Hackaday Prize Entry: Homebrew Smartwatches

The Pebble Smartwatch has been around for years, and the introduction of the Apple Watch has everyone looking at wrist-mounted computing as the newest gadget consumers can glom onto. There was never any doubt the 2015 Hackaday Prize would have more than a few smartwatches.

[Ramon]’s Zerowatch gets its name from the Arduino Zero, as this watch is based off of and completely compatible with the Arduino Zero. With a 48 MHz ARM Cortex M0+, a three-axis accelrometer, a microSD card slot, and a bright OLED display, this is an extremely capable wrist-mounted computer. As with all wearable electronics, the enclosure makes or breaks the entire device, and [Ramon] has a very slick 3D printed case for this watch.

Connectivity is important for smartwatches, and that’s something [Montassar]’s Open Source Smart Watch doesn’t skimp out on. He’s using an STM32F4 as the main controller and a 1.44″ TFT, and adding the standard Bluetooth module — an HC-05 — to the mix. [Montasar]’s project is also tackling connectivity by working on a few Android apps that connect directly to this phone. He’s using the MIT App Inventor to speed up development for these phone apps, and makes custom smartwatch apps a breeze.

Both are great projects, and thanks to free, open source, and easy to use tool chains, both projects are excellent examples of open hardware development and a great entry to The Hackaday Prize.

The 2015 Hackaday Prize is sponsored by:

It’s Time to Roll Your Own Smartwatch

Giant wristwatches are so hot right now. This is a good thing, because it means they’re available at many price points. Aim just low enough on the scale and you can have a pre-constructed chassis for building your own smartwatch. That’s exactly what [benhur] did, combining a GY-87 10-DOF module, an I²C OLED display, and an Arduino Pro Mini.

The watch uses one button to cycle through its different modes. Date and time are up first, naturally. The next screen shows the current temperature, altitude, and barometric pressure. Compass mode is after that, and then a readout showing your step count and kilocalories burned.

In previous iterations, the watch communicated over Bluetooth to Windows Phone, but it drew too much power. With each new hardware rev, [benhur] made significant strides in battery life, going from one hour to fourteen to a full twenty-fours.

Take the full tour of [benhur]’s smartwatch after the break. He’s open to ideas for the next generation, so share your insight with him in the comments. We’d like to see some kind of feedback system that tells us when we’ve been pounding away at the Model M for too long.  Continue reading “It’s Time to Roll Your Own Smartwatch”

Give In To Nostalgia With a Retro Game And Watch

One of the earliest Nintendo products to gain popularity was the Game and Watch product line. Produced by Nintendo between 1980 and 1991, they are a source of nostalgia for many an 80s or 90s kid. These were those electronic handheld games that had pre-drawn monochrome images that would light up to make very basic animations. [Andrew] loved his old “Vermin” game as a kid, but eventually he sold it off. Wanting to re-live those childhood memories, he decided to build his own Game and Watch emulator.

The heart of [Andrew’s] build is a PIC18F4550 USB demo board he found on eBay. The board allows you to upload HEX files directly via USB using some simple front end software. [Andrew] wrote the code for his game in C using MPLAB. His device uses a Nokia 5110 LCD screen and is powered from a small lithium ion battery.

For the housing, [Andrew] started from another old handheld game that was about the right size. He gutted all of the old parts and stuck the new ones in their place. He also gave the housing a sort of brushed metal look using spray paint. The end result is a pretty good approximation of the original thing as evidenced by the video below. Continue reading “Give In To Nostalgia With a Retro Game And Watch”

Tearing Down The Apple Watch

The Apple Watch has been out for nearly a month now, but so far we haven’t seen a good look at the guts of this little metal bauble of electronic jewelry. Lucky for us that a company in China is hard at work poking around inside the Apple Watch and putting up a few incredible SEM images along the way (Google Translatrix).

This isn’t the first Apple Watch teardown that’s hit the intertubes – iFixit tore one apart with spudgers and tiny screwdrivers and found someone skilled in the ways of tiny parts could probably replace the battery in this watch. Shocking for an Apple product, really. iFixit also took a look at the watch with an x-ray, revealing a little bit of the high-level design of the Apple Watch, the Apple S1 computer on a chip, and how all the sensors inside this wearable work.

A side view of a 6-DOF IMU
A side view of a 6-DOF IMU

This teardown uses an incredible amount of very high-tech equipment to peer inside the Apple Watch. Because of this, it’s probably one of the best examples of showing how these tiny sensors actually work. With some very cool images, a 6-DOF IMU is revealed and the Knowles MEMS microphone is shown to be a relatively simple, if very small part.

Now the Apple S1, the tiny 26.15mm x 28.50mm computer on a chip, serves as the brains of the Apple Watch. It’s breathtakingly thin, only 1.16mm, but still handles all the processing in the device.

Even if you won’t be buying this electronic accessory, you’ve got to respect the amazing amount of engineering that went into this tiny metal bauble of semiconductors and sensors.

Strapping an Apple II to Your Body

Now that the Apple wristwatch is on its way, some people are clamoring with excitement and anticipation. Rather than wait around for the commercial product, Instructables user [Aleator777] decided to build his own wearable Apple watch. His is a bit different though. Rather than look sleek with all kinds of modern features, he decided to build a watch based on the 37-year-old Apple II.

The most obvious thing you’ll notice about this creation is the case. It really does look like something that would have been created in the 70’s or 80’s. The rectangular shape combined with the faded beige plastic case really sells the vintage electronic look. It’s only missing wood paneling. The case also includes the old rainbow-colored Apple logo and a huge (by today’s standards) control knob on the side. The case was designed on a computer and 3D printed. The .stl files are available in the Instructable.

This watch runs on a Teensy 3.1, so it’s a bit faster than its 1977 counterpart. The screen is a 1.8″ TFT LCD display that appears to only be using the color green. This gives the vintage monochromatic look and really sells the 70’s vibe. There is also a SOMO II sound module and speaker to allow audio feedback. The watch does tell time but unfortunately does not run BASIC. The project is open source though, so if you’re up to the challenge then by all means add some more functionality.

As silly as this project is, it really helps to show how far technology has come since the Apple II. In 1977 a wristwatch like this one would have been the stuff of science fiction. In 2015 a single person can build this at their kitchen table using parts ordered from the Internet and a 3D printer. We can’t wait to see what kinds of things people will be making in another 35 years.

Continue reading “Strapping an Apple II to Your Body”

Open Source Binary Wristwatch Is Professional Quality

If you want to proclaim to the world that you’re a geek, one good way to go about it is to wear a wristwatch that displays the time in binary. [Jordan] designs embedded systems, and he figured that by building this watch he could not only build up his geek cred but also learn a thing or two about working with PIC microcontrollers for low power applications. It seems he was able to accomplish both of these goals.

The wristwatch runs off of a PIC18F24J11 microcontroller. This chip seemed ideal because it included a built in real-time clock and calendar source. It also included enough pins to drive the LEDs without the need of a shift register. The icing on the cake was a deep sleep mode that would decrease the overall power consumption.

The watch contains three sets of LEDs to display the information. Two green LEDs get toggled back and forth to indicate to the user whether the time or date is being displayed. When the time is being displayed, the green LED toggles on or off each second. The top row of red LEDs displays either the current hour or month. The bottom row of blue LEDs displays the minutes or the day of the month. The PCB silk screen has labels that help the user identify what each LED is for.

The unit is controlled via two push buttons. The three primary modes are time, date, and seconds. “Seconds” mode changes the bottom row of LEDs so they update to show how many seconds have passed in the current minute. [Jordan] went so far as to include a sort of animation in between modes. Whenever the mode is changed, the LED values shift in from the left. Small things like that really take this project a step further than most.

The board includes a header to make it easy to reprogram the PIC. [Jordan] seized an opportunity to make extra use out of this header. By placing the header at the top of the board, and an extra header at the bottom, he was able to use a ribbon cable as the watch band. The cable is not used in normal operation, but it adds that extra bit of geekiness to an already geeky project.

[Jordan] got such a big response from the Internet community about this project that he started selling them online. The only problem is he sold out immediately. Luckily for us, he released all of the source code and schematics on GitHub so we can make our own.

Doing Unsafe Things With A Laser Watch

[Pierce Brosnan]-era James Bond had a beautiful Omega wristwatch. Of course as with any Bond gadget, it couldn’t just tell time; it needed to do something else. This watch had a laser, and [Patrick] figured he could replicate this build.

This is apretty normal 1.5W laser diode build, stuffed into a wrist-mountable device that will kill balloons. This is really a watch, though: press a button and this thing will tell time.

In the video below, [Patrick] goes over what damage this watch can do. He manages to pop some black balloons, burn holes in a CD case, light a few matches, cut cellotape, and put tiny burn marks in his wall. The battery won’t last long – just a few minutes – but more than enough to propel [Patrick] into Youtube stardom.

There are no plans or tutorials for the build, but the teardown [Patrick] shows is pretty impressive. To stuff a laser diode, battery, and clock into a watch-sized compartment, [Patrick] needed to turn down the metal buttons to fit everything into his watch case.

Because the comments for this post will invariable fill up with concern trolls, we’re just going to say, yes, this is incredibly unsafe, no one should ever do this, and it probably kills puppies.