[i need help in inductors]

hello all,
i need to make inductor in specific value and i have all math formula but i find difficulty . how i can make any inductor in any value or in any frequency
notice (in my country there are no inductor as me like)
thank you
our regards :)

[Security Alarm system]

Hello everyone.
I am doing my final project for DLD ( Digital Logic Design ). I have to make a security alarm system..the user will input a password, if it matches with the one saved in register,the light will turn on otherwise if both the passwords don't match,it won't turn on.

Kindly someone send me a circuit diagram for it. I need it urgently.

[Voltage Level shifting]

Hello friends,

Initially I have to convert the 24V signal to 5V which I did using voltage divider circuit but now the thing is my input signal level is not decided it may vary from 15V to 24V so the question is how can I maintain 5V.

My input is varying from 15V to 24V but I required 5V output.. how can I do this??????????/
;D

[where is my post]

no problem i will send it agaien and i feel..................... :D

[where is my post]

>:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:(
hi all where is my post i can't find it who is delete it.......................?