As an assignment for an Electronics course, I need to implement a Schmitt Trigger using the LM311 comparator. However, I have no idea on how to connect both the transistor pins and the positive feedback resistor for the circuit to work.

Thanks in advance for your answers.

Alex

View attachment 32729

View attachment 32730]]>

Automatic Street Light using LDR Project ( Need someone's assistance)]]>

Complete novice to electronics here, and I was wondering if I could get some help. I'm trying to rig up a dc motor to a 9v battery and use a potentiometer to adjust its speed. I thought I calculated proper resistances, but so far I've either had a motor that didn't move, or pots that caught on fire. I measured the motor as drawing 62 miliamps, with of course 9v in the circuit, when there is no resistance.

Any help would be appreciated!]]>

- Relative permittivity: 8

- thickness of: 0.02cm

- Plates of 6cm2

I have got for the equation:

C= A/d x ER E0

C = 6 x 10*4 / 0.02 x 10*-2 x 8 x 8.85 x 10*-12 = The answer I am getting is 2.124 x 10*-14

Where am I going wrong?? Thanks for any help ]]>

Please, I really cannot get how to do it View attachment 32488]]>

I have to find the current through 10-ohm resistor using the method. Any help appreciated...

Thevenin equivalent circuit]]>

On the pictures, one is the problem and another is a solution in a solution manual. I'm curious why Vsb = Vin = 0.2, since Vin is across the source and ground, but Vsb is across the source and bulk (substrate).

Thank You

BlackMelon]]>

I have this assignment for a Diploma I am studying and I'm a little stumped. I feel like the method to working it out is right in front of my face but for some reason I can't see it. Here is what it says in the assignment:

------------

The Radio system will be powered by a D.C. Power Supply, with built-in Back-Up Battery facility. The Power supply is rated at 13.8 V, 25A 100% Duty Cycle.

The Radio System consumes 650 mA when quiescent; 1.75 A when receiving, and 7.75 A when...

Calculating Battery Usage]]>

Could you please help me out on how to connect the following circuit on a breadboard, I'd really appreciate some video links which can help me understand how to interpret the questions and understand the logic behind connecting this circuits.

I'm new here so I'm not even sure if this types of questions are allowed....Anyways, Here's the experiment:

"

Demonstrate how to manually operate a serial display that uses two seven segment displays with decoders, latch and a shift...

Two seven segment displays]]>

Regards]]>

I am feeding its INPUT from +15Vdc through an ammeter. With a 1K resistor the...

LM334 Constant Current Source]]>

I was wondering how can I change the fully depleted soi code in silvaco to have a finfet

thank you]]>

Thanks in advance.]]>

If water is available and gas is available the system should continue operation and if otherwise the system should short down so as not to damage the rotating machine .

Very urgent pls]]>

Can someone give me an electrical schema or any advice?

Thanks.]]>

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]]>

if i have the inductance value (example: 2.2 nH), how do I get the below:

1. Diameter of core

2. length of core

3. number of turns

4. wire size/ gauge...

calculate number of turns and length for inductor]]>

Does anyone know? IC2a is an amplifier and IC2b, IC2c and IC2d are comperators.

Another circuit has an IR transmitter that will transmit against an object...it wil be received by D2--> that signal will be detected by D4, C4 (peakdetector)

the output voltage from the amplifier will be proportional to the distance from...

Car park sensor --> need help with component functions]]>

Could somebody please confirm for me that I have my assignment answers correct?

The boolean expression is at the right hand side at the final gate.

Thanks

thanks View attachment 30480]]>

C B A

0 1 0

1 0 1

0 1 1

1 1 0

PLS HELP ]]>

RCRL equivalent]]>

The amp works in general but after few minutes it starts to raise and produces buzzles and creaks.

Is this a problem with filtering?

It works with two condenser cartriges. Schematic below:]]>

I have tried the circuit as attached to this post. View attachment 30252 I got the answer as 11.945mHenry.

However the answer given in the book is 4mH. I totally don't know how they got that.

Also I am unable to solve complicated circuits that they mention as to be done in Electronics Workbench. That's a bummer because I can't seem to solve the more complicated questions by hand.

Also is learning through textbooks the best way to go about learning electronics(I am in chapter...

Need help with homework]]>

on the bottom right, the equation for V is the integral of the (green) current thru V2, summed over a Δt of 22u seconds, divided by 22u. So the current thru the resistor (the top trace) is supposed...

LTspice: plotting the integral of a waveform]]>