Hello,
Do you have a link for a description as to why the Arduino PWM Output voltage drops to 4.86 Volts when an LED and 330 Ohm resistor are added, and remains at the expected voltage of 5 Volts open circuit? Thanks so much.
Pete Vree
Only 4.86 Volts at PWM Output Pin
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- adafruit_support_bill
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Re: Only 4.86 Volts at PWM Output Pin
The output transistors have some internal resistance, so the voltage drop will be proportional to the current draw.
See the discussion on the topic here: https://forum.arduino.cc/index.php?topic=106346.0
See the discussion on the topic here: https://forum.arduino.cc/index.php?topic=106346.0
- petevree
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- Joined: Wed Oct 18, 2017 2:19 pm
Re: Only 4.86 Volts at PWM Output Pin
Thank you so much for the prompt reply!
Please be positive and constructive with your questions and comments.