Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Multivibrator

Status
Not open for further replies.

dramrattan

New Member
Hi,

I attached a diagram of a multivibrator that generates beep tones for verification of a pin code. The pin code is entered by the calling party wishing to access an electrical device via a controller attached to the called party's telephone. The multivibrator for example will generate a single long beep tone if the pin code is correct and 3 short beep tones if the pin code is wrong.

I don't know what type of multivibrator is used here eg. if it is a astable, monostable or bistable. Which one is it and how do you know which it is?...I tried comparing the diagram to the standard configurations given for the astable, monostable and bistable from wikipedia after reading about each one but still don't know which type of multivibrator it is.
 

Attachments

  • Multivibrator.jpg
    Multivibrator.jpg
    176.3 KB · Views: 156

ericgibbs

Well-Known Member
Most Helpful Member
Hi,

I attached a diagram of a multivibrator that generates beep tones for verification of a pin code. The pin code is entered by the calling party wishing to access an electrical device via a controller attached to the called party's telephone. The multivibrator for example will generate a single long beep tone if the pin code is correct and 3 short beep tones if the pin code is wrong.

I don't know what type of multivibrator is used here eg. if it is a astable, monostable or bistable. Which one is it and how do you know which it is?...I tried comparing the diagram to the standard configurations given for the astable, monostable and bistable from wikipedia after reading about each one but still don't know which type of multivibrator it is.

hi,
A multivibrator is an astable, it generates a squarewave output on pin3, while the RESET pin4 is high.
 
Last edited:

Mikebits

Well-Known Member
Of course you meant the above shown multivibrator is an astable, as multivibes come in several flavors:)
 
Status
Not open for further replies.

Latest threads

Top