Machsupport Forum

Third party software and hardware support forums. => PoKeys => Topic started by: SScnc on August 18, 2011, 12:57:53 PM

Title: Input Noise
Post by: SScnc on August 18, 2011, 12:57:53 PM

I'm having noise issues with false triggers on my input pins. Is there any settings to filter the noise? Kind of like the debounce?

Thanks

Title: Re: Input Noise
Post by: borisz on August 18, 2011, 01:37:40 PM

Can you please add a schematics how and what you connected to PoKeys?
For digital inputs there is no hardware debounce. There is a very cheap and easy way to get in order with hardware.
For example 100nF ceramic capacitor connected to between PoKeys input and GND could help a lot.

Title: Re: Input Noise
Post by: SScnc on August 18, 2011, 02:30:53 PM

I just have 7 switches all as digital inputs. Do I need a capacitor for each input? The terminals on the board are very small.

Title: Re: Input Noise
Post by: borisz on August 18, 2011, 02:45:16 PM

Yes, you need cap for each input.  Please connect them with shortest possible wires.

Title: Re: Input Noise
Post by: SScnc on August 18, 2011, 03:54:10 PM

How am I suppose to put 7 caps on this board with how small the terminals are?

Title: Re: Input Noise
Post by: borisz on August 19, 2011, 02:23:17 AM

One by one.
Just do it it can be done ;)

Title: Re: Input Noise
Post by: SScnc on August 19, 2011, 08:58:11 PM

Okay I got it done. Seems to work well. No false triggers.

I didn't have any 100nF caps. All I had was 1.0uF but it seems to work well. Thanks