Signet

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Nov 06, 2017

Enclosure Samples and Reliability Problem

Enclosure Samples

ICOMold has completed the mold and has created the initial set of samples. The samples should arrive in the mail this week, but they sent me this photo of the samples:

With a photo this low resolution it’s difficult to tell things like the quality of the surface finish, but there are a few important things I can see:

  • The assembled PCB sample I gave them appears to fit well in the enclosure.
  • There is no significant gap between the two halves of the enclosure so they were able to get a tight fit.
  • The bottom snap latches completely which should hold the enclosure together well in combination with the screw.

I will only be able to tell for sure when I get the parts in my hands later this week, but it’s looking likely that I should be able to approve the mold for production. I believe the parts will also be silkscreened, so I will share some high resolution photos of the production parts in a future update.

Reliability Problem

I’ve recently discovered that Signet devices can become unstable: I’ve noticed that, after spending some time in my pocket, the startup light will flicker upon insertion. Furthermore, in some cases, Signet would fail to recognize some button presses after having a startup problem. In all cases the device would recover over time while idle.

In the short term, it’s mostly an annoyance, but I’m concerned that the root cause may be damaging the device. I am committed to finding the exact cause of the problem and implementing a solution. There does not appear to be any shorts or damaged solder joints, so I’m looking at static discharge and power supply noise as possible causes. The solution may be as simple as swapping out a single capacitor on the board, in which case there should be no significant delay. I will write another update in about a week with updated findings.

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Product Choices

$45

Signet

A physically secure hardware password and personal information manager you can take with you wherever you go.

Signet device, single.

$95

Deluxe Pack

Two Signets, a USB extension cable, and a choice of a micro-USB or USB-C host adapter cable. You can give one Signet to a friend or keep one as a backup device.

Signet devices, two pack.

$8

USB Extension Cable

Helps keep your Signet close to your keyboard when the closest USB port is too far away. Can also reduce strain on the device's connector to increase its lifespan. 3'

USB Extension Cable

$8

Micro-USB Host Adapter Cable

Connects your Signet to a micro-USB Android device. 6"


$8

USB-C Host Adapter Cable

Connects your Signet to a USB-C Android device. 9"

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Credits

Nth Dimension


Neils Nesse

Creator

Jason Onada

Mechanical Designer


MacroFab

Contract Manufacturer

ICOMold

Injection Molding Manufacturer

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