Mechanical 7 Segment Display Clock Using An Arduino & 28 Servos

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Published 2020-04-14

In this project, I’ll be showing you how to build a mechanical 7 segment display clock which is driven by 28 servos controlled by an Arduino Uno. Time is kept using a DS1302 real time clock module and each servo is independently controlled using two PCA9685 16 channel servo drivers to expand the Arduino’s PWM IO over the I2C interface.

For a detailed write-up on the build and further description of the code & 3D print files, have a look at the full build through this link - www.the-diy-life.com/mechanical-7-segment-display-…

Parts List and Purchase Links:
Arduino Uno - amzn.to/2XwmXAa
DS1302 Clock Module - amzn.to/2RvdZj1
2 x PCA9685 16Ch Servo Drivers - amzn.to/3ejtPXA
28 x Micro Servos - amzn.to/2xvg0oz
Ribbon Cable - amzn.to/3bbX78I
Male Pin Header Strips - amzn.to/2VrQvML
Female Pin Header Strips - amzn.to/3b9TO1N
3mm MDF - amzn.to/3etUa5A
Black Spray Paint - amzn.to/3cjEKz0
5V 5A Battery Elimination Circuit - bit.ly/37jXHPa
12V Power Supply - amzn.to/2SbKGTk

3D Printer Used - amzn.to/33MXHH0
Filament - amzn.to/2RBNwQJ

If you’ve got any suggestions for Arduino projects or tutorials, let me know in the comments section below.

All Comments (21)

@heyimamaker 4 years ago

Love this, I always had a fascination with these types of clocks.
@donguhl2499 4 years ago

This is a pretty cool clock! You did an awesome job explaining the code! I wish more people would explain the code when they post their projects. Great video!
@PauloZancoski 4 years ago

Very smart project , congratulations !
@66tbird1 4 years ago

Great idea and well-executed on all levels. Kind of NIXIE-ish but without the high voltage.
@RickSaffery 4 years ago

Your build is next level cool. I got pulled in the moment I saw 'mechanical' 7-segment in the title. I stayed because your content and production quality is superb. Color me an instant subscriber.
@kevchef 4 years ago

everything about this is soooo cool!
@mattw7949 7 months ago

Very cool project!
@oumardiop1 4 years ago

wasnt even looking for this, but its dope
@hydraim9833 4 years ago

I am impressed, really cool project
@dustinjohn171 2 years ago

Cool project!
@user-su2zv3vw9q 3 years ago

와우~ 정말 대단하십니다...
@cocoliso365 4 years ago

Great project. Wonderful. Big things are better ;-)
@macrobionic 4 years ago

Looks Great
@GeoProgrammer 3 years ago

cool project
@srinathrajasekar8099 4 years ago

nice work michael...i feel its different to see a mechanical 7 segment display
@jpcme2002 4 years ago

Excellent, thanks for the share ;)
@ALNITAKT 2 years ago

I love it!
@ronen124 4 years ago

very impressive ✌👓
@marvinestevez8842 1 year ago

Hey micheal love the video I was wondering how the arduino was being powered ? And where should the 12 v battery be placed and what should connect to it
@azimalif266 2 years ago

Add LEDs with defuser on each segment. Then have them light up when they face up.