Hey guys, I think its finally time I admit defeat and asked for help...
Basically I'm after a circuit that will convert a mute signal from a Parrot in-car bluetooth system into a 1 second pulse that I can feed into a pre-existing interface that converts resistive buttons on a car steering wheel into keyboard presses to be fed into a computer.
The Parrot bluetooth system has a mute line consisting of a switched ground, which is normally disconnected and becomes grounded when it requests the stereo to mute.
What I believe I need is some form of edge detection circuit capable of converting this mute signal (ranging in length from seconds to minutes) to a 1 second or so pulse at the beginning and end of it that can be used to mimic a keypress on a computer keyboard. (ie Play / Pause).
Mute signal ____|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|______
Req. Output ____|¯¯|________________|¯¯|___
What I'm looking for is some assistance with the edge detector, I've scoured the internet looking for solutions and have tried recreating them but seems I'm unable to get anything that works at all! (Probably due to my total ignorance when it comes to digital circuits!)
Basically I'm after a circuit that will convert a mute signal from a Parrot in-car bluetooth system into a 1 second pulse that I can feed into a pre-existing interface that converts resistive buttons on a car steering wheel into keyboard presses to be fed into a computer.
The Parrot bluetooth system has a mute line consisting of a switched ground, which is normally disconnected and becomes grounded when it requests the stereo to mute.
What I believe I need is some form of edge detection circuit capable of converting this mute signal (ranging in length from seconds to minutes) to a 1 second or so pulse at the beginning and end of it that can be used to mimic a keypress on a computer keyboard. (ie Play / Pause).
Mute signal ____|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|______
Req. Output ____|¯¯|________________|¯¯|___
What I'm looking for is some assistance with the edge detector, I've scoured the internet looking for solutions and have tried recreating them but seems I'm unable to get anything that works at all! (Probably due to my total ignorance when it comes to digital circuits!)
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