CharliePlex by Tim Pelling

Posted by Mohammed 15/10/2016 0 Comment(s) Clients projects,

 Tim Pelling was kind enough to provide us with the information on this post. Thank you Tim ^^

 

 

charlieplex-tutorial

  1.       What am I trying to do:

An 'experimental' 4 pin, 3x4, 12 led addressable charlieplex display using POV to display alphabetic characters, controlled by another ATTiny85.  It's showing the number 4 in the picture, whilst it can display the whole alphabet given the poor resolution it's pretty difficult to read.

 

2. Technical description:

Components

Notes (if any)

ATTiny85

 

LEDs, Cardboard, Patience

 

 

 

 

Next step:

 

To do list:

Notes

Change the loop code to maximize LED brightness.

Interesting interactions between brightness and speed occur depending on how many LEDs each character requires lit … with my current code.

Frame-buffer for scrolling led messages from serial input (have working fixed message scrolling code, but want variable messages)

 

build a 5 pin (4x5=20led) display on perfboard with mounted input button and ATTiny i.e. use all the ATTiny's available pins for use as a self-contained scrolling LED message board, using morse code via the single button as message input

 

Fail! Bought two types of perfboard from ZeroOhm to try them out, didn’t work!

Now to go back and purchase some ‘standard’ perfboard and try again.

Anyway – Fail it might be, but everything you do wrong teaches you something.

 

If you have any questions, feel free to leave a comment below.

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