Print Page - Prototyping pcb for GPIO

Title: Prototyping pcb for GPIO
Post by: Elecmuso on December 13, 2021, 07:20:08 AM

Hi

Newby to SBCs here.

Are there any prototyping boards available for the GPIO ports for a A20-OLinuXino-LIME2?

I'm thinking something like this which is for Raspberry pi
https://www.amazon.ca/Raspberry-Prototyping-Breadboard-MakerSpot-Connector/dp/B07B4TRVFD

Title: Re: Prototyping pcb for GPIO
Post by: LubOlimex on December 13, 2021, 04:55:35 PM

I can recommend LIME2-SHIELD: https://www.olimex.com/Products/OLinuXino/A20/LIME2-SHIELD/open-source-hardware

and this:

https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-LIME2-UEXT/open-source-hardware

Title: Re: Prototyping pcb for GPIO
Post by: Elecmuso on December 14, 2021, 01:43:00 AM

Thanks!

I feel a bit thick for having to ask this. But looking at the schematic the LIME2 shield product has a line in input but no ADC. My understanding is that the A20-OLinuXino-LIME2 has no ADC itself which is why I was looking into adding an ADC, so how does the SBC take in the analog signal? I must be missing something obvious!

Title: Re: Prototyping pcb for GPIO
Post by: LubOlimex on December 14, 2021, 08:58:13 AM

A20 chip has two ADCs but they are not very good - 6-bit, input 0-2V, usually used for buttons. Check the datasheet for LRADC.

You can check also MOD-IO and MOD-IO2 boards if you wish to expand the analog capabilities of the board.

https://www.olimex.com/Products/Modules/IO/MOD-IO/open-source-hardware

https://www.olimex.com/Products/Modules/IO/MOD-IO2/open-source-hardware

Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: Elecmuso on December 13, 2021, 07:20:08 AM