Congrats to Adam Gutterman for finding the cake. The cake is hidden on an internal ground layer, printed in “negative” (i.e., lack of copper on a copper plane). The visible-light photos I make of the motherboards are all taken with front-lit scanners, so the negative image is virtually invisible when viewed in that way. There’s also a solid copper ground plane behind the cake as well, so you can’t simply hold the board up to a light to find the cake (hence the larger bounty). The only two methods to find the cake are to either X-ray the board, or to mechanically delaminate the board using either knife or sandpaper (or both) to reveal the cake. And for the record, the region where the cake is located is electrically inert, such that defacing the chumby logo to reveal the cake does not damage the function of the device.
That was fast!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Steve Ballmer Serves Up a Fascinating Data Trove
Wearables — Chalk it up
Electronics — Look to ferrites (no, not ferrets, the European polecat) when faced with high frequency
Biohacking — A Run in the Altra IQ Smart Shoes
No comments yet.
Sorry, the comment form is closed at this time.