The following display features eight 7-segment displays arranged in two rows of four digits. The on-board MAX7219 driver enables you to easily add eight 7-segment LED displays to your project using only 3 I/O pins of microcontroller. The major advantage of using this board is the time-division multiplexing operations required for continuous refreshing of the display digits are performed by the MAX7219 chip, thereby keeping the microcontroller free for doing other pressing tasks. It is suitable for displaying two variable values simultaneously in a project, such as displaying temperature and humidity, or current and voltage, etc.
8-digit seven segment LED display with SPI interface – [Link]
Brian writes… [via]
I found these electromechanical vane displays on eBay and accidentally won them. So, here they are! These are seven segment displays. Each segment is painted a bright yellow and fluoresces under UV light. The segments do not actually draw any power except when they are moved. Behind each segment is a solenoid that flips the segment on or off. Several units are then daisy chained together to form larger numbers. Watch the video below to see it in action and be sure to check out the image gallery.
Staver Electromechanical 7 Segment Vane Display - [Link]
Using the Arduino development platform you will learn how to display numbers and letters on a single 7-segment LED display. There are many ways to drive 7-segment displays — this is a fairly simple method.
Arduino – Hooking up a 7-Segment LED Display – [Link]
This project is a digital voltmeter based on 16F88 microcontroller, a 7 segment 3 digit display and some resistors.
Digital Voltmeter – [Link]
A circuit made for displaying the time using 7 segment display (for decimal display) and LEDs (for binary display). I used an Atmega16 microcontroller and shift registers in the schematic. For more details contact me.
Binary and Decimal Clock - [Link]
In this project Markus shows us how he build a 7 segment RGB LED display by replacing the individual leds of the display.
7-segment LEDs are available in red, green, yellow and blue (maybe even in white?). There don’t seem to be any in RGB though, so if you want to dynamically use different colors in your project you either have to use multiple devices or use a different technology.
So this seemed like an opportunity for a nice DIY project: Why not take an existing 7-segment display, remove the original LEDs and add some RGB ones?
7-Segment RGB-LED – [Link]