How Do I know If My Arduino Board Is Fried? (Reasons You Should Know)

Arduino is fried

Working with Arduinos is exceptionally basic when it comes to its user-friendly IDE software which is an open-source hardware program, and simple to use with each board. But the genuine inconvenience starts after you accidentally make the off-base associations or supply the inaccurate voltage to your board.

So, how would you know that your Arduino is fried?

The answer is yes! There are some cases like excessive of voltages, and supplying over current you can end up damaging your Arduino board. The 4th scenario is the most common one to know about.

Arduino boards are fragile when it comes to voltage and current surges—the foremost common issue that clients conclude upon signing their boards.

Though not simple, there’re a few ways to discover in the projects that your Arduino isn’t working as it needs to be.

You would like to scrutinize your board and pay consideration to as numerous points of interest as conceivable. This blog will direct you through the steps to check it out.

What Does “Frying an Arduino” Mean?

“Frying” doesn’t mean to hurl your Arduino into a broiling skillet and put it on the stove! It alludes to the situation when the Arduino board is electrically devastated. You can’t utilize them anymore. If you encounter a burning odor coming out of your board, which means your Arduino is browned.

Why do people fry Arduino?

Well, no one wishes to sear up their valuable Arduino board and let the fun go down the drain. People ordinarily damage Arduinos by mischance, by either applying the off-base voltages or making inappropriate connections.

Here are 5 of the most common causes users end up frying their Arduino board:

1. Applying the Wrong Voltage on The Input Pins

The working voltage of most Arduino boards is 5V, whereas others work at 3.3V. Meaning that in case you supply voltage to the input pins higher than the working voltage, at that point you’ll conclude up frying your board since the voltage controller diode will burn out.


Most individuals think that the voltage controller will look out for the overabundance voltage, but that’s not genuine. The voltage controller as it were works for the barrel connector and the USB port.

2. Short-Circuiting

a schematic of a short circuit explained

Picture Source: Short circuit picture (engineers-educators)

Another common practice that has devastated numerous Arduino boards is short-circuiting. While working to an extent which encompasses a lot of output and input pins included, you will end up interfacing a yield stick to another yield stick or an input stick to another input stick. That’s absolutely where the inconvenience begins.

When two I/O pins are associated, and one is set too tall, and the other is set too small. The foremost likely result would be that the pins will get harmed for all time since there is an overabundance of current streaming through the pins.

Recommended Reading: If you are not sure about the short circuit, you should give it a read about the three main electrical components of  electrical engineering where a detailed guide about short circuit would make your thoughts clear.

3. Drawing More Current from The Yield Pins

The most extreme current that can be drawn from an Arduino may be settled in an esteem that you simply can discover in its datasheet. Let’s consider the Arduino UNO board, for example. According to the Arduino site, the greatest DC that can be drawn or provided from/to an I/O stick is 40 mA.

In this manner, on the off chance that you bring more than 40mA by interfacing an overwhelming stack to your UNO board, it’ll harm your board permanently. Similarly, there’s a restrain to the most extreme current you’ll draw from all of the yield pins combined. Surpassing this restraint would moreover harm your I/O pins.

4. Providing the Off-base Voltage to The Vin Pin

In case you don’t need to utilize the barrel connector or the USB port to control up your Arduino, you’ll be able to select to utilize the Vin pin. The Vin stick is associated with the voltage controller display on the board, which changes over any voltage up to 12 Volts to 5 Volts. Meaning that in case you supply the Vin stick with an energy of more than 12 Volts, at that point you may conclude up broiling the voltage controller and, eventually, your Arduino board.

5. Inactive Charges

Electronic gadgets are exceptionally delicate to electrostatic charges. In this manner, they’re kept in anti-static bundling most of the time. Arduino is well prepared to battle against electrostatic charges since it has an inbuilt diode that secures against inactive charges. However, in the event that the inactive charges influence the board for a long time, the diode may end up getting harmed.

6. Wrong Port

It may be so confusing that you are not sure if the problem is in my connections, or the Arduino port doesn’t match with the same port. You don’t need to untie all your Arduino connections, just select the right port from the Arduino IDE software and your Arduino will be working smoothly.

How to Discover If your Arduino Is Fried?

Presently simply know what the driving causes of Arduino sheets getting fried are, you’ll be able to effectively discover in case your Arduino is fried. If you keep in mind making any of the botches specified above, at that point you’ll be able to rapidly figure out whether your Arduino board is working or not.

In case you don’t keep in mind making any of those botches, at that point, you’ll be able to check each of your Arduino’s components independently to decide whether they’re burning or not as follows:

  1. Power up your Arduino through the USB port, check the green control LED. If it is working, that likely implies your board has not been fried.
  2. Check the 5V and 3.3V pins to see in the event that they are giving the precise voltages by employing a voltmeter. In the event that these pins are giving the proper current, this demonstrates that your voltage controller has not been blown up.

For assist affirmation, you’ll be able to control your Arduino using the barrel connector and after that check the yield of the voltage regulator. If you don’t know how to utilize a voltmeter to check the voltages on your Arduino board, press here. This will ease the errand for you.

Checking the board smoked protection diode

  1. Check the diode (you’d require a multimeter with its handle set on the diode check position).
  2. Then, placing the tests on each side of the diode, you’ll be able to check in the project that it is working. The perusing on your multimeter must be somewhere around 0.6 to 0.7 mV.
  3. If the voltmeter does not appear in any esteem, meaning your diode isn’t working, and you would like to have it fixed.

Another strategy to test your Arduino is to examine your board for signs of burn such as dark burn marks, expanded ICs, or bizarre bumps on any of the components implanted in it.

SOPs from frying you Arduino

I recently fried up the Arduino because I didn’t make sure of the connection before turning on the switch, but it was a great lesson to learn. I compiled a list of the problems that would be a reason to fry up your Arduino. So, don’t mistake what I did.

Here is a checklist that you don’t match with any of the following because that would fry up your Arduino.

  1. Double check the Short-circuiting in your circuit before turning on the switch because if you short circuit the I/O pins you could damage your Arduino.
  2. Shorting I/O pins to ground and each other.
  3. Apply more than 5 volt to a 5 volt connector that would damage your Atmega.
  4. Apply more than 3.3 voltage to a 3.3 voltage connector.
  5. Apply more current to the microcontroller than its limit.

Recommended Reading: you have gone through the whole blog and I am sure you must have understood why your Arduino fried, a detailed guide about Arduino UNO and Arduino MEGA 2560 would help you to understand about their current and voltage limitations. So you don’t give it excessive current and voltages.

Mataf Khan

An electronics enthusiasts from childhood became an electrical engineer, I've been playing with Arduino and other electronics gadgets like raspberry pi since when I was 14. and have a passion of troubleshooting Arduino problems.

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