Hexadecimal 7 segments display (continued)

A project log for Discrete YASEP

a 16-bits YASEP computer (mostly) made of DIP/SOIC chips like in the 70s and 80s... with 2010's twists!

yann-guidon-ygdesYann Guidon / YGDES 11/07/2015 at 00:214 Comments

I received the white 4014 LEDs ! I couldn't wait to try them.

My 7 segments assembly is about as wide as the TIL311 and the digit is about 2x bigger, more readable (IMHO) even though it lost some charm.

Another important aspect (for me) is the very thin profile. That's an excellent choice for my expected use :-)

These LEDs can output 200mW so they are not in their expected application domain. A CR2032 (3V Lithium coin cell) makes lights it very brightly. The good part though is that they are performance-optimised so they can shine with very little current.

So the advantages :

I now have to see in practice how the visual aspect works, I will have to tune things for more comfort. I'll see if a filter (white paper ?) is necessary...


Yann Guidon / YGDES wrote 11/07/2015 at 04:25 point

Hi Eric,

the SMD board is a souvenir from Canada, they have some cool stores in Toronto :-) the board is marked 

The form-factor is not new, it's used for LCD screen backlight. If you get LED backlit frames, you might find a very thin PCB on one edge, that looks like the picture I posted at the bottom of

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Eric Hertz wrote 11/07/2015 at 06:25 point

Groovy. Those breadboards gave me a great idea... working on it right now. 

Also that link for the log... whoa, this project is a wealth of project-logs I keep coming across out of order. I should start from the beginning!

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Yann Guidon / YGDES wrote 11/07/2015 at 06:27 point

Sorry if this gives you some vertigo but it's only the beginning.

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Eric Hertz wrote 11/07/2015 at 04:02 point

Whoa, never seen that form-factor. Cool. And what's that "breadboard" you're using?

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