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Re: Circuit Lab B/C

Posted: April 15th, 2019, 6:30 pm
by krasabnk
UTF-8 U+6211 U+662F wrote: I love this drawing
8.36 kiloohms?
Thank you, haha!
Looks good, your turn :)

Re: Circuit Lab B/C

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

Re: Circuit Lab B/C

Posted: April 16th, 2019, 12:26 pm
by wec01
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)))

Re: Circuit Lab B/C

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

Re: Circuit Lab B/C

Posted: April 16th, 2019, 5:17 pm
by wec01
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.

Re: Circuit Lab B/C

Posted: April 16th, 2019, 5:50 pm
by krasabnk
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?

Re: Circuit Lab B/C

Posted: April 16th, 2019, 6:13 pm
by wec01
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.

Re: Circuit Lab B/C

Posted: April 16th, 2019, 7:00 pm
by krasabnk
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?

Re: Circuit Lab B/C

Posted: April 16th, 2019, 7:02 pm
by wec01
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

Re: Circuit Lab B/C

Posted: April 16th, 2019, 7:44 pm
by krasabnk
Explain the mathematical difference between the Product of Sums and the Sum of Products procedures of Boolean expressions
Think variables and complements