Search found 2 matches

by ramosjos321
18 Oct 2019, 15:26
Forum: Basic Schematic and PCB Design
Topic: PWM noise passed on to sensor reading
Replies: 2
Views: 1908

Re: PWM noise passed on to sensor reading

Hi Serg: Thank you for your reply. Do you mean between the Arduino ground and the PCB ground? I'll look at it but I can see that in the end using a 0 Ohm resistor might lead to the same problem in the real board. I tried using one PWM from the Arduino and a square wave from the NI ELVIS board but I ...
by ramosjos321
14 Oct 2019, 15:30
Forum: Basic Schematic and PCB Design
Topic: PWM noise passed on to sensor reading
Replies: 2
Views: 1908

PWM noise passed on to sensor reading

Hi all: I'm trying to design a two gas sensor system where there is a switch to control the heater voltage for each sensor. The heater for the sensor can switch between constant +5V and a PWM. I'm using the PWM from D9 and D10 of an Arduino Nano at about 30 Hz. The system works fine but when one sen...