An array of open-source clocks that play Pac-Man (or Mrs. Pac-Man).

ESP32 Pac-Man Clock Keeps Track Of How Long You Watch It

November 23, 2021 by Kristina Panos 1 Comment

There are so many elements that make a good clock worth looking at for much longer than necessary. Not only is this clock quite cool to behold, it plays Pac-Man around the time! Yes, of course you can interact with the Pac-Man — touching the edges of the screen will make him go left, right, up, or down accordingly. You can also change to Ms. Pac-Man and make all the animations go normal speed, fast, or crazy-fast.

[TechKiwiGadgets] built a Pac-Man clock a few years ago that was well-received, but not cheap or easy to mimic. Since then, they have ported the code to the ESP32 and made a new version that has fewer and friendlier components. Not only that, they have great instructions for building the ESP32 shield on protoboard and also offer the shield as an open-source fab-able PCB. Still too much work? The complete kit version is available over on Tindie. Be sure to check it out in crazy speed mode action after the break.

Although this isn’t the first Pac-Man clock we’ve seen, it devotes equal attention to the time and the game, whereas this one is more about the game itself.

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The Tower, a discrete component circuit sculpture clock

A Breathtaking Circuit Sculpture Clock

November 10, 2021 by Dan Maloney 8 Comments

Here at Hackaday, we pride ourselves on bringing you the very freshest of hacks. But that doesn’t mean we catch all the good stuff the first time around, and occasionally we get a tip on an older project that really should have been covered the first time around. This remarkable circuit sculpture clock is a perfect example of one that almost got away.

[Gislain Benoit] creation is called “The Tower” for good reason: it’s built inside what amounts to a giant glass test tube. Inverted and adorned with MDF discs, the Pyrex tube stands 5 feet (1.5 meters) tall, and is absolutely stuffed with electronic goodness. There are more than 2,100 discrete components mounted inside on a helical framework of carefully bent wires, forming a vertical sculpture that displays the time on three separate pairs of seven-segment displays. All the diode-transitor logic circuits are built from discrete components; nary a chip was used, and to spice things up, [Gislain] used LEDs in place of regular diodes everywhere in the circuit. The result is a constant light show as the clock goes through its paces.

The whole thing looks amazing, and even the power supply at the base works in the overall presentation. The design is a bit of a departure from [Gislain]’s previous circuit sculpture clock, but it’s just as beautiful, and equally as mind-boggling in terms of construction difficulty.

Thanks to [Maarten] for the belated tip on this one.

Not Your Average Nixie Tube Clock

November 9, 2021 by Dan Maloney 10 Comments

When it comes to Nixie clocks, we all pretty much know what to expect: a bunch of Nixies with some RGB LEDs underneath, a wooden case of some sort, and maybe some brass gears or fittings for that authentic steampunk look. It’s not that we don’t appreciate these builds, but the convergent designs can be a little much sometimes. Thankfully, this 60-tube Nixie clock bears that mold, and in a big way.

The key to [limpkin]’s design is the IN-9 Nixie, which is the long, skinny tube that used to show up as linear indicators; think bar graph displays on bench multimeters or the VU meters on mixing boards. [limpkin] realized that 60 on the tubes could be arranged radially to represent hours or minutes, and potentially so much more. The length of the segment that lights up in the IN-9 is controlled by the current through the tube, so [limpkin] designed a simple driver for each segment that takes a PWM signal as its input. The job of a 60-channel, 14-bit PWM controller fell to an FPGA. An ESP8266 — all the rage five years ago when he started the project — took care of timekeeping and control, as well as driving a more traditional clock display of four 7-segment LEDs in the center of the clock face.

The custom PCB lives in a CNC-machined MDF wood face; the IN-9s shine through slots in the face, while the seven-segment display shows through a thinned area. It looks pretty cool, and there are a lot of display options, like the audio spectrograph shown in the video below. We’re glad [limpkin] decided to share this one after all this time.

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Vintage Computers With A Real Turbo

November 3, 2021 by Bryan Cockfield 42 Comments

In prior centuries, it was common practice to tie the operation of a program to a computer’s clock speed. As computers got faster and faster, the programs tied to that slower clock speed sometimes had trouble running. To patch the issue temporarily, some computers in the early 90s included a “TURBO” button which actually slowed the computer’s clock speed down in order to help older software run without breaking in often unpredictable ways. [Ted Fried] decided that he would turn this idea on its head, though, by essentially building a TURBO button into the hardware of old computers which would greatly increase the execution speed of these computers without causing software mayhem.

To accomplish this, he is running CPU emulators on Teensys (Teensies?), but they are configured to be a drop-in replacement for the physical CPU of several retro computers such as the Apple II, VIC-20, and Commodore 64 rather than an emulator for an entire system. It can be configured to run either in cycle-accurate mode, making it essentially identical to the computer’s original hardware, or it can be placed into an accelerated mode to take advantage of the Teensy 4.1’s 800 MHz processor, which is orders of magnitude faster than the original hardware. This allows (most of) the original hardware to still be used while running programs at wildly faster speeds without needing to worry about any programming hiccups due to the increased clock speed.

The video below demonstrates [Ted]’s creation running in an Apple II but he has several other cores for other retro computers. It’s certainly a unique way to squeeze more computing power out of these antique machines. Some Apple II computers had a 4 MHz clock which seems incredibly slow by modern standards, so the 800 MHz Teensy would have been considered wizardry by the standards of the time, but believe it or not, it’s actually necessary to go the other direction for some applications and slow this computer down to a 1 MHz crawl.

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Oscilloscope Clocks: Now In Color!

October 28, 2021 by Adam Zeloof 5 Comments

Ordinarily, when we hear the words “clock” and “oscilloscope” in the same sentence we conjure images of measuring a stable, repeating square wave that acts as the heartbeat of a system. Of course, that’s not the only meaning– there’s a much more fun and less useful one: using an oscilloscope to display the time.

That’s what [Wolfgang Friedrich] set out to do when he cobbled some protoboard, probes, and an FPGA into the Multi Color Oscilloscope Clock. Each digit on the clock is treated like a seven-segment display, made up of three horizontal bars and four vertical bars. The horizontal bars are generated by constant voltage at different levels, and the vertical bars are generated by quickly switching between two voltages. [Wolfgang] decided to use an R-2R resistor ladder DAC to create the appropriate analog signals from the FPGA’s digital outputs. For bonus points, each set of digits (hours, minutes, and seconds) are output concurrently through separate channels, so they can be displayed in different colors on the screen of his four-channel scope (the fourth channel is used for the points between numbers).

Misusing oscilloscopes in the name of fun has become a time-honored tradition– from Tennis for Two back in 1958 (which later became the beloved Pong) to the plethora of analog o-scope clocks we’ve seen, it’s clear that hackers just can’t get enough of the unique vector display style that a scope can provide. We love [Wolfgang]’s idea of using the scope’s channels to create a multi-color display, and we’re left wondering what kind of wacky waveforms we’ll be seeing next.

Halloween-Themed Talking Clock Relies On Pi Pico

October 27, 2021 by Lewin Day 3 Comments

Many of us learn to read clocks at a young age, however, talking clocks eliminate the need to do that entirely. [Alberto] whipped up one of his own, in this case designed with some Halloween holiday spookiness.

A basic clock movement is used to display the time in the typical fashion. However, the movement also features a built-in trigger signal, which it sends to an attached microcontroller on the hour, every hour. The build relies on the Raspberry Pi Pico for sound, chosen for its USB programming interface and its 2 MB of onboard flash storage. Sound is stored in simple 16-bit WAV files, and played out to a speaker via a PWM output. Alternatively, a CircuitPython version of the code is available that uses MP3s instead. A light sensor is used to avoid triggering any sounds at night time that could disturb one’s sleep. The entire circuit can be built on a single-sided board. [Alberto] etched one at home in the old-fashioned way, though one could also order one online, too.

Halloween is an excellent time for hacks, and this year we have the Halloween Hackfest contest to show them off. It’s ending soon though, you have until the stroke of midnight Pacific time on Friday (that’s the moment Thursday night ends) to enter your Halloween-themed hacks.

Talking clocks have been around for some time, but are nevertheless a fun and educational project to build. We’ve seen some other great Halloween hacks lately, too. If you’ve been busy with projects this fall holiday, don’t hesitate to drop us a line!

A tiny bedside clock that's packed with features.

ESP32 Clock Takes Time To Give Weather Info, Too

October 27, 2021 by Kristina Panos 9 Comments

It’s fall in the northern hemisphere, so [Mike Rankin]’s kids are back in school and have returned to consulting him every morning about the weather and what they should wear. Since he’s no meteorologist, [Mike] built a beautifully dim and diminutive clock that does all the work for him, plus much more. It glows a lovely dark orange that’s perfect for the nightstand and those early morning interrogations.

In default mode, this clock displays the time, CO2 level, room temperature, and humidity in that eye-friendly orange. But wave your hand in front of the time of flight sensor, and it goes external, displaying the low and high temperatures for the day, plus the weather conditions forecast. After a few seconds of that, it goes back to default mode. The ESP fetches the time from an NTP server, then gets the weather from the OpenWeather API. The indoor weather comes from a combination sensor on the board.

Inside this tiny package is a beautifully-spun board with an ESP32 Pico D4 for a brain. In addition to the climate sensors there is a combination CO2/TVOC sensor (that’s total volatile organic compounds) to sniff out danger. There is also a pair of push buttons on the back and an ambient light sensor, but [Mike] isn’t using those just yet. Add in the Qwiic connector for future doo-dads, and you have quite the little gadget. Although the pictures make it look kind of big, you can see exactly how small it is in the demo video after the break.