debouncing and "short circult resume"

[johnn]

I am connecting a switch, a spdt manual toggle switch, as a remote start
switch of a disc player. I was wondering is there any simple circuit
that can do both debouncing and "short circuit resume" ? "short circuit
resume" is if the switch (or the wire) happens to be faulty and
short-ciruit, my circuit could ignore the fault and give a open input to
the disc player, and prevent shorting the input of the player for long
time. Is there already an IC for such purpose ? Many thanks in advance.

 

[Luhan Monat]

johnn wrote:

I am connecting a switch, a spdt manual toggle switch, as a remote start
switch of a disc player. I was wondering is there any simple circuit
that can do both debouncing and "short circuit resume" ? "short circuit
resume" is if the switch (or the wire) happens to be faulty and
short-ciruit, my circuit could ignore the fault and give a open input to
the disc player, and prevent shorting the input of the player for long
time. Is there already an IC for such purpose ? Many thanks in advance.

Hi,

PIC12F629 - and a bit of software.

--
Luhan Monat (luhanis 'at' yahoo 'dot' com)
"The future is not what it used to be..."
http://members.cox.net/berniekm

 

[legg]

On Tue, 25 Jan 2005 22:13:05 +0800, johnn <johnjohn9191@hotmail.com>
wrote:

I am connecting a switch, a spdt manual toggle switch, as a remote start
switch of a disc player. I was wondering is there any simple circuit
that can do both debouncing and "short circuit resume" ? "short circuit
resume" is if the switch (or the wire) happens to be faulty and
short-ciruit, my circuit could ignore the fault and give a open input to
the disc player, and prevent shorting the input of the player for long
time. Is there already an IC for such purpose ? Many thanks in advance.

You only need to debounce if a repeated stroke gives misbehaviour.

You have two positions - start and stop, niether of which will bounce
when it's opposite is called for. if capacitively coupled, a failure
in either could be over-riden simply by the disc ending, or being
ejected.

RL

 

[Rolavine]

Subject: Re: debouncing and "short circult resume"
From: Luhan Monat x@y.z
Date: 1/25/05 10:14 AM Pacific Standard Time
Message-id: <V7vJd.555$Jt.190@fed1read02

johnn wrote:
I am connecting a switch, a spdt manual toggle switch, as a remote start
switch of a disc player. I was wondering is there any simple circuit
that can do both debouncing and "short circuit resume" ? "short circuit
resume" is if the switch (or the wire) happens to be faulty and
short-ciruit, my circuit could ignore the fault and give a open input to
the disc player, and prevent shorting the input of the player for long
time. Is there already an IC for such purpose ? Many thanks in advance.

Hi,

PIC12F629 - and a bit of software.

I would guess the disk player has a pull up or pull down resistor on this line?

If so why not use a capacitor connected in series with the switch to the
opposite logic pole.

If the player was designed to be used with a switch then the debouncing should
have been put in there?

Anyway, if advice is useless do the honorable thing and torch it!

Rocky



the switch to the other side.