Find all your DIY electronics in the MakerShed. 3D Printing, Kits, Arduino, Raspberry Pi, Books & more!

Make: Projects

4-Foot Wooden Digital Clock

How to make a 4-foot-long digital clock using mahogany, rice paper, LEDs, plexiglass, 74HC595 and ULN2003 chips, and an Arduino.

4-Foot Wooden Digital Clock

Need to know what time it is, but don’t own a phone, computer, microwave, or any of the other 100 clocks you probably already have? How about a huge mahogany digital clock to prove your geek prowess?

Steps

Step #1:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock
  • Get some wood. I chose mahogany.
  • Create a template for your 7-segment digit.

Step #2:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock
  • Use a scroll saw to cut the LED segments out of the wood.
  • Use a plunge router to hollow out the back side of the wood.
  • Stain the top side of the wood. I used a satin poly.

Step #3:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock

Connect the digits together using brass tubes and super glue.

Step #4:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock

Get some plexiglass and cut pieces to the shape of the LED segments. (I used the scroll saw for this.)

Step #5:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock
  • Get a few LEDs (I used blue 5mm).
  • Drill holes in the edge of the plexiglass.
  • Super-glue the LEDs into the holes.

Step #6:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock
  • Paint the back and edges of the LED segments with metallic paint.
  • Sand the front of the LED segments. The scratches will diffuse the light.
  • Apply some voltage.

Step #7:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock
  • Take 2 thin sheets of plexiglass and sandwich rice paper between them.
  • Hot-glue the LED segments to the plexiglass.
  • Solder wires to all of the LEDs.
  • Hot-glue the plexiglass to the inside of the digits.
  • Connect each of the LED segments to a ULN2003A, and a 74HC595 chip. See the schematic. I also added a 220ohm resistor per LED.

Step #8:

PrevNext
4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock4-Foot Wooden Digital Clock
  • Connect the chips to an Arduino and use the time library to "ShiftOut" the time to the 74HC595s.
  • Stand back (way back) and check the time.
  • Put it up on your cubicle for all your fellow drones to admire!

blog comments powered by Disqus

Featured Products from the MakerShed

Follow

Get every new post delivered to your Inbox.

Join 25,789 other followers