The Three Week Three Dollar Binary Watch

There’s a Maker Faire in three weeks, and your group wants to design and build a binary watch to give to attendees. You don’t have much time, and your budget is $3 per watch. What do you do? If you are [Parker@Macrofab] you come up with a plan, buy some parts, and start prototyping.

[Parker] selected the PIC16F527 because it had enough I/O and was inexpensive. A cheap crystal and some miscellaneous discrete parts rounded out the bill of materials. Some cheap ESD straps would serve for a band. He did the prototype with a PICDEM board and immediately ran into the bane of PIC programmers: the analog comparators were overriding the digital I/O pins. With that hurdle clear, [Parker] got the rest of the design prototyped and laid a board out in Eagle.

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Texel: Art Tracks You, Tracks Time

French robot-artist [Lyes Hammadouche]  tipped us off to one of his latest works: a collaboration with [Ianis Lallemand] called Texel. A “texel” is apparently a time-pixel, and the piece consists of eight servo-controlled hourglasses that can tip themselves over in response to viewers walking in front of them. Besides making graceful wavelike patterns when people walk by, they also roughly record the amount of time that people have spent looking at the piece — the hourglasses sit straight up when nobody’s around, resulting in a discrete spatial representation of people’s attentions to the piece: texels.

We get jealous when we see artists playing around with toys like these. Texel uses LIDAR scanners, Kalman-filtered naturally, to track the viewers. openFrameworks, OpenCV, and ROS. In short, everything you’d need to build a complex, human-interactive piece like this using completely open-source tools from beginning to end. Respect!

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Light Up Your Day With This LED Clock

We love clocks, and [Chris] got our attention with the internet enabled Light Clock. Time is displayed via RGB LED strip in a number of different ways around a 3D printed white disk. All the modes are based on two selectable colors to indicate hours and minutes, either in a gradient fashion or a hard stop.

Light is provided by a 144 LED neopixel strip and is powered by a beefy 4 amp 5 volt power supply, which also powers the controller. Brains are provided by a ESP8266 powered NodeMCU-12E board, and software is written using ESP8266 for Arduino core.

Being a WiFi enabled micro controller it is a simple matter of connecting to the clock using WiFi and using the embedded web pages to select your local timezone, color palette, and display mode. The correct time is set by network and will never be wrong. While there is a Kickstarter for selling the finished project, instructions and software are provided for making your own if you wish.

Join us after the break for the promotional Kickstarter and demonstration video

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Chromatic Clocks With A Steampunk Twist

There’s nothing like a good clock project, and tacking the steampunk modifier on it only makes it better. [José] built a steampunk clock that does it much better than just gluing some gears on an enclosure and calling it a day. This build includes glowing jewels displaying the time in different colors while displaying the a steampunker’s prowess with a pipe cutter.

The body of the clock is a piece of finely lacquered wood, hiding a perfboard construction with a DS3231 real time clock, a DHT22 temperature and humidity sensor, and a light sensor for dimming the WS2812 LEDs according to the ambient light level.

The rest of the clock is a bunch of 12mm copper pipe, elbows, and t couplers. The end of these pipes are capped off with marbles, with the RGB LEDs behind each of the ‘digits’ of the clock. This is a chromatic clock, with the digits 0 through 9 assigned a different color, based on the resistor color code scheme with exceptions for black and brown. Once you’ve figured out how to tell time with this clock, you should have no problem finding that single 56k resistor in your junk box.

You can check out the video of the clock below.

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Light Duty Timekeeping: Arduino Berlin Clock

Just when we thought we’d seen all the ways there are to tell time, along comes [mr_fid]’s Berlin clock build. It’s based on an actual clock commissioned by the Senate of Berlin in the mid-1970s and erected on the famous Kurfürstendamm avenue in 1975. Twenty years later it was decommissioned and moved to stand outside the historic Europa-center.

This clock tells the time using set theory and 24-hour time. From the top down: the blinking yellow circle of light at the top indicates the passing seconds; on for even seconds and off for odd. The two rows of red blocks are the hours—each block in the top row stands for five hours, and each block below that indicates a single hour. At 11:00, there will be two top blocks and one bottom block illuminated, for instance.

The bottom two rows show the minutes using the same system. Red segments indicate 15, 30, and 45 minutes past the hour, making it unnecessary to count more than a few of the 5-minute top segments. As with the hours, the bottom row indicates one minute per light.

Got that? Here’s a quiz. What time is it? Looking at the picture above, the top row has three segments lit. Five hours times three is 15:00, or 3:00PM. The next row adds two hours, so we’re at 5:00PM. All of the five-minute segments are lit, which adds 55 minutes. So the picture was taken at 5:55PM on some even-numbered second.

The original Berlin clock suffered from the short lives of incandescent bulbs. Depending on which bulb went out, the clock could be ‘off’ by as little as one minute or as much as five hours. [mr_fid] stayed true to the original in this beautiful build and used two lights for each hour segment. This replica uses LEDs driven by an Arduino Nano and a real-time clock. Since the RTC gives hours from 0-23 and minutes and seconds from 0-59, a couple of shift registers and some modulo calculations are necessary to convert to set theory time.

[mr_fid] built the enclosure out of plywood and white oak from designs made in QCAD. The rounded corners are made from oak, and the seconds ring is built from 3/8″ plywood strips bent around a spray can. A brief tour of the clock is waiting for you after the break. Time’s a-wastin’!

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Absurd Clock uses Twelve ESP8266 Modules

Quick quiz: How many ESP8266 modules do you need to make an LED clock? Hint: a clock displays 12 hours.

Nope! Twelve is not the answer. But that didn’t stop Hackaday.io user [tamberg] from building a 12-ESP clock during the Bilbao, Spain Maker Faire. The “advantage” of using so many ESP8266s is that each one can independently control one hour LED and its associated slice of five minute-marker LEDs. Each ESP fetches the time over the Internet, but only lights up when it’s time.

It’s like parallel processing or something. Or maybe it’s redundant and failsafe. Or maybe it’s just an attempt to put the maximum Internet into one Thing. Maybe they had a team of twelve people and wanted to split up the load evenly. (We couldn’t think of a real reason you’d want to do this.)

All snark aside, the project looks great as you can see in this Flickr gallery, and all of the design files are available if you’d like to re-use any parts of this project. We’re thinking that the clock face is pretty cool.

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A Clockwork Cradle is Baby’s First Escapement

[Scott] doesn’t have any kids, but he’s the sort of type that likes to get ahead of the game. Of course this means spending time in his garage to build a rocking cradle. Usually, these are acquired from a baby shower and are powered by batteries. Terribly uncool, considering a mechanism to keep a pendulum swinging has existed for hundreds of years now. His latest project is the escapement cradle – a cradle (or hammock) that keeps rocking with the help of falling weights.

cradle-escapementThe first video in this series goes over the inspiration and the math behind determining how much energy it will take to maintain a swinging pendulum. The second video goes over a very rough prototype for the escapement mechanism with some woodworking that looks dangerous but is kept well under control. The third video puts everything together, rocking a cradle for about 10 minutes for every time the weight is lifted to the top.

[Scott] has had a few of his projects featured on Hackaday, and he’s slowly becoming the number two mechanized woodworker, right behind [Matthais]. He recently put the finishing touches on the expanding wooden table we saw a year ago, and there are surely even cooler builds in the queue for his YouTube channel.

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