Brief LM334 Three Terminal Adjustable Constant Current Source

Current through an LM334 is set by one external resistor. Simply divide 0.064V by the resistance between pins R and V- to get the current in amps.  I = 0.064V/R. Some easy to calculate examples are shown in the diagram below.

LM334 three terminal adjustable current source set voltage schematic diagram by electronzap
LM334 three terminal adjustable current source set voltage schematic diagram by electronzap

Any components in series will have the same amount of current flowing through them as what is set by the LM334 as long as they don’t already limit current even more than that.

Simple LM334 three terminal adjustable constant current source circuit schematic diagram by electronzap electronzapdotcom
Simple LM334 three terminal adjustable constant current source circuit schematic diagram by electronzap electronzapdotcom

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