In a kind of reverse twist on the doorbell, [TheStaticTurtle] whipped up a system to mute his computer’s microphone whenever someone opens the door to his room. He lives in France, where the government announced a strict lockdown last Friday. Like many university students around the world these days, he is now forced to take online classes. Even though he has his own room, occasionally someone will barge in and announce something, often to [TheStaticTurtle]’s embarrassment. When his classmates suddenly heard “Do you want some pie?” the other day, it was the last straw.
His first decision was to sense the door opening with a magnet and sensor, which he stuck to the door and frame with hot glue. He then ran a long cable to his desk, where it connected to an ATTiny 85 with a DigiSpark boot-loader. He wrote firmware to simulate special key combinations, which were then registered with his audio routing software Voicemeeter Potato. We presume he isn’t using an external mic, in which case muting might have been easier to accomplish with a hardware switch. All in all, this is a pretty clever and timely hack. Should you be in a similar predicament and want to try this out, he’s published the source code on GitHub.
Continue reading “Door Mutes Microphone To Prevent Remote Learning Humiliation”
As the world settles into this pandemic, some things are still difficult to mentally reckon, such as the day of the week. We featured a printed day clock a few months ago that used a large pointer to provide this basic psyche-grounding information. In the years since then, [Jeff Thieleke] whipped up a feature-rich remix that adds indoor air quality readings and a lot more.
Like [phreakmonkey]’s original day tripper, an ESP32 takes care of figuring out what day it is and moves a 9 g servo accordingly. [Jeff] wanted a little more visual action, so the pointer moves a tad bit every hour. A temperature/humidity sensor and a separate CO₂ sensor output their readings to an LCD screen mounted under the pointer. Since [Jeff] is keeping this across the basement workshop from the bench, the data is also available from a web server running on the ESP32 via XML and JSON, and the day clock can get OTA updates.
Need a little more specificity than just eyeballing a pointer? Here’s a New Times clock that gives slightly more detail.
We all have our new and interesting challenges in lockdown life. If you’ve had to relocate to ride it out, the chances are good that even your challenges have challenges. Lockdown left [Kanoah]’s sister in the lurch when it came to feeding her recently-adopted pet rat, so he came up with a temporary solution to ensure that the rat never misses a meal.
Most of the automated pet feeders we see around here use an auger to move the food. That’s all fine and good, but if you just need to move a singular mass, the screw seems like overkill. [Kanoah]’s feeder is more akin to a pellet-pushing piston. It runs on a Metro Mini, but an Arduino Nano or anything with enough I/O pins would work just fine. The microcontroller starts counting the hours as soon as it has power, and delivers pellets four times a day with a servo-driven piston arm. [Kanoah] has all the files up on Thingiverse if you need a similar solution.
There many ways of solving the problem of dry pet food delivery. Wet food is a completely different animal, but as it turns out, not impossible to automate.
After this pandemic thing is all said and done, historians will look back on this period from many different perspectives. The one we’re most interested in of course will concern the creativity that flourished in the petri dish of anxiety, stress, and boredom that have come as unwanted side dishes to stay-at-home orders.
[Hunter Irving] and his brother were really missing their friends, so they held a very exclusive hackathon and built a terrifying telepresence robot that looks like a mash-up of Wilson from Castaway and that swirly-cheeked tricycle-riding thing from the Saw movies. Oh, and to make things even worse, it’s made of glow-in-the-dark PLA.
Now when they video chat with friends, TELEBOT is there to make it feel as though that person is in the room with them. The Arduino Uno behind its servo-manipulated vintage doll eyes uses the friend’s voice input to control the wind-up teeth based on their volume levels. As you might imagine, their friends had some uncanny valley issues with TELEBOT, so they printed a set of tiny hats that actually do kind of make it all better. Check out the build/demo video after the break if you think you can handle it.
Not creepy enough for you? Try building your own eyes from the ground up.
Continue reading “Nightmare Fuel Telepresence ‘Bot May Become Your Last Friend”
Just as 3D printers around the world have been churning out face shields, the thread injectors of home sewists have been stitching up fabric masks. Over the past several weeks, [Becky Stern] has made them for friends, family, neighbors, and anyone in her community who happens upon the box of free masks she’s left at a nearby bus stop. This is in addition the scores she has made and donated to health care workers so they can extend the life of their N95 masks.
If you’re going to make more than a few of anything, it just makes sense to make multiples at the same time and adjust the process for batch production. [Becky Stern] has some great ideas for ramping up assembly even further that include cutting out multiple main mask pieces at the same time, and ironing the pleats of several masks round robin style so you don’t waste time while they cool.
Even if you don’t dabble in the fabric arts, her method of kitting out the process of mask making is an interesting look into small-scale production.
Our favorite idea concerns the side bindings and the straps, which are the last part of the build and take the longest to do. [Becky] makes several miles of straps ahead of time with a 3D printed bias tape folder and then sews them all into a continuous strip. She can add the short side bindings to a bunch of masks at once, feeding them in one after the other so they end up strung together like sausages. Then she can just snip them apart and keep going, having saved both time and thread. Watch [Becky] make a single mask after the break and see how easy it is.
If sewing is a no-go for you, there are plenty of ways to help the PPE effort by firing up that printer.
Continue reading “Mass Mask-Making Masterclass”
With all the hands-free dispenser designs cropping up out there, the maker world could potentially be headed for an Arduino shortage. We say that in jest, but it’s far too easy to use an Arduino to prototype a design and then just leave it there doing all the work, even if you know going in that it’s overkill.
[ASCAS] took up the challenge and built a cheap and simple dispenser that relies on recycled parts and essential electronics. It uses an IR proximity sensor module to detect dirty digits, and a small submersible pump to push isopropyl alcohol, sanitizer, or soap up to your hovering hand. The power comes from a sacrificial USB cable and is switched through a transistor, so it could be plugged into the wall or a portable power pack.
We admire the amount of reuse in this project, especially the nozzle-narrowing ballpoint pen piece. Be sure to check out the build video after the break.
Hopefully, you’re all still washing your hands for the prescribed 20 seconds. If you’re starting to slip, why not build a digital hourglass and watch the pixels disappear?
Continue reading “An Arduino-Free Automatic Alcohol Administrator”
We don’t know about you, but we’re pretty tired of singing two rounds of “Happy Birthday” or counting Mississippi to 20 each time we wash our hands. It’s difficult to do it without thinking about the reason why, and that’s not good for positivity. If you’d rather have your spirits lifted every time you hit the sink, you need a better soundtrack.
[Deeplocal] made a soap dispenser that gathers one of your top 20 tunes from Spotify and plays it for 20 seconds while you lather. The best part is that the songs don’t start at 0:00 — the code is written to use the preview clip of each one, so you get the algorithmically-determined best part.
Scrubber is a pretty simple build that uses a Raspberry Pi Zero W and a speaker bonnet powered by a LiPo, but we dig it just the same. The switch is adaptable to pretty much any soap dispenser — just stick two pieces of copper tape where they’ll make contact when the pump is pushed down, and solder wires to them. Check out the demo after the break.
We’ve often wondered how much more water we’re using with all the increased hand-washing out there. Adjusting to this apocalypse is arduous for all of us, but the environment is still a concern, so try to remember to turn the water off while you’re not using it. Is anyone out there working on an easy way to adapt home faucets to add motion or foot control? Because that would be awesome right about now.
The nice thing about Scrubber is that you can focus on washing your hands and doing so properly. If you’d rather watch a digital hourglass to pass the time, light up your lockdown lavatory lifestyle with LEDs.
Continue reading “Rock Out While You Knock Out Germs”