eInk Display for Octopus's Agile Energy Tariff

An eInk screen with a line graph on it. The graph shows the current price of power. The eInk is mounted in a wooden frame.

I'm a little bit obsessed with building eInk displays. They're pretty cheap second hand. They're low energy, passive displays, with good-enough performance for occasional updates. Here's a new one which shows me what the current cost of my electricity is: Background After installing solar panels, a smart electricity meter, and a solar battery - the […]

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An eInk, Wrist-Mounted, TOTP Generator

A chunky wristwatch showing the time and a selection of 6 digit codes and their corresponding entities.

Behold! Thanks to the power of the Watchy development platform, I now have all my 2FA codes available at the flick of my wrist! HOWTO This uses Luca Dentella's TOTP-Arduino library. You will need a pre-shared secret which is then converted into a Hex array. Use the OTP Tool for Arduino TOTP Library to get […]

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Stupidly Small eInk Font

A chunky eInk watch with a ridiculously small font.

I have the new Watchy eInk watch. It has a cute little screen with a resolution of 200x200 pixels. How much text can we cram in there? A typical watch face looks like this: My new watch face is far superior and looks like this: That's using the GNU Unifont - which works brilliantly on […]

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Combining 3 transport APIs for one info screen

An eInk screen which is displaying the times until the next bus, what delays there are on the tube, and then a bunch of train departure times.

Last year, I blogged about how I turned an old eReader into an Information Screen. I've since updated the display to show me three different sets of transport information. At a glance, I can see the next bus, whether there are delays on the Elizabeth Line, and if my regular trains are running. Here's how […]

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Review: Watchy - an eInk watch full of interesting compromises

Watch with a big USB cable plugged in.

The last smartwatch that I tried was some awful early Sony device with a locked-down ROM. The battery died after a day and I couldn't find the proprietary charger. It slurped up all my data. It was garish to look at. And it was expensive. The Watchy is the opposite in every single conceivable way. […]

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Turning an eInk screen into a monochrome art gallery

Previously on Terence Eden's Blog: I turned an old eReader into an Information Screen. This time, I'm taking a different Nook, and turning it into a magic gallery. Here's what it looks like in action: Upcycled an old eReader into an art frame.Displays a new black & white piece of art from Flickr every few […]

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KOReader - change forward and back to bottom and top

(Mostly notes to myself) KOReader is the best eReader software I've found. It works beautifully on eInk screens, Android, and Linux. Just a gorgeous - and infinitely customisable - experience. There's one thing I don't like - to move forward a page, you have to click the right of the screen and, to move back, […]

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Discolouration of Boyue eInk screens

Discoloured corner.

A little under a year ago, I got a Boyue Likebook Ares eReader. I use it most days. Recently, I noticed a yellowing discolouration around the edge of the screen. I've boosted the contrast of those images. It's the sort of thing the human eye can detect under decent light, but cameras struggle with. At […]

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Turn an old eReader into an Information Screen (Nook STR)

Nook with a train display.

Here's a quick tutorial for turning an old Nook into a passive display. This is an update to my 2013 post End Result An eInk screen which displays the trains I can catch from my local station. It shows the next few available trains, and whether they're delayed. It also shows how long until the […]

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Gadget Review - Boyue Likebook Ares

An eReader with a pen.

I'll be upfront, I mostly got this eReader because it's the only one on the market with a USB-C connection. OK! OK! That's not the main reason. It has pretty good support from the manufacturer and a vibrant community around it. Masses of memory, warm lighting, and oodles of space. And, I think, pretty hackable. […]

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