| Electronics > Beginners |
| Need help turning old payphone into dial-an-mp3 display |
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| skarecrow:
--- Quote from: Towger on September 03, 2017, 06:06:39 pm ---There is no need to connect to a PABX. The guts of the phone can be scrapped. The pi has stereo audio out, just a matter of connecting it up to a cheap 8ohm speaker in the handset etc. --- End quote --- The guts CAN be scrapped, but everything is already there to have a working keypad, so it saves a lot of work by just keeping it there. I wasn't suggesting connecting the phone to an actual pbx through the wires, I was talking about the pi running a software solution with a menu system similar to the existing pbx software packages available. The software can turn the dtmf tones it receives through the pi's audio input and navigate the system, just as if you had dialed into a real pbx. Are handset speakers 8ohm? For some reason I thought they were 32. Sent from my XT1565 using Tapatalk |
| ez24:
--- Quote from: skarecrow on September 03, 2017, 01:21:58 pm ---Someone else mentioned using bluetooth to control the playlist. Please explain how (and more importantly WHY) that should be considered. I've been trying to think of any reason to use bluetooth at all and I'm coming up blank. --- End quote --- The owner of the phone could customize what happens when someone uses the phone. Custom messages or clips could be played for different people. A doctor could give a message to their client before they see them. |
| ez24:
I suggest the OP start a Kickstarter on this. He could request help on this forum to start it. I like this one. |
| skarecrow:
--- Quote from: ez24 on September 03, 2017, 11:28:19 pm --- --- Quote from: skarecrow on September 03, 2017, 01:21:58 pm ---Someone else mentioned using bluetooth to control the playlist. Please explain how (and more importantly WHY) that should be considered. I've been trying to think of any reason to use bluetooth at all and I'm coming up blank. --- End quote --- The owner of the phone could customize what happens when someone uses the phone. Custom messages or clips could be played for different people. A doctor could give a message to their client before they see them. --- End quote --- But that's already the reason for using the existing key pad. What would be the point of adding bluetooth? I see no reason to use it. The OP also stated they liked the idea of keeping the natural feel of the phone which pretty much rules out doing anything that I can imagine with bluetooth. Also the OP is a self proclaimed 'non electronics person'. Suggesting the use of bluetooth adds a lot of complexity to a very easy solution. Sent from my XT1565 using Tapatalk |
| Beamin:
--- Quote from: skarecrow on September 03, 2017, 07:13:34 pm --- --- Quote from: Towger on September 03, 2017, 06:06:39 pm ---There is no need to connect to a PABX. The guts of the phone can be scrapped. The pi has stereo audio out, just a matter of connecting it up to a cheap 8ohm speaker in the handset etc. --- End quote --- The guts CAN be scrapped, but everything is already there to have a working keypad, so it saves a lot of work by just keeping it there. I wasn't suggesting connecting the phone to an actual pbx through the wires, I was talking about the pi running a software solution with a menu system similar to the existing pbx software packages available. The software can turn the dtmf tones it receives through the pi's audio input and navigate the system, just as if you had dialed into a real pbx. Are handset speakers 8ohm? For some reason I thought they were 32. Sent from my XT1565 using Tapatalk --- End quote --- You realize the key pad doesn't put out the tones right? Also the key pad is hooked up in a matrix where pressing a button doesn't just switch on a wire it makes combinations which have to be sorted out. I don't know where the pi would have separate audio out and audio in jacks that you could just plug into. It has one jack that's shared with something else like composite video. Accessing this might require a program through python. I found personally it was much easier to use the Arduino and C compiler to do things then the pi. Plus I think C is more useful if you are going to spend your effort and time. I have a feeling you are at that stage in the hobby where you have learned a little and everything seems doable and easy. The next phase is finding out that things are much more complex then you thought and you realize that you have to focus on one area to excel at because there are only so many hours in a day and to figure out everything would take more then a four year degree. I had a guy working for me that was like this. The result was all kinds of stuff taken apart not put back together and a whole bunch of never to be finished projects. He would be super enthusiastic at first but then he would get to a hurdle and say fuck it this shits not going to work and give up. |
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