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Description: 4-digit 7-segment displays are really neat little devices, it’s a shame that they can be so cumbersome to control. Well we’ve solved that problem by making them a little bit “smarter.” The SparkFun 7-Segment Serial Display combines a classic 4-digit 7-segment display and an ATMega328 microcontroller allowing you to control every segment individually using only a few serial lines.
The Serial 7-Segment Display can be controlled in one of three ways: Serial TTL communication, SPI serial communication or I2C serial. You can even program it for stand-alone operation since the ATMega328 comes pre-loaded with the Arduino bootloader! There is also an FTDI header on board and we’ve provided a hardware profile for the Arduino IDE to make it even easier to program.
We’ve made some layout changes to this design as well which will make it easier to incorporate these into your project. We’ve moved the power and I2C pins to the sides of the board such that you can chain them together in order to display longer strings of digits. We’ve also added mounting holes to the boards so you can mount them on standoffs (no more hot glue!)
Dimensions: 41mm x 23mm (1.6in x 0.9in)
Based on 2 ratings:
Good reliable displays, way too dim Though. This can be overcome by either using thier conductive paint and painting across the resistors on the back, or, by using some goopy solder and bridging across. Stock they are far too dim, unreadable and usless in daylight. The older model they used to have was far better Sparkfun told me the resistors were an improvement on the new design, but if uou can’t read the display anymore… well…. that is sort of the purpose of them
Greetings. These displays can take anywhere from 3.0V to 5.5V and will increase in brightness with increased voltage(up to 5.5v). The resistors are current limiting resistors designed to protect the segments and as a result will make segments dimmer but increase the lifespan of each segment. Bypassing these resistors or removing them and adding a solder bridge can cause the segments to fail sooner. If you believe that you may have received a defective product please contact Techsupport@SparkFun.com.
A previous comment indicated dim output. With a 5 V Arduino Uno this was very bright. I actually cut back a little on the brightness by setting it at about 75% through the software. I found the documentation pretty good. I had to get more information, but that was because I’m not very good at serial protocol. I think this is a good product and will be ordering a couple more for some other projects. Thanks.