Help network cct design

[Luqman Ahmad]

Please help me to learn cct design

 

[droseman]

You are going to have to be *much* more specific than that. Use google to do some research, buy a book - I found that 'The Art of electronics', Horowitz and Hill is a good starter.

Then come back and ask more specific questions

--dave

 

[Luqman Ahmad]

Thanks for your help, these books gives you info about electronic devices but i need to know how to calculate the values of different passive elements according to the required power

 

[droseman]

I see....

Then you will need Ohm's Law (the most essential relationship in electronics), and Thevinin's Theorems will also send you on your way.

--dave

 

[krishna1234]

Kirchhoff's current law (KCL) and Kirchhoff's voltage law (KVL) will help you.if you have the circuit i can help you to solve it.

 

[syeda amna]

you must have powerful knowledge about circuit theorem. there are some network related theorem that you have to learn. for example nodal analysis, mesh analysis, nortan theorem etc.

 

[hitman1988]

hi all
you also need to know about circuit transient , mutual inductance , two port networks , and the most important control theory to learn how to control your cct.

 

[Luqman Ahmad]

solve this

 

[amnandu]

Does this work ??? i had a look at the data sheet for CMOS 4001 and that says pin 14 must b having input voltage of around 3 to 15... if am wrong please dnt mind... Let me know that answer


Good example mate

 

[Luqman Ahmad]

yes this works and pin 14 has 12 volts

 

[Luqman Ahmad]

please solve it

 

[jony130]

Here you have situation when every think is OK.
The Door is close

So when door is close Q3 and Q4 are ON and relay Ry2 is ON to.

And now when someone open the door the situation will look like this.

So we have High state on output of a first gate.
The red LED is ON.
HIGH state begins the process of charging the capacitor C3, so Q1 stay "ON" (buzzer is also ON) until C3 is fully charged. After that Q1/buzzer is off.
At the same time C4 is charging through R6, R7.
And when C4 charge to 0.5Vdd the output of a 3 gate gos to LOW state. And this will causes Q2 to ON and Ry1 also ON. So buzzer and Siren will be ON to.
The LOW state on output of a third gate will off Q3, Q4 (there will be some delay thanks to C6).
And LOW state on output off a fourth gate will locks the circuit in this state.
Until the door is close and reset button is press.