Hi,
What can happen if the Arduino stops supplying the required voltage?
In my project I use:
-voice recognition module
-dfp mp3
-analog keyboard
-several LED
-temperature sensor
Few days ago all was well.
Today
-Led glows worse.
-mp3 module plays the sound quieter.
Although I didnt change anything.
In addition, the analog keyboard reproduces keystrokes with slightly smaller values. And when the keys are not pressed, the value is 10-20, instead of 0.
I understand that at high loads there can be interruptions. But I tested the keyboard separately, and it showed the same bad results. Power is stable because it is through a computer.
Thanks.
Which Arduino model?
Was it always powered from the PC? Or did you power your project from an external power supply (9V, 12V, ...) in the past?
What's the voltage on the 5V pin when you power from the PC? With and without anything connected.
Did you check for any bad connections?
How many leds? Which series resistors? How many max. on at the same time?
Arduino UNO.
Tried now.
The output voltage is 5.08V
The keyboard is connected last
On it 4.95.
I think this is normal.
Resistors for LED 1kOM.
For the mp3 module the same.
To be honest, the system is behaving better today.
However, the keyboard still performs poorly.
I use this code. It should show 0 if the button is not pressed.
And for example for 1button the value 1020-1023 should turn out
In fact, about 1000
void setup()
{
Serial.begin(9600);
}
void loop()
{
Serial.println(analogRead(0));
}
Thanks