What can 2 ECE’s, a MechE and a CS major do in only 5 days of hacking? This is a project done for CMU’s hack-a-thon session called Build18. The LED boards were previously designed by me but all other work was done in the week-long session.
96 RGB LED’s driven by 12x TLC5947 LED drivers. 12-bit PWM resolution per color channel per LED.
Diameter: 1.5 feet
Full brightness: 6 amps of LED current
Didn’t have time to figure out how to transfer through motor, so it is battery powered by 2x 4AA NIMH cells which have the perfect discharge curve for what the LED drivers need.
Don’t forget the obligatory Jimmy Wales face:
Flickering is due to interaction between camera frame rate and update rate of the propeller clock and is not that bad in real life. Thanks to all my group members who have done the majority of the work!
Costas Akrivoulis – Junior ECE, Coding, mounting, lots of stuff
Jitu Das – Junior CS, algorithms for display and pre-processing of images
John Howland – Senior MechE, designed the mount and all mechanical parts — the hardest part for us ECE majors
Allan Wang – Senior ECE, Designed LED boards, hardware
Much more technical details will be posted shortly after the dust settles from demo day.