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Voltage is the difference in electric potential between two points of an electric circuit, measured in Volts (V). Voltage can be constant (DC) or varying (AC).

1 vote

Connecting 5V arduino logic with 12V car logic

I found this that may be helpful to you. this circuit allows for bidirectional communication between automotive K-line ECUs and an arduino. K-Line Interface circuit
MrFixIt87's user avatar
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1 vote

Can the Arduino be hurt by connecting too many LEDs in serial?

This is for typical green, yellow, red type LEDs that have a 2 volt or so forward voltage drop. Note: some other colors require more forward voltage. … This resistor limits the current induced by any driving voltage which is over the voltage needed to drive the LEDs to conduction. …
MrFixIt87's user avatar
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