Designing an Electronic Timer Circuit Using NE555 IC or BC548 Transistor

[pmostafa]

Dear

I would like to design a simple electronic timer circuit by other NE555 IC or BC548 Transistor. I’ve got a circuit but it doesn’t work. Would you please me in this regard?

Appreciate, if you would get back to me with tested circuit diagram at your best possible time.

Regards

Pervez

 

[berkeman]

Dear

I would like to design a simple electronic timer circuit by other NE555 IC or BC548 Transistor. I’ve got a circuit but it doesn’t work. Would you please me in this regard?

Appreciate, if you would get back to me with tested circuit diagram at your best possible time.

Regards

Pervez

Can you post your schematic and a picture of your breadboard?

 

[thankz]

you'll need at least 2 transistors to get a waveform, I don't think it can be done with one transistor and you said timer (aka counter), you can't make that with the parts your describing.

 

[jim hardy]

?

NE555 is the ubiquitous Signetics timer IC ,

Introduced in 1971 by American company Signetics, the 555 is still in widespread use due to its ease of use, low price, and stability. It is now made by many companies in the original bipolar and also in low-power CMOS types. As of 2003, it was estimated that 1 billion units are manufactured every year.[1]

http://en.wikipedia.org/wiki/555_timer_IC

Plenty of information here to help you figure out why your circuit doesn't work.
http://my.ece.ucsb.edu/York/Bobsclass/2C/Tutorials/App%20notes/555an.pdf

as Berkeman said, post a drawing of what you tried...

 

[thankz]

the 555 produces pulses or waveforms, my mistake I saw the word timer and thought of counter. don't mind me I'm stupid today