Electronics Forum

by **JasonMcG** » Sun Mar 02, 2014 6:02 pm

Design and draw the appropriate circuit to be used in measuring the diode forward current I, using a 5V dc source to forward bias a 1N4148 diode, a 10k ohm potentiometer to vary the dc voltage and a 330 ohm resistor to limit the current through the diode.
Is this the correct circuit? If not, what is the correct circuit?
http://i1362.photobucket.com/albums/r68 ... 8df1b0.png

by **pebe** » Mon Mar 03, 2014 10:27 am

As drawn, the voltage applied to the LH side of R1 is fixed. Make it variable by taking R1 to the wiper of the pot instead of to battery+

by **JasonMcG** » Mon Mar 03, 2014 1:41 pm

How do you draw this?

by **pebe** » Mon Mar 03, 2014 5:19 pm

[quote="JasonMcG"]How do you draw this?[/quote]

I don't understand.

by **JasonMcG** » Mon Mar 03, 2014 5:58 pm

Is this correct?
http://i1362.photobucket.com/albums/r68 ... 89dd94.png

by **pebe** » Mon Mar 03, 2014 6:43 pm

Yes, thats correct.

by **JasonMcG** » Mon Mar 03, 2014 8:04 pm

Thanks

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