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Topic: is there a way to test out a segment display without wiring it up? (Read 4246 times) previous topic - next topic

nickgammon

I've done a bit more of a write-up below. That shows the schematic and gives a bit more detail.

http://www.gammon.com.au/forum/?id=12314

The basic idea lets you multiplex up to four LEDs (you could probably do even more if you could spare the output pins and allowed for the current consumption).
Please post technical questions on the forum, not by personal message. Thanks!

More info: http://www.gammon.com.au/electronics

Ruffsta

#16
Dec 02, 2013, 09:30 am Last Edit: Dec 02, 2013, 09:34 am by Ruffsta Reason: 1

Temporarily locked ...


for a reason... new displays ordered.. common cathode and i asked nicely to pause the topic, therefore it was temp locked until i got the new parts. because we are going to continue with the max7219 as we started.. just have to swap out the displays when i get them.
Formerly known as "INSIGNIA", you showed me respect and gave me karma points.. but you won't do the same for me now under a different name?

nickgammon

Sure, but don't you want to try making it work with the part you have there? My post showed how to do it with a common anode display, like you have right there.

You seemed keen to get it working, and I spent half the day making up an example showing how you could do just that.
Please post technical questions on the forum, not by personal message. Thanks!

More info: http://www.gammon.com.au/electronics

nickgammon

OK, I'll lock it again. I hope I don't get too many more whining personal messages about it from you or cupstacker.

To anyone else that is interested:

http://www.gammon.com.au/forum/?id=12314

That works well with a 4 digit LED (of course you can make it work with a 3 digit one as well) with no extra hardware apart from 7 resistors.
Please post technical questions on the forum, not by personal message. Thanks!

More info: http://www.gammon.com.au/electronics

nickgammon


k, well i would like to pause this topic until i get the new displays.. is there a way we can temporarily lock this topic?


It's not your job to ask that threads get "temporarily locked". Moderators lock a thread when it gets out of control, as this one seems to have done, like the one of your "friend" cupstacker's.
Please post technical questions on the forum, not by personal message. Thanks!

More info: http://www.gammon.com.au/electronics

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