MobiFlight Community Support

Welcome to the forum for MobiFlight! Feel free to reach out to the community in case you have questions, issues or just want to share great ideas or details about your latest home cockpit project.

You like MobiFlight? Donate via PayPal and support the MobiFlight development. Thanks! 

icon
Avatar
pianista
Posts: 4
Hi!

I'm doing all my radio modules using MAX7219 but all the configurations I found are with 8 digits.

Is there alternative to MAX7219 with less digits without doing an entire PCB? If may be 5 are strange, 6 could be OK...

Because It's a bit strange having 8 digits in your board if you are going just to use 5 (also it makes the board bigger).

Thank you!
Regards
2019-11-11 10:57
Avatar
pizman82
Moderator
From: ETSI, Germany
Posts: 2916
Supporter
You talk about the "premade" Tubes.

Here there exist basicly 2 sorts..... the Fixed Tubes (mostly with a red or blue PCB ) and the Removeable ones with mostly green PCB .

This are the removeable ones..... https://eckstein-shop.de/8-Digit-LED-Display-Digital-Tube-Red-MAX7219
Here the 2x4 Disply blocks are just connected to headers..... NOT solder like the other brands.

In that Case you can simply remove the 2 Blocks..... Then you have 2x12 free Pin socket. And THERE you can connect wires.
If you need a 5 Digit Display you can buy one ( Common Cathode) ..... that have normaly 13 Pins ( 7xSeg 1xDP 5x Cathode) and you then wire it to the needed 13 Pins on the empty Max Chip.

With this technic nearly every combination is possible.

Check this for example to see a good system. ( At Min 8.00 and later) https://www.youtube.com/watch?v=mZQ7AF4_1k0
Good Luck !
2019-11-11 15:37
Avatar
DocMoebiuz
Moderator
From: NW of KPWK, United States
Posts: 1441
What real world radio do you use as reference?
It’s easy to mask the digits that are not used so that it looks like there are only 5 but in fact it’s eight just 3 are hidden behind the front panel, e.g 1 digit to the left and 2 digits to the right.
Have a great day!
Sebastian

MobiFlight - Simply build your own home cockpit for your favorite flight sim - FSX, Prepar3D (FSUIPC), X-Plane (XPUIPC)
2019-11-12 03:41
Avatar
pianista
Posts: 4
Thank you, I'm trying to do a radio panel for C172/BE58.

I know may be there are some differents, but I'm not thinking in the details for now, more in the electronic part.

Ok I'll check this links! Thank you!

Regards
2019-11-12 16:50
icon