Hi everybody! I made my little project on arduino UNO. The project is working as it should. I use a high-voltage ignition unit in the project. As soon as I connect it, my system does not work correctly: the stepper motor driver does not work correctly, the UNO arduino does not work correctly, the seven-segment display does not work correctly. Tell me how I can protect my project from electromagnetic interference?
Can you post:
a schematic
links to the parts you are using
Sorry, I tried to write correctly. I did not find such a question on the forum.
How did you determine the problem is electromagnetic interference?
The fact is that when I disconnect the ignition block from the project, the project works as it should (according to the program). As soon as I turn on the ignition unit, the system immediately starts to fail catastrophically.
Have you eliminated all other possibilities, like excess current drain from your power supply. like voltage drops to the Arduino. What exactly happens?
See post #2
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A schematic would be nice.
see post 2
Visually, I can give the following assessment:
The indication of the ULN2003 stepper motor driver starts blinking unnaturally.
Wrong LEDs on TM1637 display.
Arduino UNO does not send commands to the 4-channel relay block.
@roman_arduino
Post #2? One day, no schematic(pen, scrap of paper, photo when done is all it takes), no photo of wiring(how hard can that be?). You may not realize it, but all our crystal balls are in the shop. Without this information, we cannot give useful guidance. Ball's in your court.
FWIW, I suspect you've got a power supply wiring issue(there are many ways to futz this up). But, there are other possibilities.
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Then eliminate the possibility of electromagnetic interference by placing the Arduino assembly inside a metal box for testing.
So in a metal box there will be a short circuit of the contacts if all the project boards are loaded there. How to do better?
Place it inside of a metal box but DO NOT let it touch the box.
um, wrap in bubble wrap then in the metal box; remember, it's a test intended to prove a theory, not a final installation. If the test proves your RFI is radiated, fine. If not, and I suspect not, then it's conducted, and you need to move on, figuring out what about your design or wiring is causing transients to disturb the circuit.
Maybe something needs to be added / soldered to the Arduino board?
post #8
Yes, indeed.
You need to add a schematic
@roman_arduino
Why do you ignore so many requests?
I have no idea what is an "ignition block"? I have no idea how you are powering whatever you have. Less seeing exactly what you have and how what you have is wired or powered I, like everyone else, have no idea what you are trying to do? Less seeing any code nobody knows how you are driving your relay board or how it's even wired. A typical ignition coil draws about 4.0 amps so one more time exactly what is an ignition block and how is it powered?
Less even a crude drawing and explanation of your project I wish you good luck.
Ron
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