/diy/ - Do It Yourself

Anonymous Fri Oct 13 12:46:12 2017 No.1259710 [View]
File: 10 KB, 220x311, currentsource.png [View same] [iqdb] [saucenao] [google]

I see a lot of simple current sources with this topology but I don't understand how it would be used for currents of an amp or more. Wouldn't R2 need to have a very low resistance and thus need to be very large to dissipate the heat?

Trying to drive about 0.7-1A through an LED as the load, so the sense resistor would get very hot. Is there an alternative way of doing this or would I be better off using an emitter follower and limiting the current into the base to control the current through the load?

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/diy/ - Do It Yourself

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