in this video we look at a Classic Circuit You Should Know - The Zener biased LED driver. Here is a link to the calculator: www.pcbheaven.c...
In this circuit, the base current is fixed by the Zener diode. If the base current is fixed, the emitter current is also fixed. So small changes in supply voltage will have very little effect on the LED.
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Негізгі бет How to design and build an LED constant current source using a Zener Diode
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