Monday-Friday) we’re going to have a special “Electronic Halloween” post here on Adafruit. It will be a hack, mod, project or something we’ve found that combines all the best things about electronics and Halloween.

We’re going to also figure out a date for the FIRST EVER Google+ Live Hangout On Air Event & costume contest! Stay tuned for that! For now be sure to join the Adafruit Google+ page!

View all our Electronic Halloween posts here! From now until 10/31/2012 use the code HALLOWEEN2012 on check out to get 10% off anything in our “EL Wire/Tape/Panel” category.