I could only find a 1/4" stereo chassis mounted socket in our local hi-fi shop and was wondering if this will be ok for mono output as it has more solder tabs?
Also a piezo question, I have a piezo out of a smoke alarm which has 3 wires soldered to it instead of 2, a red wire soldered to the middle pad, a green wire soldered to the outer metal disc, and a third white wire soldered to another area of the middle pad within a conductive track that runs in a T shape. Should I cut the white wire off? I am becomming more and more obsess with making this thing come to life, help!
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Hi just tried your test and its a live piezo also soldered in the other (white) wire to the inner pad. Many many thanks to you all this site is fantastic everyone really helpful.
David Lloyd said:
Hi,
Regarding the piezo - it sounds like a self drive type more info here http://www.murata.com/catalog/p15e6.pdf the extra wire is for making the oscillating siren noise and has no effect on using the disc as a pickup. You could wire up as you suggest but before cutting the extra wire try adding it to the middle pad wire and see if it increases the output.
A quick way to check the piezo is OK is just hold the wires to an electric guitar jackplug linked to an amp and talk into it- careful the wires don't ping off the disc though.
Sounds like you will be generating life pretty soon. David
you can also just wire up the piezo and see if it works before installing it. it is really just a microphone. Plug it all into an amp and tap it, that will let you know if there are any issues.
Regarding the piezo - it sounds like a self drive type more info here http://www.murata.com/catalog/p15e6.pdf the extra wire is for making the oscillating siren noise and has no effect on using the disc as a pickup. You could wire up as you suggest but before cutting the extra wire try adding it to the middle pad wire and see if it increases the output.
A quick way to check the piezo is OK is just hold the wires to an electric guitar jackplug linked to an amp and talk into it- careful the wires don't ping off the disc though.
Sounds like you will be generating life pretty soon.
David
stereo sockets work fine. if you solder the two positive terminals together and the two negative terminals together it is just like a mono one. Don't know about the piezos, sorry!
It'll work fine , but there's only one "positive" for the "tip" , unless you're using a stereo input plug/cord. If you solder any of the others to it ,that will ground it .
stereo sockets work fine. if you solder the two positive terminals together and the two negative terminals together it is just like a mono one. Don't know about the piezos, sorry!
stereo sockets work fine. if you solder the two positive terminals together and the two negative terminals together it is just like a mono one. Don't know about the piezos, sorry!
Replies
David Lloyd said:
Regarding the piezo - it sounds like a self drive type more info here http://www.murata.com/catalog/p15e6.pdf the extra wire is for making the oscillating siren noise and has no effect on using the disc as a pickup. You could wire up as you suggest but before cutting the extra wire try adding it to the middle pad wire and see if it increases the output.
A quick way to check the piezo is OK is just hold the wires to an electric guitar jackplug linked to an amp and talk into it- careful the wires don't ping off the disc though.
Sounds like you will be generating life pretty soon.
David
It'll work fine , but there's only one "positive" for the "tip" , unless you're using a stereo input plug/cord. If you solder any of the others to it ,that will ground it .
Jack anatomy & pics
Fergus Morris said: