Many questions about 7 segment display modules

[Sling]

I have no way of knowing how much background work anyone has done so I’m not trying to be clever here. As I said the cap information has been addressed before hence Keith’s comment. This is what I meant by research. I did also caveat it by saying that you can’t always win. We all get things wrong. This obviously slipped through your net this time.

[Kaellis991]

The info has made it to my net in about the usual time frame it takes to separate the wheat from the chaff.
That lesson has not been lost on me.
Its obvious that this is not a simple radio build as previously envisioned. There are premade radio options from a few manufacturers out there that I am now pursuing which will allow me to dispense with AM for this last phase of my cockpit build.
There is no educational value going that route, but at 70 years of age I am tired of the chase.

[Keith Baxter]

Hi,

We discussed this previously. If you send a value (123.05) to these MAX7219 boards the value will be reversed and you will only show 2 digits.

Reason is that the AM library uses the board with 8 digits. The IC DIG7 is the left most digit on the display.
On these boards the ICDIG0 is the left most digit on the display.
That means that the AM library is trying to send from DIG7,DIG6 and DIG5 which are not connected in this board.

Keith

[wendy]

Hi @wendy, what is your status on your remaining parts and ability to sell to simmers ? Still some solution ?

Yes I still have them available, so please mail me if you want to order some.

[Keith Baxter]

Hi @wendy, what is your status on your remaining parts and ability to sell to simmers ? Still some solution ?

Yes I still have them available, so please mail me if you want to order some.

@wendy
Hi,
How are your boards wired?
DIG0 to display D! or DIG7 to display D1

It would be cool if it is wired DIG7,DIG6,DIG5,DIG4,DIG3 to D1,D2,D3,D4,D5.

Keith

Edit: I see your boards use not a max7219. Am I correct?

[SimPassion]

Hi @wendy, what is your status on your remaining parts and ability to sell to simmers ? Still some solution ?

Yes I still have them available, so please mail me if you want to order some.

@wendy
Hi,
How are your boards wired?
DIG0 to display D! or DIG7 to display D1

It would be cool if it is wired DIG7,DIG6,DIG5,DIG4,DIG3 to D1,D2,D3,D4,D5.

Keith

Edit: I see your boards use not a max7219. Am I correct?

Yes these are 74HC595D mounted, so the MessagePort library way ...

[Keith Baxter]

Yes these are 74HC595D mounted, so the MessagePort library way ...

Thank you for that Gilles. I suspected.

All these different boards keep popping up left right and center and the AM users get confused.

Hopefully @Corjan and @Ralph are understanding the forward trend.

Maybe the Easter Bunny will put something new in the basket for us.


Keith

[Ralph]

Not really sure what you mean... But I think it was mentioned here already somewhere on the forums. The memory of the Arduino's is limited, so we cannot add each and every display, motor driver, etc...

[Keith Baxter]

Not really sure what you mean... But I think it was mentioned here already somewhere on the forums. The memory of the Arduino's is limited, so we cannot add each and every display, motor driver, etc...

Hi,
Is it not as simple as changing the library from this depending on display wiring....

Code: Select all

*********************************************************************************************************
* LED Digits:      
*   Register bits:
*      bit:  7  6  5  4  3  2  1  0
*            1  2  3  4  5  6  7  8
*********************************************************************************************************

To this...

Code: Select all

*********************************************************************************************************
* LED Digits:   
*   Register bits:
*      bit:  0  1  2  3  4  5  6  7
*            1  2  3  4  5  6  7  8
*********************************************************************************************************

I think I should go back to my Sinclair ZX80



Keith

[jph]