#charlieplexing — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #charlieplexing, aggregated by home.social.
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Building An Energy-Harvesting Business Card
https://fed.brid.gy/r/https://hackaday.com/2026/08/31/building-an-energy-harvesting-business-card/
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Building An Energy-Harvesting Business Card
https://fed.brid.gy/r/https://hackaday.com/2026/08/31/building-an-energy-harvesting-business-card/
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Building An Energy-Harvesting Business Card
https://fed.brid.gy/r/https://hackaday.com/2026/08/31/building-an-energy-harvesting-business-card/
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A binary clock only needs 9 leds. With multiplexing, that's just 6 leads. With #Charlieplexing... five?
So, either an ATTiny with some kind of decoder chip, or a slightly larger ATmega chip?
Oh, maybe this!!! https://www.adafruit.com/product/3677
That could even drive the LEDs individually, no multiplexing!I wish I was better at #soldering. It low-key terrifies me. 😆
I could maybe bodge a design for a surface-mount LED board and send it to pcbway and have them a$$emble it?!? 🤷♂️
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A binary clock only needs 9 leds. With multiplexing, that's just 6 leads. With #Charlieplexing... five?
So, either an ATTiny with some kind of decoder chip, or a slightly larger ATmega chip?
Oh, maybe this!!! https://www.adafruit.com/product/3677
That could even drive the LEDs individually, no multiplexing!I wish I was better at #soldering. It low-key terrifies me. 😆
I could maybe bodge a design for a surface-mount LED board and send it to pcbway and have them a$$emble it?!? 🤷♂️
-
A binary clock only needs 9 leds. With multiplexing, that's just 6 leads. With #Charlieplexing... five?
So, either an ATTiny with some kind of decoder chip, or a slightly larger ATmega chip?
Oh, maybe this!!! https://www.adafruit.com/product/3677
That could even drive the LEDs individually, no multiplexing!I wish I was better at #soldering. It low-key terrifies me. 😆
I could maybe bodge a design for a surface-mount LED board and send it to pcbway and have them a$$emble it?!? 🤷♂️
-
A binary clock only needs 9 leds. With multiplexing, that's just 6 leads. With #Charlieplexing... five?
So, either an ATTiny with some kind of decoder chip, or a slightly larger ATmega chip?
Oh, maybe this!!! https://www.adafruit.com/product/3677
That could even drive the LEDs individually, no multiplexing!I wish I was better at #soldering. It low-key terrifies me. 😆
I could maybe bodge a design for a surface-mount LED board and send it to pcbway and have them a$$emble it?!? 🤷♂️
-
A binary clock only needs 9 leds. With multiplexing, that's just 6 leads. With #Charlieplexing... five?
So, either an ATTiny with some kind of decoder chip, or a slightly larger ATmega chip?
Oh, maybe this!!! https://www.adafruit.com/product/3677
That could even drive the LEDs individually, no multiplexing!I wish I was better at #soldering. It low-key terrifies me. 😆
I could maybe bodge a design for a surface-mount LED board and send it to pcbway and have them a$$emble it?!? 🤷♂️
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Как я сделал брелок на ATtiny13, научил его трем гипнотическим режимам и превратил в набор для пайки
Представьте: маленький брелок лежит в кармане. На нём — мордочка кота из популярного мема. Нажимаешь кнопку на затылке — и в центре головы загорается круг из двенадцати ярких SMD-светодиодов. Два огонька начинают бегать по кругу с коротким хвостом. Ещё одно нажатие — и запускается спиннер: три луча вращаются по часовой, потом три круга против. Третий режим — маятник, три светодиода плавно качаются взад-вперёд, как загипнотизированный взгляд. Четвёртое нажатие — и всё гаснет. Батарейка CR2032 отдыхает. Всё это работает на самом дешёвом микроконтроллере ATtiny13. Четыре пина управляют двенадцатью светодиодами через Charlieplexing. Никаких Arduino, никаких сдвиговых регистров.
https://habr.com/ru/articles/1044438/
#ATtiny13 #Charlieplexing #DIY #набор_для_пайки #SMD #светодиоды #брелок #встраиваемые_системы
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Как я сделал брелок на ATtiny13, научил его трем гипнотическим режимам и превратил в набор для пайки
Представьте: маленький брелок лежит в кармане. На нём — мордочка кота из популярного мема. Нажимаешь кнопку на затылке — и в центре головы загорается круг из двенадцати ярких SMD-светодиодов. Два огонька начинают бегать по кругу с коротким хвостом. Ещё одно нажатие — и запускается спиннер: три луча вращаются по часовой, потом три круга против. Третий режим — маятник, три светодиода плавно качаются взад-вперёд, как загипнотизированный взгляд. Четвёртое нажатие — и всё гаснет. Батарейка CR2032 отдыхает. Всё это работает на самом дешёвом микроконтроллере ATtiny13. Четыре пина управляют двенадцатью светодиодами через Charlieplexing. Никаких Arduino, никаких сдвиговых регистров.
https://habr.com/ru/articles/1044438/
#ATtiny13 #Charlieplexing #DIY #набор_для_пайки #SMD #светодиоды #брелок #встраиваемые_системы
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Как я сделал брелок на ATtiny13, научил его трем гипнотическим режимам и превратил в набор для пайки
Представьте: маленький брелок лежит в кармане. На нём — мордочка кота из популярного мема. Нажимаешь кнопку на затылке — и в центре головы загорается круг из двенадцати ярких SMD-светодиодов. Два огонька начинают бегать по кругу с коротким хвостом. Ещё одно нажатие — и запускается спиннер: три луча вращаются по часовой, потом три круга против. Третий режим — маятник, три светодиода плавно качаются взад-вперёд, как загипнотизированный взгляд. Четвёртое нажатие — и всё гаснет. Батарейка CR2032 отдыхает. Всё это работает на самом дешёвом микроконтроллере ATtiny13. Четыре пина управляют двенадцатью светодиодами через Charlieplexing. Никаких Arduino, никаких сдвиговых регистров.
https://habr.com/ru/articles/1044438/
#ATtiny13 #Charlieplexing #DIY #набор_для_пайки #SMD #светодиоды #брелок #встраиваемые_системы
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And now a followup on how to actually update a row of LEDs efficiently, using bitplanes:
https://aykevl.nl/2026/01/bitplanes/ -
And now a followup on how to actually update a row of LEDs efficiently, using bitplanes:
https://aykevl.nl/2026/01/bitplanes/ -
And now a followup on how to actually update a row of LEDs efficiently, using bitplanes:
https://aykevl.nl/2026/01/bitplanes/ -
And now a followup on how to actually update a row of LEDs efficiently, using bitplanes:
https://aykevl.nl/2026/01/bitplanes/ -
And now a followup on how to actually update a row of LEDs efficiently, using bitplanes:
https://aykevl.nl/2026/01/bitplanes/ -
Charlieplexing LEDs is actually really neat, if you understand how it works. It's basically just a LED matrix where you use the same pins on both sides of the matrix. I've written about it in my latest blog post:
https://aykevl.nl/2026/01/charlieplexing/Charlieplexing is what allows my 36-LED earrings to have so many LEDs - I would have needed a bigger microcontroller without Charlieplexing.
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Charlieplexing LEDs is actually really neat, if you understand how it works. It's basically just a LED matrix where you use the same pins on both sides of the matrix. I've written about it in my latest blog post:
https://aykevl.nl/2026/01/charlieplexing/Charlieplexing is what allows my 36-LED earrings to have so many LEDs - I would have needed a bigger microcontroller without Charlieplexing.
-
Charlieplexing LEDs is actually really neat, if you understand how it works. It's basically just a LED matrix where you use the same pins on both sides of the matrix. I've written about it in my latest blog post:
https://aykevl.nl/2026/01/charlieplexing/Charlieplexing is what allows my 36-LED earrings to have so many LEDs - I would have needed a bigger microcontroller without Charlieplexing.
-
Charlieplexing LEDs is actually really neat, if you understand how it works. It's basically just a LED matrix where you use the same pins on both sides of the matrix. I've written about it in my latest blog post:
https://aykevl.nl/2026/01/charlieplexing/Charlieplexing is what allows my 36-LED earrings to have so many LEDs - I would have needed a bigger microcontroller without Charlieplexing.
-
Charlieplexing LEDs is actually really neat, if you understand how it works. It's basically just a LED matrix where you use the same pins on both sides of the matrix. I've written about it in my latest blog post:
https://aykevl.nl/2026/01/charlieplexing/Charlieplexing is what allows my 36-LED earrings to have so many LEDs - I would have needed a bigger microcontroller without Charlieplexing.
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Track Your Circuits: A Locomotive PCB Badge https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #PCBHacks #ATmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #PCBHacks #ATmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #PCBHacks #ATmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #PCBHacks #ATmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge - This fun PCB from [Nick Brown] features a miniature railroad implemented with 0805... - https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #pcbhacks #atmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge - This fun PCB from [Nick Brown] features a miniature railroad implemented with 0805... - https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #pcbhacks #atmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge - This fun PCB from [Nick Brown] features a miniature railroad implemented with 0805... - https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #pcbhacks #atmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge - This fun PCB from [Nick Brown] features a miniature railroad implemented with 0805... - https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #pcbhacks #atmega32 #badge #train #pcb
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Track Your Circuits: A Locomotive PCB Badge - This fun PCB from [Nick Brown] features a miniature railroad implemented with 0805... - https://hackaday.com/2025/04/18/track-your-circuits-a-locomotive-pcb-badge/ #charlieplexing #pcbhacks #atmega32 #badge #train #pcb
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Fluid Simulation Pendant Teaches Lessons in Miniaturization https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #MiscHacks #LEDHacks #mcp73832 #ADXL362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #MiscHacks #LEDHacks #mcp73832 #ADXL362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #MiscHacks #LEDHacks #mcp73832 #ADXL362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization - Some projects seem to take on a life of their own. You get an idea, design and pro... - https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #mischacks #ledhacks #mcp73832 #adxl362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization - Some projects seem to take on a life of their own. You get an idea, design and pro... - https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #mischacks #ledhacks #mcp73832 #adxl362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization - Some projects seem to take on a life of their own. You get an idea, design and pro... - https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #mischacks #ledhacks #mcp73832 #adxl362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization - Some projects seem to take on a life of their own. You get an idea, design and pro... - https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #mischacks #ledhacks #mcp73832 #adxl362 #jewelry #stm32 #led
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Fluid Simulation Pendant Teaches Lessons in Miniaturization - Some projects seem to take on a life of their own. You get an idea, design and pro... - https://hackaday.com/2025/01/13/fluid-simulation-pendant-teaches-lessons-in-miniaturization/ #charlieplexing #fluiddynamics #metalworking #simulation #mischacks #ledhacks #mcp73832 #adxl362 #jewelry #stm32 #led
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Baffle the Normies with This Binary Thermometer https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #Digispark #LEDHacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #Digispark #LEDHacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #Digispark #LEDHacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #Digispark #LEDHacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer - We think it’s OK to admit that when someone puts a binary display on a project, it... - https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #digispark #ledhacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer - We think it’s OK to admit that when someone puts a binary display on a project, it... - https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #digispark #ledhacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer - We think it’s OK to admit that when someone puts a binary display on a project, it... - https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #digispark #ledhacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer - We think it’s OK to admit that when someone puts a binary display on a project, it... - https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #digispark #ledhacks #attiny85 #binary #dht11
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Baffle the Normies with This Binary Thermometer - We think it’s OK to admit that when someone puts a binary display on a project, it... - https://hackaday.com/2024/06/08/baffle-the-normies-with-this-binary-thermometer/ #charlieplexing #classichacks #thermometer #digispark #ledhacks #attiny85 #binary #dht11
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Trying to charlieplex a 10 segment bargraph with 4 different colours (and hence 4 different resistances) off 4 pins. Without using 10 resistors because I don't have that much space on this little board. Which I can almost do trivially except one of the colours is 4 bars so can't get them all through one resistor but have to share with one of the other colours...
Time to get the random number generating computer program out.
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Trying to charlieplex a 10 segment bargraph with 4 different colours (and hence 4 different resistances) off 4 pins. Without using 10 resistors because I don't have that much space on this little board. Which I can almost do trivially except one of the colours is 4 bars so can't get them all through one resistor but have to share with one of the other colours...
Time to get the random number generating computer program out.
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Trying to charlieplex a 10 segment bargraph with 4 different colours (and hence 4 different resistances) off 4 pins. Without using 10 resistors because I don't have that much space on this little board. Which I can almost do trivially except one of the colours is 4 bars so can't get them all through one resistor but have to share with one of the other colours...
Time to get the random number generating computer program out.
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Trying to charlieplex a 10 segment bargraph with 4 different colours (and hence 4 different resistances) off 4 pins. Without using 10 resistors because I don't have that much space on this little board. Which I can almost do trivially except one of the colours is 4 bars so can't get them all through one resistor but have to share with one of the other colours...
Time to get the random number generating computer program out.
-
Trying to charlieplex a 10 segment bargraph with 4 different colours (and hence 4 different resistances) off 4 pins. Without using 10 resistors because I don't have that much space on this little board. Which I can almost do trivially except one of the colours is 4 bars so can't get them all through one resistor but have to share with one of the other colours...
Time to get the random number generating computer program out.
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Zu viele LED anzusteuern und zu wenige Ausgänge am Controller übrig?
#Charlieplexing kann eine Lösung sein
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Zu viele LED anzusteuern und zu wenige Ausgänge am Controller übrig?
#Charlieplexing kann eine Lösung sein
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Zu viele LED anzusteuern und zu wenige Ausgänge am Controller übrig?
#Charlieplexing kann eine Lösung sein
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2 days of learning charlieplexing and PIO on the rp2040 only for it to just not work and have no real indication as to why. Best guess is that maybe the LEDs aren’t all the same. I guess tomorrow I’m playing around with that PIO emulator - and therefore once again installing the JDK 😫
Also I suspect that my PIO program isn’t very good. No idea what would improve it though! #rp2040 #pico #charlieplexing #LEDs #pio
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2 days of learning charlieplexing and PIO on the rp2040 only for it to just not work and have no real indication as to why. Best guess is that maybe the LEDs aren’t all the same. I guess tomorrow I’m playing around with that PIO emulator - and therefore once again installing the JDK 😫
Also I suspect that my PIO program isn’t very good. No idea what would improve it though! #rp2040 #pico #charlieplexing #LEDs #pio
-
2 days of learning charlieplexing and PIO on the rp2040 only for it to just not work and have no real indication as to why. Best guess is that maybe the LEDs aren’t all the same. I guess tomorrow I’m playing around with that PIO emulator - and therefore once again installing the JDK 😫
Also I suspect that my PIO program isn’t very good. No idea what would improve it though! #rp2040 #pico #charlieplexing #LEDs #pio
-
2 days of learning charlieplexing and PIO on the rp2040 only for it to just not work and have no real indication as to why. Best guess is that maybe the LEDs aren’t all the same. I guess tomorrow I’m playing around with that PIO emulator - and therefore once again installing the JDK 😫
Also I suspect that my PIO program isn’t very good. No idea what would improve it though! #rp2040 #pico #charlieplexing #LEDs #pio
-
2 days of learning charlieplexing and PIO on the rp2040 only for it to just not work and have no real indication as to why. Best guess is that maybe the LEDs aren’t all the same. I guess tomorrow I’m playing around with that PIO emulator - and therefore once again installing the JDK 😫
Also I suspect that my PIO program isn’t very good. No idea what would improve it though! #rp2040 #pico #charlieplexing #LEDs #pio