While I am watching this video of GreatScott! **At 3:21 ,

I took up my calculator and calculate the power by using P=(V^2)/R, and the answer is 72W.

- This happens due to the voltage across the Peltier may not be accurately 12V as there's Req=Rpeltier+Rwire, is my statement correct?

- 72W and 32W is totally a huge difference, why?

- So, when to use P=(I^2)R and P=(V^2)/R to calculate power loss?

Thanks in advanced.

Jay]]>

So im realy stuck trying to understand PLL's in terms of the calculations ive been looking at. This is a good example of the type of thing - taken from phase locked loops by Roland Best

OK so the U(t) signal seems to tell me that its a standard sine with a changing "phase"

The example and figure show a linear frequency increase from t=0

I have no idea what delta*w^dot means in the notation. I have never seen this before. it seems to be saying the change of gradient? anyway...

Then I...

Help with Phase locked loops (PLL) what does phase mean here?]]>

I'm a first year EEE student at University Of Sheffield.]]>

The question is:

In an AC circuit the voltage can be described using a sine wave with the equation:

I need to work out

a. the frequency

b. the amplitude

c. the relative phase

I know that the amplitude is 150v so that is (b) taken care of, I am now unsure how to work out the following despite scouring the internet and my reading...

AC circuit voltage can be described using a sine wave with the equation??]]>

i need to find the current in the circuit number 48 it should be 0.6 amps.

can someone explain me how to solve it.

thanks.]]>

I= i(1+ Kcos(C*cos(w1*t)+k(t)))

C=2.63

w1= 1 KHz

k(t)=5-10 radians

Please let me know the sampling rate selection criteria of the DAQ for phae retrieval.

Thanks in advance.]]>

I have a circuit where an LM35 chip yields temperature in a voltage rate proportional to the ambient centigrade value (eg. 20 degrees would be 20mV V). Then, after i found out i had to turn this into a digital signal to be able to display this voltage on a seven segment display, i decided to use ADC0831 and to use it's binary output, i decided to use MAX7219 (includes a decoder for binary...

Translating Analog Signal into Digital and Displaying it With Led's]]>

Understanding Positive and Negative charges]]>

I have the following scenario:

A camera, one 10m long HDMI cable is going out of the camera into a HDMI-Splitter (1 to 4).

What I want to ask is wheter it is possible to add another 5m HDMI cable after the Splitter with another HDMI-Splitter 1 to 4 at the end of the 5m cable? Like the image attached.

Is this possible? What are the consequences regarding quality?

Thank you.]]>

I know that if...

[BASIC] How to interpret this circuit (including diodes), need detail explanation]]>

The project is schematically as follows :

Sensing Unit -> CONTROL UNIT -> Heating and Cooling Functions....

Term Project - Air Conditioner (of Some Sort.) - any aid is welcome.]]>

Before i post what i need help with, i'll leave my skype if anyone would be kind enough to help me 1 on 1 please do

Skype: Live:mahdi.rajabi_2

Im having some problems figuring how to make this logic circuit.

This is the problem:

https://gyazo.com/1e4e58b73e6ec4881f1b8f1c6682cf66

I think i've figured out the truth table, but maybe wrong.

View attachment 30788 (uploaded by mod)]]>

1) Selector switch SS101 to P2 (rail 101)

2) Momentary Button PB102 (rail 102) pushed and held for 10 seconds to activate on delay relay TD106 (rail 106)

CR 103 is normally closed so I want to keep it in shelf state and current should flow to AH105, sounding the alarm...

Trying to get alarm horn to sound]]>