Need Help! A circuit that will produce only 1 pulse - Electronic Circuits Projects Diagrams Free

menirva · 11th April 2008, 07:24 AM

Hello.. anyone can help me? I'm trying to design a circuit that will only produce a SINGLE PULSE with T_HIGH period.

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Or.. how can i make a 74HC390 to reset forever when it reach 0010 state? Because i just need the pulse from 0001 state. In other word, i just need 1 short pulse. This pulse will not be triggered by any other signal.

Abeer_engjbr · 11th April 2008, 11:56 AM

You can use LM555 timer in Monostable mode to produce one pulse.
See
http://home.cogeco.ca/~rpaisley4/LM555.html#2

http://publico.ing.ues.edu.sv/asigna...20Tutorial.htm

Hope that will help.

jpanhalt · 11th April 2008, 01:43 PM

This will produce a single pulse. Its main purpose is a debouncer. It does not give a secondary pulse when the switch opens or is kept closed. Pulse duration is set by C2/R2.

John

menirva · 15th April 2008, 12:19 AM

Thanx! The switch can be any oscillator? Can you help me, i tried on p-spice, but i may have done something wrong here?

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Centretek · 15th April 2008, 04:04 PM

What's wrong with a thyristor?

jpanhalt · 15th April 2008, 05:10 PM

Quote:

Originally Posted by Centretek

What's wrong with a thyristor?

How do you turn it off, if the current is still flowing? You could use a GTO device, but then you still have a circuit about as complicated as the other options.

John

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11th April 2008, 07:24 AM	(permalink)
menirva	Need Help! A circuit that will produce only 1 pulse Hello.. anyone can help me? I'm trying to design a circuit that will only produce a SINGLE PULSE with T_HIGH period. untitled.JPG Or.. how can i make a 74HC390 to reset forever when it reach 0010 state? Because i just need the pulse from 0001 state. In other word, i just need 1 short pulse. This pulse will not be triggered by any other signal. Last edited by menirva; 14th April 2008 at 01:41 PM.

11th April 2008, 11:56 AM	(permalink)
Abeer_engjbr	You can use LM555 timer in Monostable mode to produce one pulse. See http://home.cogeco.ca/~rpaisley4/LM555.html#2 http://publico.ing.ues.edu.sv/asigna...20Tutorial.htm Hope that will help.

15th April 2008, 12:19 AM	(permalink)
menirva	Thanx! The switch can be any oscillator? Can you help me, i tried on p-spice, but i may have done something wrong here? forum1.JPG forum.JPG Last edited by menirva; 15th April 2008 at 12:59 AM.

15th April 2008, 04:04 PM	(permalink)
Centretek	What's wrong with a thyristor? __________________ A conclusion, is the point reached when you stop thinking.