PlanetArduino

Time 2020-12-11 17:03:50

Web Name: PlanetArduino

WebSite: http://www.planetarduino.org

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We were struck by how attractive [mircemk s] Arduino-based frequency counter looks. It also is a reasonably simple build. It can count up to 6.5 MHz which isn t that much, but there s a lot you can do even with that limitation.The LED display is decidedly retro. Inside a very modern Arduino Nano does most of the work. There is a simple shaping circuit to improve the response to irregular-shaped input waveforms. We d have probably used a single op-amp as a zero-crossing detector. Admittedly, that s a bit more complex, but not much more and it should give better results.There was a time when a display like this would have meant some time wiring, but with cheap Max 7219 board available, it is easy to add a display like this to nearly anything. An SPI interface takes a few wires and all the hard work and wiring is done on the module.The code is short and sweet. There are fewer than 30 lines of code thanks to LED drivers and a frequency counter component borrowed from GitHub.If you add a bit more hardware, 100 MHz is an easy target. There are at least three methods commonly used to measure frequency. Each has its pros and cons.Christmas trees normally have a star on top, and Super Mario famously becomes invincible when he grabs the star power-up. Naturally, for retro game enthusiasts, these two are begging to be united. In this project, Doug Lenz (AKA “Freshanator”) did just that by morphing the Mario star into something that can be placed atop a tree, using a 3D-printed body and addressable WS2812B LEDs to provide the “twinkles.”The unit is printed in yellow PLA, with a pair of black eyes glued on. Inside, LEDs are arranged near the tip of each of the star’s five points, which diffuse through the printed material. Power is supplied by a Micro USB breakout, and the lighting is controlled via an Arduino Nano. The device runs on the “Fire2012” example program from the FastLED library, though Lenz may revisit its operation in the future.If you need to strip a wire or two, that s easy enough. However, what if you need tens or hundreds of wires stripped to the exact same length? Such a task would quickly become tedious, but with Mr Innovative s Arduino Nano-based machine all you have to do it pop in a few numbers and it takes care of the rest!The automated device uses a 3D printer-like stepper mechanism to feed wire though a flexible length of tubing, which comes out on the other side positioned under a wire stripper. A servo is employed to aim the tubing and wire at either the cutting or stripping portion of the tool, which clamps down via a stepper and linkage setup. User interface consists of a 2.8 touchscreen, allowing one to define the wire and stripped lengths, as well as how many individual wires are required. Wouldn t it be nice if beer pong could somehow get easier the more you drink? You know, so you can drink more? [Ty Palowski] has made it so with automated, mind-controlled beer pong.[Ty] started by making a beer pong table that moves the cups back and forth at both ends. An Arduino Nano controls a stepper that controls a slider, and the cups move with the slider through the magic of magnets. The mind control part came cheaper than you might think. Back in 2009, Mattel released a game called Mind Flex that involves an EEG headset and using brain waves to guide a foam ball on a stream of air through a little obstacle course. These headsets are available for about $12 on ebay, or at least they were before this post went up.[Ty] cracked open the headset added an HC-06 Bluetooth module to talk to the Arduino. It s using a program called Brainwave OSC to get the raw data from the headset and break it into levels of concentration and relaxation. The Arduino program monitors the attention levels, and when a certain threshold of focus is reached, it moves the cups back and forth at a predetermined speed ranging from 1 to an impossible-looking 10. Check out the two videos after the break. The first one covers the making of the the automatic beer pong part, and the second is where [Ty] adds mind control.We ve seen a different headset the hacker-friendly NeuroSky Mindwave pop up a few times. Here s one that s been hacked to induce lucid dreaming.Via r/duino Wouldn t it be nice if beer pong could somehow get easier the more you drink? You know, so you can drink more? [Ty Palowski] has made it so with automated, mind-controlled beer pong.[Ty] started by making a beer pong table that moves the cups back and forth at both ends. An Arduino Nano controls a stepper that controls a slider, and the cups move with the slider through the magic of magnets. The mind control part came cheaper than you might think. Back in 2009, Mattel released a game called Mind Flex that involves an EEG headset and using brain waves to guide a foam ball on a stream of air through a little obstacle course. These headsets are available for about $12 on ebay, or at least they were before this post went up.[Ty] cracked open the headset added an HC-06 Bluetooth module to talk to the Arduino. It s using a program called Brainwave OSC to get the raw data from the headset and break it into levels of concentration and relaxation. The Arduino program monitors the attention levels, and when a certain threshold of focus is reached, it moves the cups back and forth at a predetermined speed ranging from 1 to an impossible-looking 10. Check out the two videos after the break. The first one covers the making of the the automatic beer pong part, and the second is where [Ty] adds mind control.We ve seen a different headset the hacker-friendly NeuroSky Mindwave pop up a few times. Here s one that s been hacked to induce lucid dreaming.Via r/duinoSide glow fiber optics – unlike their cousins that efficiently transmit light from one point to another – emit a glow along the length of each strand when light is applied. This creates a beautiful effect, which Andrei Erdei implemented nicely in his wall decoration project.Erdei’s build consists of a series of nine square frames, inside of which 3mm fiber optic strands are connected, looping gracefully from one edge to another. Each strand is lit by an addressable WS2812B LED module, under the control of an Arduino Nano. You can see this wall installation in action in the video below, and more info on how to build your own is available on the project write-up.Yuval Tsur made this excellent game box comprised of four oversized LED-lit arcade buttons, as a gift to his son to celebrate the arrival of his little brother. The box features both Simon and a reaction game where you must quickly press the button that lights up. In addition to gaming, the device can play the Super Mario Brothers theme, or react with light and sound to button presses in free play (or “baby brother”) mode.Controlled by an Arduino Nano, the rest of electronics include an LCD display interface and a pair of 5W, 4? speakers. The project is constructed out of acrylic top and bottom faces — fastened together using long standoffs for extra strength — and MDF sidewalls decorated with printed paper. More details on the music and game box can be found in Tsur s write-up. From the looks of the video below, his son loved it! When we first saw [Barqunics ] design for a self-stabilizing spoon for people suffering from Parkinson s disease, we wondered how well something like that could work. But take a look at the video below and you ll see this does a fine job of responding to the user s hand movements and keeping the spoon perfectly level through a wide range of motion.There s at least one commercial product that attempts to stabilize a spoon in the same way so that people suffering from that affliction can retain a measure of independence. This shows that you don t need injection molding and factory made boards to prove the concept. An MPU6050 provides sensor information and two servo motors control the spoon using PID control.PID short for proportional, integral, derivative is a way to adjust something to a desired point. For example, consider trying to heat a cup of water to 95 °C. If you simply turn the heater on full blast until you get to 95 °C, the water will actually get hotter because you ll overshoot. Using PID, the amount of heating provided will depend on how far off you are now (proportional), how far off you ve been over the long term (integral), and how much change you ve effected recently (derivative). The same algorithm works for spoon-balancing and many other types of controls.This isn t the first bootstrapped assistive spoon project we ve seen. We even looked at the commercial version, awhile back. For some reason, when slot machines went digital, they lost their best feature the handle. Who wants to push a button on a slot machine, anyway? Might as well just play video poker. [John Bradnam] seems to agree, and has built an open-source three-color matrix slot machine complete with handle.In this case, you ll be losing all of your nickels to an Arduino Pro Mini. The handle is an upgrade to an earlier slot machine project that uses three 8 8 matrices and a custom driver board. When the spring-loaded handle is pulled, it strikes a micro switch to spins the reels and then snaps back into place. Between each pull, the current score is displayed across the matrix. There s even a piezo buzzer for victory squawks. We only wish the button under the handle were of the clickier variety, just for the feels. Check out the short demo video after the break.If you re not a gambler, you could always turn your slot machine into a clock.The Nano is one of our smallest boards, and as YouTuber Craft Channel has proven, it s tiny enough to act as the brains of a wristwatch. This DIY wearable device features a nicely made wooden enclosure, with power supplied by a 1S 300mAh LiPo battery, and the face itself shown on a 1.3 ST7789 display.Its lack of a real-time clock unit, along with a fairly limited battery, means that the watch will only work for a short time before needing attention. However, creator Craft Channel notes that the build is an experimental project, and it’s a great demo of what can be done with a short bill of materials and a bit of ingenuity! About Planet Arduino is, or at the moment is wishing to become, an aggregation of public weblogs from around the world written by people who develop, play, think on Arduino platform and his son. The opinions expressed in those weblogs and hence this aggregation are those of the original authors. Entries on this page are owned by their authors. We do not edit, endorse or vouch for the contents of individual posts. For more information about Arduino please visit www.arduino.cc NewsletterSign up for the PlanetArduino Newsletter, which delivers the most popular articles via e-mail to your inbox every week. Just fill in the information below and submit.

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