Encoder with OPTA [Solved]

[max246]

I am trying to hook up the encoder e38s6g5-600b-g24n which works fine with a normal Arduino uno and yes it can take from 5v to 24v, so it shoudl be working fine.

The issue I suspect is the output voltage of the cable A and B that are not high enough to trigger the interrupt on the OPTA.

is there a way to change the sensitivity or I need to get an opamp to boost the voltage?

[DaveX]

@max246

e38s6g5-600b-g24n

This thread says that INPUT_PULLUP will work:

FYI: interfacing E38S6G5-600B-G24N 600P/R rotary encoder

This is an FYI, sort of a post-mortem. TL;DR: supply >5V and specify INPUT_PULLUP. E38S6G5-600B-G24N is an industrial 600 pulse/revolution A/B bi-phase rotary encoder; this product, among many like it, are used for building DIY racing wheel controllers for its higher resolution compared to garden variety potentiometer-like incremental encoders. Interfacing wise, works mostly the same. The only differences are that it needs 5V-24V power input, and that the output is "NPN-type" which necessitate …

[max246]

I tried with INPUT_PULLUP but didnt work. If I apply 12v to that interrupt pin I can see the function getting called, so I suspect the voltage coming out is not high enough

[TomGeorge]

@max246

I tried with INPUT_PULLUP but didnt work. If I apply 12v to that interrupt pin I can see the function getting called, so I suspect the voltage coming out is not high enough

Have you got a DMM?

@max246

I am trying to hook up the encoder e38s6g5-600b-g24n which works fine with a normal Arduino uno and yes it can take from 5v to 24v, so it shoudl be working fine.

What ab-normal Arduino are you trying to connect it too.

Can you please post the UNO code and the ab-normal code?

Thanks... Tom..

[max246]

Actually never mind, using external pull-up resistor I managed to trigger using the 12V.

Arduino OPTA has a wider range of voltage input and I suspect it needs a higher voltage to trigger LOW and HIGH.

Just applied 2k across 12v and the interrupt, I can now read the steps

[numpad0]

I dusted off an old project and my solution didn't work: it makes 5V internally with a 78L05. So "5-24V" is a lie, it needs 7V. I've updated the original thread. Sorry for confusion.