D5 is the device under test. The scope X-Y leads go across R2 and D5 with the ground in the center.Here are some screen shots of diodes being tested.
Saturday, May 21, 2016
Poor man's curve tracer
Tried to build a simple curve tracer today. It does work. Used a broken wall wart, three terminal and four diodes. After I built I tried a SPICE model to draw the diagram and run a simulation. Here is the drawing.
D5 is the device under test. The scope X-Y leads go across R2 and D5 with the ground in the center.Here are some screen shots of diodes being tested.
The wall wart I used was rated 15 Volts. You could go a little higher or lower but 15V gave good results for diodes, LED and transistor junctions.
D5 is the device under test. The scope X-Y leads go across R2 and D5 with the ground in the center.Here are some screen shots of diodes being tested.
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