Instructables
Picture of LED Dice
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This Instructable offers a walk-though of the "Electronic Dice Kit" assembly.

This kit is available at etsy and ebay.

This kit comes with everything needed to complete the project (shown below)  including a battery.

This is a nice kit for beginners to learn to work with solder, or anyone looking to spice up a game of Monopoly...or Chess.

There is a single momentary button, when it is held, a random number will light as it would be displayed on a die.
 
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Step 1: Installing the Trigger.

Picture of Installing the Trigger.
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The trigger is your button to cal upon a random number. While the button is held, a number will display. When you let up on the trigger, the display will go out. The button does not have polarity, and can not be wired incorrectly due to a rectangular footprint. The trigger holds it's self in the board well enough to not need help while soldering. There are four solder points which will need completed on the underside of the board to secure the trigger.

Step 2: Installing LEDs

Picture of Installing LEDs
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This device comes with seven LEDs. This is the focal point of the project, so we want it to look nice. Using a small piece of masking tape, you can hold the LED to the board. Otherwise, when the board is flipped over to solder, the LED is going to lean in to an unpleasing angle. After the LED is soldered in place, the extra leads can be removed.

The LEDs do have polarity, and CAN be installed wrong. If you look closely, the footprint of the LED is not a prefect circle. There is a flat side on the negative lead. You will also see the positive lead is longer. Take care to align the flat side of the diode's footprint with the flat side of the screenprinted footprint on the board. All of the LEDs do not point the same way. Check the polarity of each LED before soldering it in place.
colin5511 months ago
The circuit really needs current limiting resistors to the LEDs to prevent overloading the outputs of the micro.
scoochmaroo2 years ago
Awesome! You should enter this in the Father's Day Challenge!