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Team Scores Big Points with Pinball Final Project
https://hackaday.com/2019/12/25/team-scores-big-points-with-pinball-final-project/

For their final project in [Bruce Land]’s class on designing with PIC32 microcontrollers, [Sujith], [Julia] and [Andrew] wanted to do something fun. And what could be more fun than bending to the electromechanical siren song of the pinball machine?
This machine looks great, and as you can see in the …read more (https://hackaday.com/2019/12/25/team-scores-big-points-with-pinball-final-project/)
Need Hackable Melodies? Here’s The TETRIS Theme and More
https://hackaday.com/2019/12/25/need-hackable-melodies-heres-the-tetris-theme-and-more/

[Robson Couto] started to get interested in musical projects and as a side effect created downloadable code with simple notation for a good variety of themes, songs, and melodies. They are all for the Arduino and use only the built-in tone() function, but don’t let that distract you. If you …read more (https://hackaday.com/2019/12/25/need-hackable-melodies-heres-the-tetris-theme-and-more/)
Honoring Chuck Peddle; Father of the 6502 and the Chips That Went with It
https://hackaday.com/2019/12/25/honoring-chuck-peddle-father-of-the-6502-and-the-chips-that-went-with-it/

Chuck Peddle, the patriarch of the 6502 microprocessor, died recently. Most people don’t know the effect that he and his team of engineers had on their lives.  We often take the world of microprocessor for granted as a commonplace component in computation device, yet there was a time when there …read more (https://hackaday.com/2019/12/25/honoring-chuck-peddle-father-of-the-6502-and-the-chips-that-went-with-it/)
Finishing FDM Prints with SLS Resin
https://hackaday.com/2019/12/25/finishing-fdm-prints-with-sls-resin/

[Thomas Sanladerer] has a filament-based 3D printer and a resin one. Can the two types of raw material combine to make something better? [Thomas] did some experiments using some magnets to suspend the parts and a hot air soldering gun to heat things up.
The trick turns out to be …read more (https://hackaday.com/2019/12/25/finishing-fdm-prints-with-sls-resin/)
A Car That Runs On Homemade Chemical Reactions
https://hackaday.com/2019/12/25/a-car-that-runs-on-homemade-chemical-reactions/

The race for chemical engineering is quite literally on. Every year, the American Institute of Chemical Engineers (AlChE) brings together hundreds of university students to face-off to design the fastest car using techniques they’ve learned from chemical engineering courses.
The Chem-E-Car competition races cars which are only powered by chemical …read more (https://hackaday.com/2019/12/25/a-car-that-runs-on-homemade-chemical-reactions/)
DIY Scalar Network Analyzer
https://hackaday.com/2019/12/25/diy-scalar-network-analyzer/

[Steven Merrifield] built his own Scalar Network Analyzer and it’s a beauty! [Steve]’s SNA has a digital pinout matching a Raspberry Pi, but any GPIO could be used to operate the device and retrieve the data from the ADC. The design is based around a few tried and true chips …read more (https://hackaday.com/2019/12/25/diy-scalar-network-analyzer/)
Circuit Sculpture Teaches Binary, Plays PONG
https://hackaday.com/2019/12/25/circuit-sculpture-teaches-binary-plays-pong/

We sure wish we’d had a teacher like [Volos Projects]. He built this beautiful circuit sculpture to teach his students how to count in binary and convert it to decimal and hexadecimal. If you don’t already know binary, you get to learn it on DIP switches and a dead-bugged ATMega328 …read more (https://hackaday.com/2019/12/25/circuit-sculpture-teaches-binary-plays-pong/)
Adding USB-C To The TS100, But Not How You Think
https://hackaday.com/2019/12/26/adding-usb-c-to-the-ts100-but-not-how-you-think/

USB-C has its special Power Delivery standard, and is capable of delivering plenty of juice to attached hardware. This has led many to modify their TS-100 soldering irons to accept the connector. [Jan Henrik] is the latest, though he’s taken rather a different tack than you might expect.
[Jan] didn’t …read more (https://hackaday.com/2019/12/26/adding-usb-c-to-the-ts100-but-not-how-you-think/)
Custom Control Panels with Photogrammetry
https://hackaday.com/2019/12/26/custom-control-panels-with-photogrammetry/

One of the best applications for desktop 3D printing is the creation of one-off bespoke components. Most of the time a halfway decent pair of calipers and some patience is all it takes to model up whatever part you’re after, but occasionally things get complex enough that you might need …read more (https://hackaday.com/2019/12/26/custom-control-panels-with-photogrammetry/)
New Part Day: Sonoff USB Smart Adaptor Taps a New WiFi Chip
https://hackaday.com/2019/12/26/new-part-day-sonoff-usb-smart-adaptor-taps-a-new-wifi-chip/

For decades, we dreamt of a future where all of our electronics used a standardized power connector. Most of us probably didn’t expect that USB would ultimately fill that role, but we’ll take what we can get if it means a future without getting a new wall wart for every …read more (https://hackaday.com/2019/12/26/new-part-day-sonoff-usb-smart-adaptor-taps-a-new-wifi-chip/)
Open-Source Analytical Balance Pits Gravity Against Electromagnetism
https://hackaday.com/2019/12/26/open-source-analytical-balance-pits-gravity-against-electromagnetism/

As the open-source movement has brought its influence to more and more fields, we’ve seen an astonishing variety of things once only available at significant expense become accessible to anyone with access to the tools required to create them. One such arena is that of scientific instrumentation, and though we …read more (https://hackaday.com/2019/12/26/open-source-analytical-balance-pits-gravity-against-electromagnetism/)
Ask Hackaday: Drone Swarms Replace Fireworks; Where are the Hackers?
https://hackaday.com/2019/12/26/ask-hackaday-drone-swarms-replace-fireworks-where-are-the-hackers/

Your mom always warned you that those fireworks could put an eye out. However, the hottest new thing in fireworks displays is not pyrotechnic at all. Instead, a swarm of coordinated drones take to the sky with different lighting effects. This makes some pretty amazing shows possible, granting full control …read more (https://hackaday.com/2019/12/26/ask-hackaday-drone-swarms-replace-fireworks-where-are-the-hackers/)
Handheld MQTT Remote for Home Automation
https://hackaday.com/2019/12/26/handheld-mqtt-remote-for-home-automation/

If you’re working on a home automation project, you’re probably knee-deep into MQTT by now. If not, you should be. The lightweight messaging protocol is an ideal choice for getting your “Things” on the Internet, and controlling them all can be done easily through a simple web interface or an …read more (https://hackaday.com/2019/12/26/handheld-mqtt-remote-for-home-automation/)
Compact 3D Printed Hovercraft Is Loungeroom Floor Fun
https://hackaday.com/2019/12/26/compact-3d-printed-hovercraft-is-loungeroom-floor-fun/

Hovercraft come in all shapes and sizes. and while they’ve largely disappeared as a major commercial transit option, they remain popular in the hearts and minds of makers everywhere. [RCLifeOn’s] latest project concerns a compact, indoor-sized hovercraft piloted via FPV, and it looks to be brilliant fun.
The build consists …read more (https://hackaday.com/2019/12/26/compact-3d-printed-hovercraft-is-loungeroom-floor-fun/)
Folding An Off-The-Shelf 3D Printer
https://hackaday.com/2019/12/26/folding-an-off-the-shelf-3d-printer/

Most 3D printers don’t take up a lot of space, but they can be pretty bulky and awkward to travel with. [Jón Schone] needed a compact folding 3D printer for a secret project on his YouTube channel ProperPrinting, so he decided to modify a Creality Ender 3 Pro to achieve …read more (https://hackaday.com/2019/12/26/folding-an-off-the-shelf-3d-printer/)
3D Printing Paper — Sort Of
https://hackaday.com/2019/12/26/3d-printing-paper-sort-of/

There are only a few truly ancient engineered materials, and among the oldest is paper. Traditionally, paper is flat and can be bent into shapes. However, paper can be molded into for example packing material or egg cartons. [XYZAidan]  has a process that can recycle paper into 3D cardboard-like objects. …read more (https://hackaday.com/2019/12/26/3d-printing-paper-sort-of/)
Word Clock Does The Job With Laser-Etched Acrylic
https://hackaday.com/2019/12/26/word-clock-does-the-job-with-laser-etched-acrylic/

As far as telling the time, word clocks go out of their way to spell it out for you. As long as you know the language, they’re a stylish and effective way to get the message across. [Simon] built an elegant, stripped-back word clock of his own, with a laser …read more (https://hackaday.com/2019/12/26/word-clock-does-the-job-with-laser-etched-acrylic/)
Think You Know cURL? Care to Prove It?
https://hackaday.com/2019/12/27/think-you-know-curl-care-to-prove-it/

Do you happen to remember a browser-based game “You Can’t JavaScript Under Pressure”? It presented coding tasks of ever-increasing difficulty and challenged the player to complete them as quickly as possible. Inspired by that game, [Ben Cox] re-implemented it as You Can’t cURL Under Pressure!
In it, the user is …read more (https://hackaday.com/2019/12/27/think-you-know-curl-care-to-prove-it/)
Apple HomeKit Accessory Development Kit Gets More Accessible
https://hackaday.com/2019/12/27/apple-homekit-accessory-development-kit-gets-more-accessible/

Every tech monopoly has their own proprietary smart home standard; how better to lock in your customers than to literally build a particular solution into their homes? Among the these players Apple is traditionally regarded as the most secretive, a title it has earned with decades of closed standards and …read more (https://hackaday.com/2019/12/27/apple-homekit-accessory-development-kit-gets-more-accessible/)
Russia’s Newest Weather Satellite May Have Be Killed by Space Junk
https://hackaday.com/2019/12/27/russias-newest-weather-satellite-may-have-be-killed-by-space-junk/

For humans and satellites alike, making a living is space is hard. First, there’s the problem of surviving the brief but energetic and failure-prone ride there, after which you get to alternately roast and freeze as you zip around the planet at 20 times the speed of sound. The latter …read more (https://hackaday.com/2019/12/27/russias-newest-weather-satellite-may-have-be-killed-by-space-junk/)
3D Printed Pulsejet Uses Tesla Valve
https://hackaday.com/2019/12/27/3d-printed-pulsejet-uses-tesla-valve/

For most people, a jet is a jet. But there are several different kinds of jet engines, depending on how they operate. You frequently hear about ramjets, scramjets, and even turbojets. But there is another kind — a very old kind — called a pulsejet. [Integza] shows how he made …read more (https://hackaday.com/2019/12/27/3d-printed-pulsejet-uses-tesla-valve/)