Limits to adding components to an Arduino Uno

Other Hardware General Electronics
1

I am using an Arduino Uno, it used to work perfectly until I added my Ultrasonic sensor.
Previously, I had used:
4 digit,7 segment display(Common anode,no transistors)
Red LED
Push button
DHT 11

After I added my ultrasonic sensor, the laptop didn't even show that I had connected my arduino to it.The arduino started heating a lot even though green LED was off.After I removed the ultrasonic sensor, everyting worked perfectly, so I beleive that the Arduino was trying to pull more current than it could handle.(pls correct me if I am wrong)

So, is there a way that I could safely add an ultrasonic sensor and a buzzer without risking my arduino without transistors.
Thanks in advance

I hope this is the right category for the question.

2

If you have another Ultrsonic Sensor, try with that one.

1 Like
3

Post your current schematic and sketch.

4

I dont have another ultrasonic sensor but thanks for the suggestion.
I also make sure that i dont risk my arduino at all.

5

Sure. It will take some time but I will post it

6

Either the sensor is bad or you had it connected backwards, which several people have done.

7

If you are talking about HC-SR04 kind of sensor, it's not adding your current draw a lot, maybe 10-20mA, so there is no problem. Either it's broken or more likely what @jim-p wrote above

8

Which one? Which buzzer?

9

Thanks!!! It works
I made a silly mistake :sweat_smile:
I somehow re wired the thing but still made the same mistake

10

You are not the first.
Glad it's working.
Have a nice day!

11

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