Hi, I have the Arduino Mega 2560 R3 control panel and the charging port is no longer working. We have only had this product for about a month so it is unclear why. Is there a way to replace just the port or would we need to replace the whole board?
Thanks!
Can you post a photo of this 'control panel', that is not anything I know about.
@jcarr5 , welcome to the forum.
Ditto. Also a bit confused as to what this is?
Welcome!
The Arduino Mega 2560 R3 does not have a power port as such. It has the barrel connector which feeds the regulator and passes the output to a pin via a diode. The USB communicates and supplies 5V to the board.
Please show us an annotated schematic and some clear close pictures showing exactly what we are talking about.
Hopefully this helps:
Gil's Crispy Critter Rules #19 for Processor Hardware:
Rule #1: An Arduino is NOT a Power Supply!
Rule #2: Never connect anything inductive (motors, speakers) directly to an Arduino!
Rule #3: Avoid connecting or disconnecting wires while the power is on.
Rule #4: Do not apply power to any pin unless you are certain of what you're doing.
Rule #5: Do not exceed the maximum voltage or current ratings.
Rule #6: Many Arduinos cannot power transmitters directly.
Rule #7: Before powering your project, take a break and double-check the wiring.
Rule #8: Bad soldering makes for project failure.
Rule #9: Do not reverse power connections.
LaryD’s Corollaries:
Coro #1: When starting out, add a 220Ω resistor in series with both input and output pins to protect against shorts.
Coro #2: Invest in a Digital Multi-Meter (DMM) to measure voltages, currents, and resistance.
Note: Violating these rules can turn your Arduinos into crispy critters. For optimal performance, keep your wires under 25 cm (10 inches).
Additional Tips:
The L293 motor driver, though common, is inefficient as it can lose around 3V as heat when driving both legs of a motor. Consider using a motor driver with MOSFET outputs to reduce heat loss and conserve battery power.
Not all motor drivers work with each motor, they have to be compatible.
The nRF24 radios do not work very well when powered with an Arduino even if the 5V adapter is used.
For more on powering Arduino boards, explore this guide: Powering Alternatives for Arduino Boards.
Connecting power backwards generally destroys parts in nanoseconds IE faster then fuses.
What voltage is the AC adaptor?
Does everything work if you power the Mega via USB port with power adaptor disconnected?
What was connected to he yellow and blue cable?
Have you used this board for other projects? Was it working when you finished them? What is the power adapter rated for? What else is connected?
I'm not sure what the voltage is. Everything works when it is powered with the USB port, yes. The blue cable is the ground wire and the yellow is 3 wires grouped together that are connected to the board. We are using this to make a LIQ HD.
No, we have not used this board for other projects. It was working and randomly stopped working about two weeks ago. We have only had the board for a couple months and it hasn't actually been used yet, just tested.
It doesn't state the voltage and current rating on the box or on the adapter itself?
Could you show a clear photo of the reverse side of the adaptor?
That may be your problem. If it was too high you may have burned out the Mega on board regulator.
We never adjusted the voltage or anything like that though, so I'm not sure how that could have happened
If you have no idea what the voltage is, it could have been wrong fron the very beginning.
I meant a photo of the reverse side of the AC adapter?
We never adjusted it though. Is there a way I can test the voltage?
Is the connector on the power supply the correct size to properly mate with the connector on the Arduino Mega 2560?
There are several different sizes of that type of connector. The correct one has an outer diameter of 5.5mm, with a 2.1mm diameter hole.
If a connector with a larger hole diameter is used, it is possible that it does not make contact with the pin on the Arduino's connector.
Oh! I didn't realize that's what you were referring to it says 100V~240V.
It fits properly