RF Wireless Remote Bell

[Adeel]

Hello,

 

is there anyone in the world tell me how this RF works ?, how can i make my own ?, how can i get the calculation of number of turns of L1 for creating fequnency?

 

I need to know this is urgent.

 

Thank you

[Chester Anderson]

Hi,

 

I would love to tell you about RF but there are already too many circuits and information on this website that I dont have anything new.

Explore circuits, contributions here.

[Adeel]

 

Hello,

 

Thanks for reply, i have read many information but i m unable find how to do calculation of L1 number of turn to make the fequency?

[Savio]

This formula is available.

 

L  = [d² n²] / [18d + 40l]

 

•      –    L  is the inductance in Micro Henries [µH]
•      –    d   is the diameter of the coil in inches.
•      –     l   is the length of the coil specified in inches.
•      –    n   is the number of turns.

 

wysiwyg_imageupload:8206:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

decide the diameter and lenght you wabt for your coil and accordingly calculate the no. of turns.

 

[Adeel]

Hello,

 

Thank you so much for this, one part is left now how i can know that this nth turn of coil will make this MHZ ? like if i want to make a circuit for 200 or 300 meter distance then what calclution i need to perform?

 

Thank you

[Savio]

I don’t understand – ‘circuit for 200 – 300 meter distance’.

 

Is that the lenght of the coil.

 

If its the transmission range that you want, it depends on the power you output. Selecting inductance and capacitance values only decide the frequency that you will be transmitting on.

 

Check out the book – Practical electronics for inventors by Paul Scherz.

Its got the stuff you need to know in designing a RF circuit.

[Author]

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