Search found 7 matches

by gabvoir
06 Oct 2018 20:01
Forum: Z-Uno
Topic: Unstable power from the Z-uno?
Replies: 8
Views: 4008

Re: Unstable power from the Z-uno?

I make another test, I tried supplied by an USB battery,and i encountered another situation. It seem to be ok but however when I touch the battery it detect as i touch the sensitive bar.
Maybe a ground isolation problem.

Do you know how can I solve it ?
by gabvoir
26 Sep 2018 07:47
Forum: Z-Uno
Topic: Unstable power from the Z-uno?
Replies: 8
Views: 4008

Re: Unstable power from the Z-uno?

Does anybody have an idea to help me?
by gabvoir
14 Aug 2018 15:21
Forum: Z-Uno
Topic: Unstable power from the Z-uno?
Replies: 8
Views: 4008

Re: Unstable power from the Z-uno?

Oups sorry, I reuse this topic, beacause it seems to be the same problem. Exact, MPR121 use I2C communication. I use this tutorial from chipkit and the library from Adafruit MP121 that I have personalize to use auto config. The problem is that MPR121 return fake touched state. I suppose it's a power...
by gabvoir
28 Jul 2018 13:46
Forum: Z-Uno
Topic: Unstable power from the Z-uno?
Replies: 8
Views: 4008

Re: Unstable power from the Z-uno?

Can you try to define the voltage at 3.3V - is it stable? The output 3.3V from z-uno supplied by computer or by usb charger is always 3.06V, with or without charge on my sensor. Additional you can add a capacitor to the 3.3V output to eleminate any peaks - depending on the needed power it could be ...
by gabvoir
08 Jul 2018 00:32
Forum: Z-Uno
Topic: Unstable power from the Z-uno?
Replies: 8
Views: 4008

Re: Unstable power from the Z-uno?

Hello, I think that I have the same problem. I use a TouchClamp Click Mikroe based on MPR121 and supplied with 3.3V. However it seem that the MPR121 does not react the same way if its supplied from computer USB or a charger . I supposed that my charger deliver an approximative 5v and z-uno fails to ...
by gabvoir
29 May 2018 23:21
Forum: Z-Uno
Topic: i2c / TouchClamp
Replies: 0
Views: 1563

i2c / TouchClamp

Hi, I would like to use a TouchClamp click board from MikroElektronika https://www.mikroe.com/touchclamp-click . I've find a tutorial based on Arduino https://electronza.com/chipkit-vs1053-touchclamp-drums/2/ . Unfortunately when I apply to z-uno, it have unpredictable behaviour and i can't communic...
by gabvoir
28 Jun 2017 14:00
Forum: Z-Uno
Topic: Knock sensor - analogRead unstable
Replies: 1
Views: 1806

Knock sensor - analogRead unstable

Hello, I would like to make a knock switch. I apply the official Arduino tutorial : https://www.arduino.cc/en/Tutorial/Knock Unfortunately i'm blocked by an analogRead issue. Firstly I think it was due to my piezo sensor, but I change, same thing. Finally, I realized that even the pull-down resistor...