#charlieplexing

[gyarudenkyoko]

[hackernewsrobot]

Charlieplexing

https://en.wikipedia.org/wiki/Charlieplexing

[ourwitching]

The Charliewatch by [Trammell Hudson] is one of those projects which is beautiful in both design an...

[blitzcitydiy]

The PCB3 arrived today from @brian_lough 🎄 #diy #tech #electronics #hardware #pcb #circuit #charlieplexing #pcb3 #make #makersgonnamake #makersmovement #xmas #christmastree #techthehalls #nerdlife https://www.instagram.com/p/BrItVPSH6Ab/?utm_source=ig_tumblr_share&igshid=x3702eih5bne

[ghostgamersl]

ARDUINO CHARLIEPLEXED CUBE | ARDUINO PROJECT #shorts

[ensklncblr-blog]

Charliecube -- Charlieplexed 4x4x4 RGB LED Cube - Радио - https://arduino.eemuhendis.com/?p=4408

[planetarduino]

NeoPixel Matrix Simulation Lets You Virtually Groove to the Lights

You are stuck at home quarantined and you want to do some Arduino projects. The problem is you don’t have all the cool devices you want to use. Sure, you can order them, but the stores are slow shipping things that aren’t essential these days. If you want to get a headstart while you are waiting for the postman, check out Wokwi’s Playground. For example, you can write code to drive a virtual NeoPixel 16×16 matrix. There’s even example code to get you started.

There are quite a few other choices in the playground including Charlieplexed LEDs, a keypad, and an LCD. There are also challenges. For example, in the traffic light challenge, you are given code that uses a task scheduler library to implement a traffic light. You have to add a turn signal to the code.

In addition to LEDs in various configurations, the site has some serial bus components, an LCD, a keypad, and a NeoPixel strip. There are also a few tools including an EasyEDA to KiCad converter and a way to share sourcecode similar to Pastebin.

Of course, simulations only get you so far, but the site is a fun way to play with some different I/O devices. It would be very nice if you could compose for the different components together, but you could work your code in sections, if necessary. You can do similar things with TinkerCad circuits. If you want to install software, there’s a simulator for you, too.

NeoPixel Matrix Simulation Lets You Virtually Groove to the Lights was originally published on PlanetArduino

[vipipiblog-blog]

HONK HK-6020 USB Powered Drink Coffee Cup Warmer Plate - Black + Blue -----> $6.29 BOVIS 5102#01 Casual Man's PU Credit Name Card Wallet w/ Slots - Coffee -----> $10.69 BOVIS 5102#02 Casual Man's PU Credit Name Card Wallet / Slots - Coffee -----> $10.74 BOVIS 8019#1 Fashion Man's PU Credit Name Card Wallet w/ Slots + Buckle - Light Coffee -----> $12.64 BOVIS 8019#2 Casual Man's PU Credit Name Card Wallet w/ Slots + Buckle - Light Coffee -----> $12.62 Protective Retro Flag of United States Pattern Back Case for Iphone 5 - Yellow + Red + Coffee -----> $2.30 Car Cigarette Powered Travel Coffee Water Milk Baby Bottle Warmer Heater - Blue (12V) -----> $9.96 8 x 8 Dot-Matrix Red LED Display Board for Arduino (Works with Official Arduino Boards) -----> $2.89 DIY MAX7219 Red LED Dot Matrix Display Module for Arduino (Works with Official Arduino Boards) -----> $4.99 K1208040 LM393 Infrared Speed Sensor Module for Arduino (Works with Official Arduino Boards) -----> $6.50 LOL Shield Charlieplexed LED Red Light Matrix Kit for Arduino (Works with Official Arduino Boards) -----> $20.20 Fashion Protective Case Bag with Lanyard for Digital Camera - Red + Coffee -----> $2.99 DIY Red LED Illuminated Car Toggle On / Off Switch (12V / 20A) -----> $3.48 Keyes Red/Green Color LED Common Cathode Module 3MM for Arduino (Works with Official Arduino Boards) -----> $1.97 Keyes 38KHz IR Infrared Transmitter Module for Arduino (Works with Official Arduino Boards) -----> $2.16 GReddy Type-RS BOV Blow Off Valve - Grey + Blue -----> $42.69 DIY Red Light 5A ON / OFF Switch for Vehicle Car (24V) -----> $5.91 Silicone Square Scattered Wires Organizer - White + Coffee (Size-L/Pair) -----> $4.47 Halloween Costume Face Paint Make Up Crayons Set - Red + Blue + Green + Coffee -----> $2.99 Solar Powered Blue LED Smoke-free Ashtray for Home/Office/Cars -----> $10.99 USB Powered Coffee Warmer -----> $4.99 QWERTY Mini Ultra-thin K-1000 Wired Keyboard for PC MAC & Office -----> $12.56 White Red Wine Aerator Bottle Plug Shutoff Silicone Funnel Stopper Pour Pourer -----> $3.44 5V 2.5W 10 Red 4 Blue Portable USB LED Plant Grow Lamp for Home Office Garden Greenhouse -----> $4.70 Nuts N More High Protein Peanut Butter 10 Pack Toffee Crunch -----> $13.00 Nuts N More High Protein Peanut Butter 1 Pack Toffee Crunch -----> $3.89 Fusion Pro 1792g Banoffee Ice Cream -----> $48.13 Iso-Amino Coffee Creamer 30 Servings French Vanilla -----> $23.41 Green Coffee 90 Tablets -----> $11.70 Micro Whey 2lb - Banoffee -----> $39.03 RX Bar 12 Bars Coffee Chocolate -----> $29.27 Hydra Shred 60 Servings Cold Brewed Coffee -----> $48.13 Gold Standard 100% Whey 2lb - Caramel Toffee Fudge -----> $33.81 Coffee Creamers 355ml - French Vanilla -----> $5.19 Protein Porridge 100g Toffee -----> $3.89 Protein Porridge 8 x 100g Toffee -----> $0.00 Instant Whey Pro 5lb Banoffee -----> $58.55 Coffee Bean Almond Butter 368g -----> $14.30 Gold Standard 100% Whey 2.27kg Caramel Toffee Fudge -----> $65.04 Quest Protein Powder 907g Cold Brew Coffee Latte -----> $45.52 High Protein Iced Coffee 14 Servings -----> $37.73 Coffee Creamer 355ml - Original Cream -----> $5.19 Clif Bar 12 Bars Peanut Toffee Buzz -----> $26.00 Mocha Coffee Creamer -----> $0.00 Sweet Cream Coffee Creamer -----> $0.00 Coffee Creamers 355ml - Mocha -----> $5.19 Hazelnut Coffee Creamer -----> $0.00 French Vanilla Coffee Creamer -----> $0.00 Original Cream Coffee Creamer -----> $0.00 Coffee Creamer 355ml - Sweet Cream -----> $5.19

[zeppelinmaker]

Charlieplexing con Arduino - video 125 Come accendere molti led con pochi pin.

[ourwitching]

The Charliewatch by [Trammell Hudson] is one of those projects which is beautiful in both design an...

[wecappafc]

Raspberry Pi 3 Arduino, Charlieplex, GPS, RFID, GPS, Xbee lot

http://dlvr.it/QCC2zB

[ciara-maker-portfolio-blog]

Microcontroller Exploration

I am definitely intending to incorporate light into my project. I plan on using an 8x8 neopixel matrix from adafruit as my lights. I will test the light code on a rigid matrix that we already have, and for the final project I will either use the flexible one or charlieplex multiple color-changing LEDs, which I am in the process of looking up. This is the only electronic component that I am planning on using, but it will work well with the flora board and bluetooth connection to the app, which will make the changing of the lights really special. I will also be using stamps, fabric, thread, and a sewing machine for design and assembly of my quilt. If I am using the matrix, I do not think that I will need to multithread, but if I need to use LEDs, I may, but I will also be charlieplexing.

Charlieplexing is threading together multiple LEDs using a limited number of pins, and getting the LEDs to light up by alternating which pin is sending out electric signals and which one is ground. This will be useful if I cannot use a matrix in my project, as it will limit the number of pins that I am using on my board and make the LED chain more matrix-like.

Below is the link to the code that Becky Stern used for her bluetooth sweater: https://learn.adafruit.com/neopixel-matrix-snowflake-sweater?view=all

I am modifying this code by changing the pixels that will light up. I will be altering the portion of the code that creates the pattern of each snowflake, and changing it to make various holiday shapes, such as a christmas tree, snowflake, gift box, star, etc.

Below is the code for charlieplexing the arduino board: http://www.instructables.com/id/Charlieplexing-the-Arduino/

I can modify this code to work for my flora board, and also to include more pins and LEDs if I need to. This will help me customize the LEDs that are lighting up, if I am not able to use a matrix in my project.

[dtcommonplaceblogp4]

Commonplace Entry #17

          Wow. What a way to start off the weekend. Today was a train wreck starting from the morning in Computer Engineering, where a Breadboard Assignment and Programming kept me held up for the entire class when there’s a recently announced presentation a few minutes ago due on Monday. It’s a complex concept called “Charlieplexing” where when using a microcontroller such as an Arduino, for one pin on the microcontroller (There are 13 numbered Pins), you must assign 3 LEDs to light up from one pin, as usually you would assign 1 LED per pin. You must do this 3 times, therefore in accordance with a fancy formula to find the number of LEDs to use (n^2 - n), this means you would need to program for 9 LEDs. Out of anything, I’m crapping my pants for this. I have no clue how long it will take or how it even works to begin with. I simply just want to give up and accept the mark I get, because I am wasting time on something I have no comprehension of when there’s an assignment to complete for the same class on Monday. Debugging my program in a nutshell though is like the hydra from Greek mythology: Fix one bug, two more shall take its place.

           However, that wasn’t even the worst I’ve seen today. In the last period, which is English, after sitting through the final Panel Discussion involving the film The Dark Knight Rises, I was going to play a diagnosis Kahoot about the concept of “Logos” in English, which would have been a refresher of the lesson learned last year when it was first introduced. My teacher gave us VERY SPECIFIC INTRODUCTIONS to use our real names for this; I simply just needed to type in “Daniel”. It was a very easy instruction to follow. However, like how disjointed our class is given that the ratio of boys to girls is 19 to 10, a handful of boys didn’t take the instructions seriously and started inputting inappropriate nicknames like “Player Hoe”, which thus resulted in the Kahoot being shut down and everyone being forced to work on their Commonplace Blogs in complete silence for the final 20 minutes of the class. As the final nail in the coffin, it was announced that Kahoots would no longer run in this period because of this incident. In a few minutes before the game even started, we lost our only fun opportunity in this class for the next 3 months. I expected to play a proper Kahoot, seeing as last period which was Food and Nutrition, I was also playing Kahoot as part of a presentation, only for it to crash midway for everyone playing as thus forcing a restart of the game. When I attempted to log back in, Kahoot would lock up at the loading screen, effectively preventing me from joining the game at all. Now I will never get this opportunity in English class ever again, all because some dudes decided to dick around and ruin it for everyone. I will never be able to brush up my knowledge on what Logos means in Grade 12 English.

          This begs me the question to those who ruined it: What the hell is so hard about following instructions? Personally, I don’t blame the teacher for cancelling the game. If I was her, I would also advocate for a Kahoot where you use your real names as your nickname, as I find that it’s easier to identify who has more knowledge on the subject. With nicknames, it opens the door to inappropriate behavior which I am strongly against. One of these offenders who ruined the game, I actually dislike him immensely as he previously pushed me around in Grade 9, and thus looks down on me as inferior. In fact, earlier today he was ripped into by the teacher in front of the entire class for passing around a phone while the Panel Discussion was in session. Even more so, the teacher was right beside him when he did that, up to the point she had to stop the presentation and scorn him for doing such a thing. For real though? What made you think passing a goddamn phone to others during a presentation WHILE A TEACHER IS BESIDE YOU was going to end well? It wasn’t obviously, and thus I can clearly tell that he was an offender judging by his previous offenses. He clearly has shown that he can’t follow instructions: First from this incident, then with the Kahoot cancellation and even 3 weeks ago, when we were called up to check confirmation of our homework completion which was for Theory Notes on The Dark Knight Rises, he merely just took the information from the notes we learned in class and passed them off as his homework being done, yet on the rubric outline it specifically said to expand and research more about your chosen theory. *FACEPALMS INTENSIFY* Since he pushed me around before, I think it’s only fitting that I poke at his weaknesses the same way as his comeuppance. I figure it’s time for him to be put in his place, as only intelligence is accepted here, not by the many girls that you run after with your playboy behavior. What could’ve been a rewarding activity from having to sit through 6 Panel Discussions straight, now my teacher has to accommodate for the lowest common denominator of immaturity, starting with your actions among others.

          And as for the rest of the offenders including him, I would also ask them: “Were you trying to be a party pooper, were you born stupid, or are you both?” Personally, I’m vouching for both, seeing as they don’t know when to shut up or act civilized. Needless to say, I’m baffled that our Grade has come to this point. I believe that last year’s graduates were perhaps the last graduates to act civilized and exit high school with a sense of class. For our Grade to act this way though, GRADE 12 ESPECIALLY of any grade, is rather insulting and down right immature. If any of the previous graduates came back to visit, I’m pretty sure they would be disgusted by how incompetent, substandard, and unprofessional we’ve become.

[mickmake]

Multiplexing: Doing more with less. // Technology

Multiplexing: Doing more with less. // Technology

Multiplexing was first used in the 1870s, but what is it and how is it used? What are the various types of multiplexing? What about keyboard matrices and Charlieplexing? (more…)

[beachcomberbob]

The main switch will power up the electronics for the gauge lights, low battery circuit, and the ‘slow glow’ valve lights. It also supplies power to the circuit for the ‘charlieplex’ light sequencer in the main tube, but to activate this, I wanted a proper trigger. Again, touch sensors were tried, but were unreliable, so I came up with a solution using a micro push button. I ground out a pocket deep enough for half the width of the switch, which will centre the switch in the frame, with the other half fitting into a recess in the rubber trigger grip.

[ds4design]

World’s Smallest LED Cube – Again

There’s a new challenger on the block for the title of the “Worlds Smallest 4x4x4 RGB LED Cube“. At 13x13x36 mm, [nqtronix]’s Cube Pendant is significantly smaller than [HariFun’s] version, which measures in at about 17x17x17 mm just for the cube, plus the external electronics. It took about a year for [nqtronix] to claim this spot, and from reading the comments section, it seems [HariFun] isn’t complaining. The Cube Pendant is small enough to be used as a key fob, and [nqtronix] has managed to really cram a lot of electronics in it.

The LED’s used are 0606 RGB’s which are 1.6mm square, although he did consider using 0404’s before scrubbing the idea. There’s many ways of driving 192 IO’s, but in this case, Charlieplexing seemed like the best solution, requiring 16 IO’s. Unlike [HariFun]’s build, this one is fully integrated, with micro-controller, battery and everything else wrapped up in a case made entirely from PCB — inspired by [Voja Antonic]’s FR4 enclosure technique, and the LED array is embedded in clear resin.

Along the way, he’s had to resort to several hacks to bring it to fruition. For starters, he’s used the ATmega328BP [pdf], instead of the more usual ATmega328P, giving him extra IO’s to play with. And since Charlieplexing works better at higher voltages, he’s using a boost converter to provide +5.5V — the max. limit for the ATmega — to drive the cube. The LiPo charger has a slightly unusual P-MOSFET switching section to switch between USB input and LiPo without causing too much of a voltage drop. There’s a few parts to help detect low voltage, but his code doesn’t yet use this feature.  He’s also thrown in an accelerometer in to the mix to respond to taps, double taps and shakes, but this too is not yet implemented in code. Since he ran out of board space, the EEPROM is dead-bug soldered. And the push button is built from, well, pulling apart a regular push button and using its innards. He’s posted the DIPtrace board design files as well as the code on the Instructable, in case some one else wants to take a stab at replicating the cube. Although we must say that apart from being a soldering Ninja, you also need pretty good mechanical chops to build this tiny cube.