Hi there and thank you for helping,
I have been working with microcontroller for a couple of years now, mainly Arduino Uno/Nano, ESP32 and Attiny85.
With the latter i am trying to build a fan controller that uses a 10k Potentiometer to control the spped of a 12vfan, meanwhile a WS2812 ring made of 12 LEDs is updating to indicate the speed level based on how many leds are on.
A voltage divider connect the signal from the potentiometer to the Attiny PB2 port in order to shift voltage. Everything works fine except for the fact that the voltage on PB2 is not totally stable and this creates a misreading, resulting in the Ws2812 leds blink or turning on faultly, any ideas on how to stabilize the aforementioned voltage? Thank you
//#include <SoftwareSerial.h>
#include <util/delay.h>
#include <Adafruit_NeoPixel.h>
// Clock at 8mHz
#define F_CPU 8000000 // This is used by delay.h library
// Which pin on the Arduino is connected to the NeoPixels?
// On a Trinket or Gemma we suggest changing this to 1:
#define LED_PIN 4
// How many NeoPixels are attached to the Arduino?
#define LED_COUNT 12
const int FETPin = 1; // Only works with Pin 1(PB1)
const int POTPin = A1; // Potentiometer Pin
// Declare our NeoPixel strip object:
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
void setup()
{
// Serial.begin(9600); // send serial data at 9600 bits/sec
pinMode(FETPin, OUTPUT);
pinMode(POTPin, INPUT);
strip.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
strip.show(); // Turn OFF all pixels ASAP
}
void loop()
{ int in = analogRead(POTPin);
if (in > 740) {
digitalWrite(FETPin, HIGH);
}
else {
digitalWrite(FETPin, LOW);
}
int y = map(in, 740, 830, 0, 12);
for (int a = 0; a <= y; a++) {
strip.setPixelColor(a, strip.Color(0, 0, 200)); // Set pixel's color (in RAM)
}
for ( int b = y; b <= 12; b++) {
strip.setPixelColor(b, strip.Color(0, 0, 0)); // Set pixel's color (in RAM)
}
strip.show(); // Update strip to match
// Serial.println(in);
// Serial.println(y);
_delay_ms(200);
}
. I am using ceramic capacitors for both the input and the output, do you think i should use an elctrolytic one for the input? I would try to implement your suggestion and report back.