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  • Author Author: Workshopshed
  • Date Created: 12 Oct 2018 2:50 PM Date Created
  • Views 1720 views
  • Likes 10 likes
  • Comments 6 comments
  • clusteredmcuch
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Tiny light cluster

Workshopshed
Workshopshed
12 Oct 2018

Here's my idea I'm afraid I did not quite have time to get it completed as I've had lots of other things on.

 

My first thought was what is the cheapest MCU I can find? I spotted the ATTiny10 chips for just 25p each so bought a handful of these along with some surface mount LEDs and resistors.

These would be powered from some button batteries I just happened to have lots of.

The nodes would be spaced out on a clear plastic sheet so you could see that there was no physical connection between them.

They would provide a synchronised pattern or message.

image

So how does the synchronisation work you ask? Well that would be done by using a camera flash and the LEDs acting as a sensor (a trick I learnt from the Microbit).

 

https://electronics.stackexchange.com/questions/902/detecting-light-with-an-led

 

Unfortunately I only got as far as wiring up the ATTiny to some wires and the LED to some wires. I do have a programmer for the ATTiny but I've not tried programming it yet.

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Top Comments

  • 14rhb
    14rhb over 6 years ago +6
    Andy, Maybe you haven't got as far as you'd have liked but thank you for sharing as you've given me some ideas for in the future. Your use of a small MCU was exactly along the lines of what I was thinking…
  • Fred27
    Fred27 over 6 years ago +5
    25p? You were ripped off! 3c is the going rate for microcontrollers these days. https://www.eevblog.com/forum/blog/eevblog-1132-the-3-cent-microcontroller!/
  • genebren
    genebren over 6 years ago +4
    These ATTiny parts are on of my favorites. I have used these on a lot of simple device including my light ring for my microscope and my under cabinet LED lighting solution in my kitchen. I have also used…
  • Workshopshed
    Workshopshed over 5 years ago

    Just got some UV resin for another project. Perhaps I'll get this one back up and running?

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  • neilk
    neilk over 6 years ago

    Looks as if I will be getting some of these to play with - when I have time!!

     

    Neil

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  • genebren
    genebren over 6 years ago

    These ATTiny parts are on of my favorites.  I have used these on a lot of simple device including my light ring for my microscope and my under cabinet LED lighting solution in my kitchen.

     

    I have also used these and some similar PIC chips to eliminate a bunch of discretes and logic gates in H-bridge drivers, using timers to manage on-off times to prevent low impedance paths between power rails (off before on protection).

     

    Nice of you to share your ideas even if you did not complete your entry.

     

    Gene

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  • Workshopshed
    Workshopshed over 6 years ago in reply to Fred27

    OTP!

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  • 14rhb
    14rhb over 6 years ago

    Andy,

     

    Maybe you haven't got as far as you'd have liked but thank you for sharing as you've given me some ideas for in the future. Your use of a small MCU was exactly along the lines of what I was thinking when I proposed the Project14 'Clustered MCU'. At the time I also had a whole strip of 6pin simple PIC MCU and was thinking what circuit could I replicate 20 times, each powered by a coin cell and each would do something fun. Perhaps scattering them on a table and watching them move or flash, organise or communicate. I then found that my PIC were so limited in program memory and RAM most of what I wanted to do wasn't feasible (even if went back to using assembly language).

     

    However you have overcome one issue I had....the lack of pins. Pin multiplexing with the ICSP pins would require some jumpers but even then there was little left over to do anything interesting. However I hadn't though of ever using the output LED as an input sensor and your idea of a flash setting them off works well too - a great way of synchronising units to do something at the same time (or delay from that point accordingly).

     

    So well done, you've got much further than me image

     

    Rod

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