who likes math?

[hevnsnt]

10 = 1.4 / (R1 + 200000) × .47

 

[YOyoYOhowsDAjello]

I don't like math...

Are you just trying to solve for "R1"?

 

[hevnsnt]

yes

 

[BigJ]

Is that a multiplication symbol?

 

[YOyoYOhowsDAjello]

Ti-89 says R1 = -199999.9342

 

[Legendary]

The order of operations in that line is ambiguous.
is it
10 = 1.4/( (R1+200000) *.47)
or
10 = (1.4*.47)/(R1+200000)

 

[YOyoYOhowsDAjello]

Originally posted by: Legendary
The order of operations in that line is ambiguous.
is it
10 = 1.4/( (R1+200000) *.47)
or
10 = (1.4*.47)/(R1+200000)

bottom = my first answer,

top = - 199999.702128

EDIT: whoops, had them switched before

 

[artikk]

Originally posted by: YOyoYOhowsDAjello
Ti-89 says R1 = -199999.9342

that what I got
you multiply 10 times 1.4 then divide by .47 and subtract 200000
I like math

russianpower

 

[otispunkmeyer]

i dont mind math at all, its quite enjoyable when a) you understand what just happend and b) you work out a mahoosive equation and u get it right

you couldnt do that without asking on here? that was simple

 

[archcommus]

Originally posted by: Legendary
The order of operations in that line is ambiguous.
is it
10 = 1.4/( (R1+200000) *.47)
or
10 = (1.4*.47)/(R1+200000)

Wtf? That second one is not an option. It's either what you listed first, or do them all in order.

Edit: n/m, wasn't thinking.

 

[YOyoYOhowsDAjello]

Originally posted by: archcommus

Originally posted by: Legendary
The order of operations in that line is ambiguous.
is it
10 = 1.4/( (R1+200000) *.47)
or
10 = (1.4*.47)/(R1+200000)

Wtf? That second one is not an option. It's either what you listed first, or do them all in order.

doing it in order is equivalent to that one

 

[hevnsnt]

10 =

1.4
-----------------------------
(R1 + 2R2) × C1

R2 = 100K
C1 = .47

I am trying to figure out the value of the R1 resistor is..

 

[wobbuffet]

im lost.....

 

[ActuaryTm]

Originally posted by: russianpower
I like math

You'll want to review your work from this thread, then.

 

[YOyoYOhowsDAjello]

ok, answer is - 199999.702128 then

 

[archcommus]

Originally posted by: YOyoYOhowsDAjello

Originally posted by: archcommus

Originally posted by: Legendary
The order of operations in that line is ambiguous.
is it
10 = 1.4/( (R1+200000) *.47)
or
10 = (1.4*.47)/(R1+200000)

Wtf? That second one is not an option. It's either what you listed first, or do them all in order.

doing it in order is equivalent to that one

Right, I was just hasty.

 

[YOyoYOhowsDAjello]

wait... can you have a negative resistance? wtf?

 

[artikk]

Originally posted by: ActuaryTm

Originally posted by: russianpower
I like math

You'll want to review your work from this thread, then.

 

[hevnsnt]

Here is the equation.

F =

1.4
-----------------------------
(R1 + 2R2) × C1

I want my F= 10
R2=100k
C1=.47


See this link "555/556 Astable" I want a 10Hz timer.

 

[ActuaryTm]

Originally posted by: russianpower

By review, I did mean "review, and learn from your mistake".

That may have been unclear.

 

[artikk]

Originally posted by: ActuaryTm

Originally posted by: russianpower

By review, I did mean "review, and learn from your mistake".

That may have been unclear.

(14.2 X 2.5 X 3)X 19.3=2055.45

 

[nycxandy]

R1 = 42

 

[YOyoYOhowsDAjello]

Do you want T = 10 or F = 10?

if T= 10, then R1 = 98062.5931446

 

[intogamer]

:shocked:

 

[hevnsnt]

Originally posted by: YOyoYOhowsDAjello
Do you want T = 10 or F = 10?

if T= 10, then R1 = 98062.5931446

I want F =10