Diode resistor circuit

  • Engineering
  • Thread starter yoyo13
  • Start date
  • #1
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Homework Statement



Find Voltage/Current across each diode:

----R---
|..........|
V.........D
|......... |
----R---

Repeat 50x until:

----R----
............|
............D
............|
----R----

V = power source
D = diode
R = wire resistance
. = empty space

Homework Equations



for diode:
V = 0.04654 * ln(I/(0.62E-19)) + I*6.97

for wire:
R = pl/A = 0.02 ohms

Final diode voltage = 2V
Final diode current = 20mA

The Attempt at a Solution


Attempted to use v = ir with wire resistance to find voltage over last-1 diode, but did not work out as current got higher as worked back to source.
 

Answers and Replies

  • #2
Redbelly98
Staff Emeritus
Science Advisor
Homework Helper
Insights Author
12,115
151
Welcome to PF :smile:

It took me a while to figure out how the circuit looks from your description.

It sounds like you are on track to solving this. The diode currents (and voltages) should get higher as you get closer to the source.
 

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