hello
i need to do a lab project using transistors..

i'm looking for ideas what can i make.. i dont want to many components..
lets say about 5-15

if you can help me with the design also it will be great
thank you

 

Hello,

What should the circuit do?
Take a look in the lonks of theis page to get some idea what to do with a BJT.
http://www.educypedia.be/electronics/composemiconductors.htm

Greetings,
Bertus

 

A simple but practical audio amp comes to mind, but that is just the beginning.

You can make with two transistors...

A power supply.
An electronic load (to test power supplys).
An audio amp.
An RF transmitter (be aware of the laws in your country concerning this).
A simple siren
Two blinky lights, either LEDs or light bulbs.
An SCR.


Schematics I don't have anymore include a chirping bird or a cricket.

The 300 in 1 electronics kits are good for ideas like this.

 

at first i thought about doing a "light burn notifier"
but it was to hard for me to make it on pspice

so now i though maybe to do an 4 RLC lines
with a led in paralel to each trnasistor
than sweap the frequency
and in 1k,3k,5k,7k each led will turn

the transistor will be like an current amp that way the resistors could be small and the B.W will be also very small

do you think my idea will work ?

do you have any other ideas ?
thank you

 

That would work. Think Wien Bridge filters, and you have a simple light organ.

It'll take more than a few transistors, but you can get packs pretty cheap, even from Radio Shack.

 

i get what i need for free from my uni..

why would i need more then one ?

 

on the left is a current amp
how can i connect them so that peak on the resistors will grow ?

thank you