To determine the current in a portion of a circuit, Ohm's law can be applied.
In this case, the current is being determine to find an appropriate transistor. So, prior to adding the transistor, the current is found and the transistor with at least that current rating can be selected.
Ohm's Law:
Current = Volts/Resistance
I = V/R
Example:
I = 5v / 25 ohms
= .2 amps
Comments and Additional Information
Have some code to share? Or additional information? Respond here:
You need to be logged in to save a response on this page. The response must be constructive, helpful, supplimentary or to correct the existing video, code or narrative content.