reDOT

Details

The TIL311 had a alphanumerical brother the TIL305. This was a 5x7 LED matrix in the same form factor. Similar to #PICTIL, which is replacement for TIL311 this can replace TIL305.

This is more a fun project, or side project of #PICTIL. There are still original TIL305 available. And also other pin compatible parts (like LTP-305). But only with red or green LEDs. Also the character size will be bigger with reDOT.

If you want to try building it and soldering some 0402 LEDs, you can get your own boards from OSH-Park: But order them on your own risk. The boards do not full fill OSH-Parks design rules. With 5mil traces and spaces they are a little bit smaller. But for me that is more a prove that they can handle also 5 mil, which fits much better in my normal grids.

Components

1 × PCB

36 × LED 0402 or 0201 (deoens on wich Verson) SMD LED any color

2 × pinheader or pins standard 100 mil pinheaders do NOT fit

1 × Time

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some test software for STM8S103F3
Alex • 12/20/2016 at 18:53 • 0 comments

I wrote some software some time ago to test reDOT. First I used Atmel's AVR for testing, but newer and showable Version of this test software are written for ST's STM8 (these 0.7 cents cheap Chinese boards). If you are interested: https://github.com/al-1/STM8_TIL305/
It is not doing much. Just count up though all ASCII chars. (and it is with 1095B already over 1kB). More features like brightness control or serial interface will be added.
sodering 0201 LEDs works!
Alex • 12/10/2016 at 15:56 • 3 comments

Maybe the smallest handmade LED Matrix...

This is not the board from the last log. It is a earlier 0201 board revision with a missing trace, fixed with a wire. More pictures soon.......
Try out 0201 LEDs
Alex • 12/09/2016 at 16:30 • 7 comments

There are 0201 SMD LEDs available. An I want to try them out. So I made a 0201 Version of reDOT to test these LEDs (and trying to solder these LEDs). With these tiny LEDs the grid of the LED-Matrix is 40 mil. This is smaller than in original TIL-305 (50mil)
I hope I will be able to solder that.
A video
Alex • 10/06/2016 at 18:53 • 0 comments

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First Tests
Alex • 10/06/2016 at 18:31 • 0 comments

The first unit is soldered with blue chaep China LEDs Here is a image of first Test (displaying a 'X'):

View all 5 project logs

Discussions

danjovic wrote 12/12/2016 at 00:09

That's an impressive home soldering job!

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Alex wrote 12/12/2016 at 17:54

Thanks!

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davedarko wrote 10/08/2016 at 17:00

I've ordered some :)

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Alex wrote 10/08/2016 at 17:12

nice!

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Alex wrote 10/08/2016 at 17:16

when ordering parts: consider that normal pinheaders do not fit (to thick pins), but 1,27mm pinheaders with pins removed do fit good.

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davedarko wrote 10/08/2016 at 17:18

kk cool

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K.C. Lee wrote 10/08/2016 at 17:35

Very nice looking display.

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Alex wrote 12/08/2016 at 21:55

Did you try to built one?

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davedarko wrote 12/08/2016 at 23:16

Yes. And I failed hard, had to reorder the leds, they came saturday... I must put that on my ToDo List :D

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Alex wrote 12/09/2016 at 15:27

:( With some practice 0402 should work. But to be honest my first 0402 component soldering failed also.

Are you sure? yes | no

davedarko wrote 12/09/2016 at 18:55

without a stencil for the solder paste it's just trial and error for me :) maybe later this night I'll be trying again, certainly this weekend.

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davedarko wrote 12/10/2016 at 10:14

Fixed the one LED not shining so I have one working :) the other ones I'll might redo when I need em.

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Alex wrote 12/10/2016 at 10:54

Congratulation! As far I know you have now the 3rd working unit. And white is a nice color choice.

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davedarko wrote 12/10/2016 at 11:04

now that you say that, I thought I've bought warm white LEDs :D oh dear. I might add some 2K epoxy later to make sure it keeps working.

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Yann Guidon / YGDES wrote 10/06/2016 at 06:55

It's looking gorgeous !

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davedarko wrote 09/23/2016 at 16:54

and I've just ordered green LTP-305 from pimoroni... nice work, I might order some.

Are you sure? yes | no

Alex wrote 09/23/2016 at 17:45

Hehe, I was also thinking of ordering some LTP-305. but I hope this will look the same or better. And I can use more exotic colors like white or blue

Are you sure? yes | no

davedarko wrote 09/23/2016 at 21:10

totally in for some blue ones - maybe in some red epoxy for a purple shine.

Are you sure? yes | no

davedarko wrote 10/06/2016 at 07:51

They're also much bigger, bigger is better. Case closed :)

Are you sure? yes | no

reDOT

Details

Components

Project Logs

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some test software for STM8S103F3

sodering 0201 LEDs works!

Try out 0201 LEDs

A video

First Tests

Discussions

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