>>>>>>> Electronics <<<<<<<<?

Question

Hello,

We have just studies about semiconductors, diodes and transistors.

They have also taught us about NOT OR AND NAND NOR EXOR AND EXNOR gates.

I want to please my teachers by making a small device that is based on the knowledge of what we have studied,
so can any one please tell me whether i have knowledge enough to make a digital calculator or a Frecuency modulated FM Radio ??
IF yes please tell me how do i make it


IF no please suggest some other device that can be made without really putting in a lot of time into it




Thanks in Advance.

Answer 1

Below are a few sites I would recommend to get your feet wet.
Some project I would recommend
1. Encoder or decoder
2. Simple adder
3. DA converter
4. AD converter
5. Combination lock (requires sequential circuit elements)

Finally you can always use your imagination.

Have fun

Answer 2

If you have just been introduced to semiconductors and all, then i think you should make a rectifier. It is used for converting ac signals to dc. It is simple in contruction. You need a transformer, a p-n diode, a capacitor and a resistance as load. Connect one end of the transformer to the p-n diode and the diode to a parallel combination of the capacitor and resistor. Complete the circuit by connecting the other end of the resistor to the free end of the transformer. At an introductory level, this would suffice.

Answer 3

You have just introduction in electronics. FM radio etc are not fitting in your present knowledge base presently. If you want to make, go to an electronics shop they provide circuit diagram along with kit to make it. However, your teacher may not be pleased.

You can make logical gates, AM Demodulator, You can make a battery eliminator, a Fire alarm, etc. They will fit in your present knowledge base. I would suggest battery eliminator.

Use a step down transformer with secondary voltage 12 v. Use diode bridge to ractify the ac. Connect 500 MFD capacitor at output to smoothen the DC.