December 4, 2012
Tutorial - Beginning Embedded Electronics - 1
about 2 years ago
Very good write-up, I do have a question though regarding the use of capacitors for the power supply. You are recommending 100 uF on the input line and 10 mF on the output line. Spec sheet for the LM7805 recommends 0.33 uF on the input line and 0.1 uF on the output line, substantially different values. Why?
Also, the spec sheet for the voltage regulator that I actually have at hand LM2940CT-5.0 recommends 0.47 uF on the input line and 22 uF or larger on the output line. I am not concerned with the exact value here but they recommend larger cap on the output line contrary to what you are explaining. Any suggestion why?
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