How to use AH_QVAR on STEVAL MKI250KA

[Luisa_97]

Hi, I have STEVAL MKI109D, on it I mounted STEVAL MKI250KA. I would say if I could use QVAR Swipe Electrode mounted on STEVAL MKI250KA for reading Qvar signal. It is possible?

[casadeib]

Hi @Luisa_97 ,

In order to use QVAR Swipe electrode on STEVAL MKI250KA there are some modification that have to be implemented, otherwise for QVAR functionalities you can use MKI235KA.

Hope this could help.

[Luisa_97]

Hi @casadeib ,

Could you specify what modifications are required? I am usinf MKI235KA, but I would like to compare the signals recorded from both devices in MEMS-Studio to observe any differences. 

Thanks.

[Federica Bossi]

Hi @Luisa_97 ,

Series capacitors CS1 and CS2 are used to remove DC voltage. By replacing these capacitors with a short, it can be used for UI applications (it is recommended to set the gain to 16x to ensure saturations).