Current Limiting Resistor Vs Voltage Limiting Resistor. You always need a current limiting device. The limiting current resistor is answering.
When using a voltage source you should always have a resistor think about what happens when the voltage changes by a small amount. What is a popular way to reduce the current for them. A simple example is a resistor in series with an led.
We need to reduce the voltage down.
I led is the forward current of the led. A current limiting resistor helps mitigate the effect of voltage increases by virtue of its linear iv curve. Voltage limiters are semiconductive such as. When computing the value of a current limiting resistor for a single led the basic form of ohm s law v ir becomes.
