Hi,
I need to build a device for my uncle (musician) that allows him to play music (from cd player, tapes etc.) through the phone so his customers can have a quick idea about the work being made.
I know emails or internet would be easier but he can't use it.
Anyone with ideas ? schematics ?
Thank you very much.
I need to build a device for my uncle (musician) that allows him to play music (from cd player, tapes etc.) through the phone so his customers can have a quick idea about the work being made.
I know emails or internet would be easier but he can't use it.
Anyone with ideas ? schematics ?
Thank you very much.
If you like DIY, this site might be usefull.
http://www.tkk.fi/Misc/Electronics/circuits/teleinterface.html
Otherwise, there are also other commercial devices that give you line inputs to the phone line.
http://www.tkk.fi/Misc/Electronics/circuits/teleinterface.html
Otherwise, there are also other commercial devices that give you line inputs to the phone line.
Thank you,
Thanks. In my case, quality isn't an issue. The goal is to give the customer a "preview" of the project progress so he can give his impressions in real-time.
Uhhhh... I'm not sure here in Canada but I suppose it's "legal". Maybe that could explain why phone companies are selling "line" insurances in case something blow up between your phone and the telco.
As some says : you're allowed to do anything as long as you don't get caught. Anyway, your point deserves investigation. Thank you.
Keep in mind the inherent limitations of the phone system, namely the bandwidth, which goes from about 300 Hz to 3500 Hz (the sampling rate is 8 kHz).
Thanks. In my case, quality isn't an issue. The goal is to give the customer a "preview" of the project progress so he can give his impressions in real-time.
I don't know what it's like over there, but in the UK it's illegal to connect an unapproved device to the phone line.
Uhhhh... I'm not sure here in Canada but I suppose it's "legal". Maybe that could explain why phone companies are selling "line" insurances in case something blow up between your phone and the telco.
As some says : you're allowed to do anything as long as you don't get caught. Anyway, your point deserves investigation. Thank you.
What you are looking for is a telephone audio coupler.
Here's one. Google for others.
http://www.testequipmentdepot.com/skutch/tacoupler/t21p.htm
Check with them to make sure it's usable in Canada.
Here's one. Google for others.
http://www.testequipmentdepot.com/skutch/tacoupler/t21p.htm
Check with them to make sure it's usable in Canada.
Thanks !
I found the following schematic and it would be nice if you could give me your comments about it.
http://home.maine.rr.com/randylinscott/jul98.htm
If I want to be able to speak at the same time as the music plays, can I simply remove R1 ?
Thank you
I found the following schematic and it would be nice if you could give me your comments about it.
http://home.maine.rr.com/randylinscott/jul98.htm
If I want to be able to speak at the same time as the music plays, can I simply remove R1 ?
Thank you
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Elkaid said:Thanks !
I found the following schematic and it would be nice if you could give me your comments about it.
http://home.maine.rr.com/randylinscott/jul98.htm
If I want to be able to speak at the same time as the music plays, can I simply remove R1 ?
Thank you![]()
The circuit looks goo. You might want to see if the CD player has an earphone jack and volume control or not. Normal RCA outputs don't handle 600 ohm impedance well, and you might want to adjust vlume.
If you plug this circuit along with the phone, you would be able to talk while you play when the switch is on.
Most CD outputs like at least 10K. If the CD player has a remote controlled volume, you might just at a buffer. I'm not really sure whether a potentiometer will work or not because I normally don't deal with tranformers in the signal path.
Normally the CD manual would specify what kind of load the RCA output interface requirements are.
Normally the CD manual would specify what kind of load the RCA output interface requirements are.
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