Disassemble "Coin" which can combine multiple credit cards into one piece

Universal card that can store multiple credit card data collectively and switch up to eight credit cards with one card "Coin"When we recruited manufacturing funds at Cloud Funding, we succeeded in financing fairly quickly. However, it was finally released in the spring of 2015 at the end of the twists and turns such as being delayed by about 1 year before the release by the release. A person who disassembled the Coin and confirmed what the inside looks like is showing out the contents in the blog.

Bits of Cents - Coin Card Teardown
http://www.bitsofcents.com/post/124593977646/coin-card-teardown

You can understand what kind of cards Coin uses and how to use it in a single shot by looking at the following article.

"Coin" which can use a plurality of cards such as Cresca and cash card at the same time - GIGAZINE


Venture capitalistMatthew WitherslerHe told me that he has experienced a breakdown four times since he acquired Coin. I heard that Coin 's durability is tedious as it was broken in 12 hours after it was broken. "Cool but not an essential item," Wizzler, who evaluates Coin, was forced to choose between "to have it replaced" or "to decompose" about the broken Coin, where curiosity wins and breaks down I decided.


Apparently there seems to be a decomposition habit for Waisilla, already you can order goods with one button "Amazon DashAbout the experience of disassemblingIntroduction on blogdoing. The coin decomposition work is more difficult than Amazon Dash.

Disassembly starts from the work of peeling the back seal first. Since the name of the owner is stated on the back of Coin, it is possible to check the owner of the card at the time of settlement.


Carefully periperi so as not to damage the magnetic stripe. The brown part is a magnetic stripe. It seems that it is not a common 3 track type but 2 track type.


It is like this when peeling off the seal. The wiring of the printed circuit board is seen a little. At the bottom right of the photo is the lithium battery, (PDF file)specification sheetAccording to the 3 V voltage stuff is used, it seems impossible to replace.


Continue to peel off the surface seal.


When peeling is over it is like this. At the bottom right of the photo is the E ink display, and the operation button is on the left. Since there is a character "GEN 4.5" at the top of the card, you can see that this card is a model from the fourth generation to the fifth generation. Coin was released about 1 year from the scheduled shipping time in the cloud funding, but release can be expected that it was necessary to upgrade the version.


Coin's only tip is Nordic's "NRF 51822". The CPU can communicate with ARM's Cortex M 0 using Bluetooth LE. Memory is 16 KB / 32 KB, storage is 128 KB / 256 KB. This chip allows Coin to store up to eight credit card data. According to Mr. Wilson, "The number of test points on Coin's board is amazing".


When comparing Coin (top) and American Express' s credit card (bottom), you can see how cool Hardware Coin is.


Wizailler who dismantled that Coin's packaging method with cards thinly packed parts is wonderful, but it is too shameful that it is too fragile, said Williams.