All the hardcore geeks have alarm clocks where the bell striker is a hard disk read head… or at least they’ll be building them after seeing this. [Senile Data Systems] created an industrial voltage alarm clock out of decade counters that looks like it was unearthed from a fallout shelter (machine translation).
At first glace you might mistake this for a binary clock since it uses a column of LEDs to indicate each digit of 24-hour time. It’s not, as each row corresponds to a pin on the CD4017 decade counters that make up the timekeeping circuit inside.
screw wheel switches at the top of the bulky handheld unit are how the alarm time is set, triggering a bell along the top edge. The clock is driven by the 50 Hz line voltage and [SDS] tried using that AC to drive a solenoid as the striker on the prototype unit but it performed poorly. The use of a hard disk read head turns out to be the perfect striker, as heard in the video after the break. As for triggering from the decade counters, here’s what [SDS] told us about the design:
The switches’ outputs gets ANDed with a 10 Hz signal (on a 60 Hz grid it will become 12 Hz). This drives a slightly beefy transistor which in turn drives an electromagnet to hammer a bell which broke off my bicycle. Yes. This is a digital analog alarm clock. The clock portion is digital but the bell is analog and sounds like Grampa’s old wind up alarm clock.
The build came about when a cache of over 600 industrial LEDs (24 V – 48 V) fell into his lap. This makes the insides of the clock something to behold as point-to-point soldering connects the panel mount lights and all nine logic chips. Add in that transformer for getting the line voltage and we imagine this thing has quite a bit of heft to it.
If you’ve ever had an alarm with a wind-up bell you know there’s no better way to jolt yourself out of a peaceful slumber and into the chaos of the real world. If the gentle tinkle of the hard drive head isn’t enough for you, this fire bell alarm clock will certainly do the trick.
Continue reading “Breathtaking Alarm Clock Looks Like It Came From A 1960 Fallout Shelter”
Hackaday editors Mike Szczys and Elliot Williams discuss the many great hacks of the past week. Just in case you missed the fact that we’re living in the cyberpunk future, you can now pop off your prosthetic hand and jack directly into a synthesizer. The robot headed for Mars has a flying drone in its belly. Now they’re putting foaming agent in filament to make it light and flexible. And did you ever wonder why those pinouts were so jumbled?
Take a look at the links below if you want to follow along, and as always tell us what you think about this episode in the comments!
Direct download (~60 MB)
Places to follow Hackaday podcasts:
Continue reading “Hackaday Podcast 055: The Most Cyberpunk Synthesizer, Data In Your Cells, Bubbly In Your Printer, And The Dystopian Peepshow”
The ESP family of microcontrollers is absolutely on fire right now, with a decent chunk of the projects that come our way now based on one of the impossibly cheap WiFi-enabled boards. In fact, they are so cheap and popular that we’ve started to see a somewhat unexpected trend; people have a tendency to use them as drop-in replacements, despite the more modern boards being considerably more powerful than required. The end result is a bunch of projects in which the ESP is simply underutilized. It’s not a big deal, but somewhat disappointing to see.
But we can assure you this ESP32 alarm clock created by [Pangodream] is absolutely not one of them. He’s packed an impressive number of features into this unassuming little timepiece, and it’s really an excellent example of how much these boards are capable of without breaking a sweat. From DIY touch sensors to the Android application used to configure the clock over the network, this project is overflowing with neat hardware and software tricks worth taking a closer look at.
Inside the 3D printed case, the clock features a BH150 light sensor, the very popular DHT-11 for detecting temperature and humidity, as well as a ILI9341 2.8 inch LCD for the display. In a particularly clever touch (get it?), [Pangodream] used three coins connected to the digital pins of the ESP32 as capacitive sensors. These allow him to interact with the click just by tapping the top of the case, and saved him the trouble of adding traditional switches or buttons. We might have put some indentations in the top case to make identifying which of the three “buttons” you’re pushing, but we suppose the invisible interface does make things look a little more futuristic.
But if even that is too much physical touching for you, then [Pangodream] has come up with a fairly robust system for controlling and interacting with the clock over the network. It’s not just a convenient way of setting the time, a good number of the clock’s functions can be polled and configured in this manner; everything from the sensitivity of the touch sensors to how many times it will beep when the alarm goes off. To make things easier, he’s even wrapped it all up in a handy Android application for on the go configuration.
If this clock doesn’t offer you the level of over-engineering you require, check out this build that uses no less than five ESP32s to get the job done. Or maybe this one that hooks into NASA’s Deep Space Network.
Continue reading “ESP32 Alarm Clock Doesn’t Skimp On The Features”
The old-fashioned alarm clock was a staple of cartoons in years past, with loud clanging bells and slap-to-shutoff functionality. Despite being an excellent dramatic device, these classic timepieces began to lose favor to the digital clock radio, and, in more recent times, the smartphone alarm. However, [LenkaDesign] has come up with this excellent build that combines the best of the old and the new.
The build starts with an old alarm clock. The clockwork internals are removed, but the bells remain, powered instead by a brushed DC motor. An Arduino Nano is the brains of the operation, interfacing with the now-ubiquitous temperature, humidity and barometric pressure sensors. Time is displayed on a Nokia 5110 LCD screen of the type popular a decade ago when options for small hobby project displays were significantly more limited then they are today.
As a nice touch, an old circuit board lends a new face to this clock, with a trio of big chunky buttons to act as controls. The LCD uses attractive icons to help convey information, making the most of the graphical capabilities available. There’s even a rudimentary weather forecasting algorithm that uses barometric pressure changes to predict the likelihood of rain.
Overall, it’s a tidy build that promises to serve as a great alarm clock, given the high volume of the original bells. Alarm clocks have always been a hacker staple, but if you’re still struggling to get out of bed this fire bell build should rattle your fillings loose on a daily basis. Video after the break.
[Thanks to Baldpower for the tip!]
Continue reading “Weather Forecasting Clock Makes An Almighty Racket”
The ticking clock on the bomb is a Hollywood trope that simply refuses to die. Adding to the stress levels of the bomb squad and creating great suspense for the watcher, it’s always interesting to wonder why the average bomb maker is so courteous as to supply this information to law enforcement. Regardless, if you’d like to build a dramatic prop and are mature enough to do so responsibly, [Giorgio] has the guide you need.
The build is a straightforward one, relying on an Arduino to run the show. This is hooked up to a classic 7-segment LED display, upon which the countdown is displayed. For extra flair, an MP3 player is fitted to play the Mission Impossible theme. It all adds to the tension as you wipe the sweat from your brow, trying to decide if you’re cutting the right wire.
It’s a build that would be an excellent prop for a film production or a fun game at a holiday party. However, it’s also a build that could easily be mistaken for the real thing by those less technically inclined. Even the most innocuous homebrew projects have caused problems for innocent hackers in the past. Fake bombs can be incredibly dangerous, just like the real thing, so it’s important to be careful.
We’ve seen other takes on this kind of build before, too. As always, build responsibly.
Among all the timepieces that we feature here at Hackaday, surprisingly we bring you relatively few clocks. That might seem an incomprehensible statement given the plethora of, well, clocks, that appear here, but it’s one that hinges upon the type of clock. Electronic clocks of extreme skill, complexity, and beauty, yes, but traditional mechanical clocks? Not so many.
So [Thonemeister]’s wall-mounted brass alarm clock was a welcome sight on our tips line, and his write-up is a fascinating exposition of the path taken by a novice clockmaker on their first build. He starts by describing his workshop, then steps methodically through each of the constituent parts of the clock.
We see the frame, escapement mechanism, gears, and movement taking shape, and we learn something about clockmaker’s tools from the pitfalls he encountered. He was a complete lathe novice at the start of this build, and it’s fun to follow along with his learning curve. As we see thed finished clock taking shape, we even get to see the little touches like forming the hooks for the weights. He bought the bell for the clock off-the-shelf, not wishing to expend the considerable piece of brass stock it would have taken to machine it himself. But for the most part, this is an engaging scratch build you won’t want to miss.
Many of us will never make a traditional clock. But that need not stop us finding the work that goes into one an extremely fascinating read. We have more for you if this has whetted your appetite: you’ll be interested in the escapement mechanism, and if brass is a bit much, how about wood?
Earlier in March we heard about a quirk of the interconnected continental European electricity grid which caused clocks to lose about six minutes so far this year. This was due to a slight dip in the mains frequency. That dip didn’t put anything out of commission, but clocks that are designed to accumulate the total zero-crossings of the power grid frequency of 50 Hz don’t keep accurate time when that frequency is, say 49.985 Hz for an extended period of time.
An interesting set of conversations popped up from that topic. There were several claims that modern alarm clocks, and most devices connected to mains, no longer get their clock timing from mains frequency. I’ve looked into this a bit which I’ll go into below. But what we really want to know is: are your alarm clocks and other devices keeping time with the grid or with something else?
Continue reading “Ask Hackaday: Is Your Clock Tied To Mains Frequency?”