A resistor will most likely be needed at the base lead of a transistor if the transistor will be used as a switch. The formla below is a special formula that is used only if the supply voltage is the same as the voltage being applied to the base lead of the transistor
Resistance = LoadCurrent x LoadResistance x Hfe(transistor rated)
R = .2 amps x 25 ohms x 200
= 1000 ohms or 1k
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.