Circuit Lab B/C

User avatar
krasabnk
Member
Member
Posts: 32
Joined: March 4th, 2018, 10:08 am
Division: Grad
State: NC
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by krasabnk » April 15th, 2019, 6:30 pm

UTF-8 U+6211 U+662F wrote: I love this drawing
8.36 kiloohms?
Thank you, haha!
Looks good, your turn :)
DaVinci's Dragons 2019, NCSU '23
[b]2019: [/b]
regionals/states
 <3 Herpetology: 1/3
 :evil: Circuit Lab 5/15
 :?: Experimental Design -/19

[b]2018: [/b]
regionals/ states
<3 Herpetology: 1/4
 :?: Disease Detectives: 4/19

UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1523
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA
Has thanked: 0
Been thanked: 1 time

Re: Circuit Lab B/C

Post by UTF-8 U+6211 U+662F » April 16th, 2019, 8:33 am

Simplify the following logical expression in terms of only AND and OR: XOR(A, XOR(B, AND(NOT(OR(A, B)), NOT(XOR(B, NOT(AND(A, A)))))))

wec01
Member
Member
Posts: 220
Joined: February 22nd, 2019, 4:02 pm
Division: Grad
State: VA
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by wec01 » April 16th, 2019, 12:26 pm

UTF-8 U+6211 U+662F wrote:Simplify the following logical expression in terms of only AND and OR: XOR(A, XOR(B, AND(NOT(OR(A, B)), NOT(XOR(B, NOT(AND(A, A)))))))
OR(AND(NOT(A), B), AND(B, NOT(A)))
2019 Division C Nationals Medals:
4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1523
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA
Has thanked: 0
Been thanked: 1 time

Re: Circuit Lab B/C

Post by UTF-8 U+6211 U+662F » April 16th, 2019, 5:05 pm

wec01 wrote:
UTF-8 U+6211 U+662F wrote:Simplify the following logical expression in terms of only AND and OR: XOR(A, XOR(B, AND(NOT(OR(A, B)), NOT(XOR(B, NOT(AND(A, A)))))))
OR(AND(NOT(A), B), AND(B, NOT(A)))
Oops, I forgot to specify you could use NOT too. Looks right, your turn!

wec01
Member
Member
Posts: 220
Joined: February 22nd, 2019, 4:02 pm
Division: Grad
State: VA
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by wec01 » April 16th, 2019, 5:17 pm

Image
Suppose you find an LED whose datasheet contains the above graph. What value resistor should you put in series with this LED and a 5V power source in order to have a current of 20 mA going through the circuit.
2019 Division C Nationals Medals:
4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

User avatar
krasabnk
Member
Member
Posts: 32
Joined: March 4th, 2018, 10:08 am
Division: Grad
State: NC
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by krasabnk » April 16th, 2019, 5:50 pm

wec01 wrote:Image
Suppose you find an LED whose datasheet contains the above graph. What value resistor should you put in series with this LED and a 5V power source in order to have a current of 20 mA going through the circuit.
Is it 175 ohms?
DaVinci's Dragons 2019, NCSU '23
[b]2019: [/b]
regionals/states
 <3 Herpetology: 1/3
 :evil: Circuit Lab 5/15
 :?: Experimental Design -/19

[b]2018: [/b]
regionals/ states
<3 Herpetology: 1/4
 :?: Disease Detectives: 4/19

wec01
Member
Member
Posts: 220
Joined: February 22nd, 2019, 4:02 pm
Division: Grad
State: VA
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by wec01 » April 16th, 2019, 6:13 pm

krasabnk wrote:
wec01 wrote:Image
Suppose you find an LED whose datasheet contains the above graph. What value resistor should you put in series with this LED and a 5V power source in order to have a current of 20 mA going through the circuit.
Is it 175 ohms?
Not quite, but I see what you did:
The voltage values on the graph give the voltage drop across the LED; you need to calculate the voltage drop across the resistor before you can use Ohm's law to find it's value.
2019 Division C Nationals Medals:
4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

User avatar
krasabnk
Member
Member
Posts: 32
Joined: March 4th, 2018, 10:08 am
Division: Grad
State: NC
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by krasabnk » April 16th, 2019, 7:00 pm

wec01 wrote:
krasabnk wrote:
wec01 wrote:Image
Suppose you find an LED whose datasheet contains the above graph. What value resistor should you put in series with this LED and a 5V power source in order to have a current of 20 mA going through the circuit.
Is it 175 ohms?
Not quite, but I see what you did:
The voltage values on the graph give the voltage drop across the LED; you need to calculate the voltage drop across the resistor before you can use Ohm's law to find it's value.
Oh, so is it 75 ohms?
DaVinci's Dragons 2019, NCSU '23
[b]2019: [/b]
regionals/states
 <3 Herpetology: 1/3
 :evil: Circuit Lab 5/15
 :?: Experimental Design -/19

[b]2018: [/b]
regionals/ states
<3 Herpetology: 1/4
 :?: Disease Detectives: 4/19

wec01
Member
Member
Posts: 220
Joined: February 22nd, 2019, 4:02 pm
Division: Grad
State: VA
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by wec01 » April 16th, 2019, 7:02 pm

krasabnk wrote:
wec01 wrote:
krasabnk wrote:
Is it 175 ohms?
Not quite, but I see what you did:
The voltage values on the graph give the voltage drop across the LED; you need to calculate the voltage drop across the resistor before you can use Ohm's law to find it's value.
Oh, so is it 75 ohms?
Yep, your turn
2019 Division C Nationals Medals:
4th place Fossils
5th place Sounds of Music
2nd place Thermodynamics

User avatar
krasabnk
Member
Member
Posts: 32
Joined: March 4th, 2018, 10:08 am
Division: Grad
State: NC
Has thanked: 0
Been thanked: 0

Re: Circuit Lab B/C

Post by krasabnk » April 16th, 2019, 7:44 pm

Explain the mathematical difference between the Product of Sums and the Sum of Products procedures of Boolean expressions
Think variables and complements
DaVinci's Dragons 2019, NCSU '23
[b]2019: [/b]
regionals/states
 <3 Herpetology: 1/3
 :evil: Circuit Lab 5/15
 :?: Experimental Design -/19

[b]2018: [/b]
regionals/ states
<3 Herpetology: 1/4
 :?: Disease Detectives: 4/19

Post Reply

Return to “2019 Question Marathons”

Who is online

Users browsing this forum: No registered users and 3 guests