I hope that Ping , a side project by the Secret team that has nothing to do with Secret itself, is going to stick around in some capacity. I loved the little knowledge bits that it sent me randomly. I just checked the app and other than a couple weather notifications, the last curated content was pushed to me 2 weeks ago :(
Chase this is super awesome! However, I hit a small snag. I wanted to go above the $20 and donate a total of $50 but Watsi won't let me because my gift card only has $20. I tried to sign up but couldn't find the button and eventually had to Google to find it. Maybe add a sign up button next to sign in, or allow me to donate $50 by adding a card now (when I hit donate).
Bilateral club foot is something that I struggled with as a child, I am extremely happy that I will help someone else to have the corrective surgery and lead a normal life. Thanks for that opportunity.
Thanks to you, Chase, for Watsi and thanks to Segment for making my life as a developer much easier by taking the pain out of implementing analytics in my software. Much love to both of you!
EDIT: Even after signing up and adding my credit card, I still can't donate more than $20 until I spend my gift card. Guess I'm making two donations.
This is great feedback. We had to cut scope to get gift cards out in time for the holidays, but we're going to enable people to add value to their gift cards in the future. For now, we really appreciate the double donation :)
We're also working to reintroduce sign up. Re: tips, there's an "other" field where you can add any amount, and we're going to keep A/B testing the entire tip flow to make sure it's as simple as possible.
That would be a tough book to write. As a (still) English citizen living in the US for 25 years, the thing that amazes me is how varied everything is. It's less homogeneous than anywhere I've lived or visited, taken as a whole. Can you compare SF to Fort Wayne, NY to Toledo or Chicago to Tallahassee in any meaningful way?
Someone on HN previously posted "Which of the 11 American nations do you live in?" And while I don't agree with all of these -- Dallas and Austin are certainly not "Greater Appalachia" and probably deserve some kind of Texas "nation" of their own like "Tidewater" -- it's certainly true that "American Society" has many distinct parts. (Moving from Colorado to Connecticut to Mississippi felt like living abroad in three separate countries.)
I'm calling shenanigans after reading their specs.
Here are my reasons:
NFC + EMV secure elements are issued by banks and can't be reprogrammed. You can't switch between them on the fly. You can only house "multiple" EMVs if you can by some grace of god magic convince the different banks, and Amex to take your card to their facility and program it with their secure info and then give it back to you.
E-ink displays are WAY thicker than they can fit in there. They are also made on GLASS substrate, much more fragile than something you want to put in your pocket. If you looks closely at the video the e-ink screen is faked by CGI. It doesn't perfectly register in the same location on every frame. There is a shake.
Driving an e-ink display requires high bias voltage, ~+/-20V. Often done via charge pumps with chips such as TI's TPS65180 (http://www.ti.com/product/tps65180). The chip alone (minus PCB) is thicker than a credit card and therefore a credit card slot. The switching capacitors you'd need to generate the voltage would also be too big to fit within that footprint.
"E-ink displays are WAY thicker than they can fit in there"
No, I have in my pocket a PayPal Security Key: it is the same size and thickness and flexibility as a credit card, yet it houses an e-paper display: https://www.paypal-community.com/t5/image/serverpage/image-i... They have been on the market for 5+ years, so the technology is there. Plastc has a bigger display, but there is no doubt it can fit in a credit card because an e-paper display does not require that much supporting circuitry. See this guy who tore down the PayPal card: http://www.stahlke.org/dan/displaycard/
I looked at more teardown pics. It is definitely a segmented display which is far easier to drive than an active matrix (i.e. "pixels"). They also don't have wireless and a host of other things that this device proclaims to have.
There are several variants on the NFC protocol. Some contain secure elements (with a CVV3, which is a cryptographically-signed incrementing number), but I believe they can also just dumbly-send the normal card data over the air.
I've also seen credit cards made from glass. I think they're NFC-only, though, because of the thickness, but I could be mistaken.
You are correct in that the NFC is just a protocol but for it to be used without a signature you need a secure element. In their "mock-up" they show a smart car interface on the front and in the FAQ they claim EMV. It is very puzzling.
2. charge pumps can be made out of discrete components and the largest part is a coil, which can easily be laid flat and thin. You can also charge a ceramic cap (low self discharge) slowly and use it when you need to change screen contents, thus allowing you to have a smaller charge pump yet
3. PCBs can be made very thin (a cheap pcb fab I use will make 10 PCBs for $10 for me at 0.2mm thickness). And you can also make them on a flexcable that is thinner yet.
You are right about EMV though. It is supposed to be uncloneable.
1. With respect to e-ink on a flexible substrate... it was announced but I've never seen it happen. I've dealt with e-ink fairly recently on two projects. They don't have a flexible design to sell you beyond prototype. and for custom sizes Their MOQ to begin exploring a custom option is 100K units.
2. There is no coil in a charge pump :). They use capacitors and switches. There is no inductor. For a charge pump to drive an eink like screen you need caps of about 10-20uF. I've designed about 3 different boards that drive high-res e-ink screens. You can't get those caps below 1mm at the very best.
3. Are you sure you are getting 0.2mm PCBs? That is only 8mils thick! Most standard PCBs are 62 mils ~ 1.5mm. Can you tell me who these guys are that would do super thin at prototype prices? I would want to use them (no sarcasm).
Minimum IPC thickness for 4 layer board (which is what you need for the EPSON driver to those e-inks) is 12 mils but even at that you'll have mechanical problems with that PCB. Credit card thickness FYI is 30 mils = 0.030".
What I would say to these guys is: "show me a prototype with the appropriate thickness. You have a prototype, right?"
A prototype is a requirement here. Seeing the team, I see no technical person, but two brand designers (just the people to make a great demo video). Not to say they don't have someone who can pull this off, but it is a thing that has not been done before exactly. Like Lockitron, Coin, and others before, the variety of physical interfaces involved plus the need for it to work 100% of the time make this non-trivial. This is not just a neat digital interface problem.