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Showing posts with label Make By own. Show all posts
Showing posts with label Make By own. Show all posts
Homemade music player
Posted by the InCrediBLe
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Friday, January 7, 2011
, under
Make By own
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Sadly, this pocket mp3 wav player doesn’t come close to the capabilities of even an iPod generation 1 yet, but you have to give [Owen] props for making it in less than 24 hours. The system consists of a Propeller MCU (cleverly wired to be swappable with “shields” similar to Arduino systems), SD card for song storage, and an LM386 for audio. While the setup is a little dull, and only plays through songs non stop with no controls whatsoever, it certainly is a good start in the right direction for a cheap and simple portable music player. Of course some planned changes are in the works, include an accelerometer (gesture based controls?), etched PCB, docking station, and a case. We’re surprised there is no form of screen planned, considering Owen appears to have a rather good handle on touch interfaces;perhaps he’s waiting for revision 3.
Click on the highlighted text for more info.
Vintage car audio gets MP3 input
Posted by the InCrediBLe
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[Nali] is fixing up a 1966 Rambler Ambassador and decided to give the audio a bit of an upgrade. Instead of replacing the head unit he added a connector for audio input. The method he used is simple, inexpensive, and allows the original unit to continue functioning as a radio. He cut the feed wires going to the volume knob and patched in a headphone jack. The jack he used has an internal switch that is meant to switch off a pair of speakers when headphones are plugged in. The jack will allow the original signal from the radio tuner to pass through whenever there isn’t a connector plugged in. It seems like this is easier on older hardware than it is on modern equipment.
This isn’t where his entertainment enhancements stop. [Nali's] working on a 7″ in-dash Linux machine so keep your eye on his thread to see what he comes up with.
Here s the goal ..
Using a modern mp3 player on a vintage radio without paying 100 $ .
We can for 5 $ , in fact 2 $ if you get a free box for this , a soldering iron and a few wires . Notice the commercial
adaptor also need soldering , if they are not FM transmitters . What if you just have mono AM ? :P
If you have to fix something , you d better know how it works ...
So a few basics : It s really basic knowledge , easy to understand for people not familar with electronics , so be indulgents if I explain it quite easily ...
Any car radio , home amplifier or whatever basicelly works the same way . You need a source , to provide a low signal from CD player , radio, 8 track tape or whatever .
Then , you need a power stage , to move the loudspeakers . It s the amplifier .
Mostly all radios have an ampli inside . Not always really powerfull , but there s an amplifier . Usually between 4 or 11 watt in an old stock radio .
Between the source and the amplifier , there s a way to choose how much output ( sound ) you want from the radio . It s the volume button .
This is were we can play ....
A volume button works quite like a rheostat , the same we have to have more or less light in the dash .
The source comes from the top , and bellow is the ground . The middle cursor move between both and is connected to the amplifier .
The shape is just round :P
So if you turn left , you move the cursor to the ground , less sound , if you turn right , you go to full source and have more sound .
Just as easy ....
So ... What now ? Instead of sending to the amplifier the sound comng from the radio, we can send the sound from
anything .
The ugly way would be to cut the wires coming from the source , and solder wires connected to a mp3 player .
For just 2 $ more , we ll give the beast 2 lifes .
Remember the FM receiver you had . Usually the sound comes from the loudspeakers , but when we plug ears , the speakers
stop and there s sound only in the ears .
It s just a mecanical connector . That s what we have to use .
Go to any electronics store parts , and ask for a stereo jack connector ( 1/8 I think ), with a mecanical switch , to choose from head / speakers .
Cut wire on the volume button , inside the radio ,
Test it with your favorite Beckman , Fluke , ohmetre , solder it so that without anything plugged inside the sound comes from the radio , and when you plug a mp3 player , the sound comes from it . It s stupid and easy but it s enough .
In french , but quite easy to understand :
Oh .... Your mp3 player is stereo and your radio is mono .... Connect the right and left throught 120 ohms resistors ,
that s all ( 80 to 220 ohm in fact , to be safe ) .
PRO :
easy.
cheap.
it works .
CONS :
You have to solder inside the radio, this may kill it .
The ground from your volume button may not be the same ground as the radio ground . I STRONGLY recommend not to plug a
USB mp3 player to a USB charger in the lighter , unless you are SURE the ground is the same .
In my Ambassador , it s not the same ground . This could results to dead for the radio, electric fire , or ugly noise
in the loudspeakers .
More : you can plug 2 RCA output after the cursor and add an external amplifier , so you can enjoy classic music on
mono AM with 500 Watt :P
I know it s quite simple , it works for me , but take care to what you do . I m not responsible for anything if you
kill your cat , neighboor , wife , etc ..
I m french , so my english may not be perfect . If anyone wants to correct me , I ll be glad of it .
Phil
For more info on this, follow the thread click here
Using a modern mp3 player on a vintage radio without paying 100 $ .
We can for 5 $ , in fact 2 $ if you get a free box for this , a soldering iron and a few wires . Notice the commercial
adaptor also need soldering , if they are not FM transmitters . What if you just have mono AM ? :P
If you have to fix something , you d better know how it works ...
So a few basics : It s really basic knowledge , easy to understand for people not familar with electronics , so be indulgents if I explain it quite easily ...
Any car radio , home amplifier or whatever basicelly works the same way . You need a source , to provide a low signal from CD player , radio, 8 track tape or whatever .
Then , you need a power stage , to move the loudspeakers . It s the amplifier .
Mostly all radios have an ampli inside . Not always really powerfull , but there s an amplifier . Usually between 4 or 11 watt in an old stock radio .
Between the source and the amplifier , there s a way to choose how much output ( sound ) you want from the radio . It s the volume button .
This is were we can play ....
A volume button works quite like a rheostat , the same we have to have more or less light in the dash .
The source comes from the top , and bellow is the ground . The middle cursor move between both and is connected to the amplifier .
The shape is just round :P
So if you turn left , you move the cursor to the ground , less sound , if you turn right , you go to full source and have more sound .
Just as easy ....
So ... What now ? Instead of sending to the amplifier the sound comng from the radio, we can send the sound from
anything .
The ugly way would be to cut the wires coming from the source , and solder wires connected to a mp3 player .
For just 2 $ more , we ll give the beast 2 lifes .
Remember the FM receiver you had . Usually the sound comes from the loudspeakers , but when we plug ears , the speakers
stop and there s sound only in the ears .
It s just a mecanical connector . That s what we have to use .
Go to any electronics store parts , and ask for a stereo jack connector ( 1/8 I think ), with a mecanical switch , to choose from head / speakers .
Cut wire on the volume button , inside the radio ,
Test it with your favorite Beckman , Fluke , ohmetre , solder it so that without anything plugged inside the sound comes from the radio , and when you plug a mp3 player , the sound comes from it . It s stupid and easy but it s enough .
In french , but quite easy to understand :
Oh .... Your mp3 player is stereo and your radio is mono .... Connect the right and left throught 120 ohms resistors ,
that s all ( 80 to 220 ohm in fact , to be safe ) .
PRO :
easy.
cheap.
it works .
CONS :
You have to solder inside the radio, this may kill it .
The ground from your volume button may not be the same ground as the radio ground . I STRONGLY recommend not to plug a
USB mp3 player to a USB charger in the lighter , unless you are SURE the ground is the same .
In my Ambassador , it s not the same ground . This could results to dead for the radio, electric fire , or ugly noise
in the loudspeakers .
More : you can plug 2 RCA output after the cursor and add an external amplifier , so you can enjoy classic music on
mono AM with 500 Watt :P
I know it s quite simple , it works for me , but take care to what you do . I m not responsible for anything if you
kill your cat , neighboor , wife , etc ..
I m french , so my english may not be perfect . If anyone wants to correct me , I ll be glad of it .
Phil
For more info on this, follow the thread click here
MP3 player barely larger than an SD card
Posted by the InCrediBLe
on , under
Make By own
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If your board fabrication and soldering skills are up to it, you can make your own tiny MP3 player. This rendition is just about half again as large as a standard SD card, whose slot is on the bottom of the board seen above. The heavy lifting is taken care of by a VS1011 MP3 decoder which also has its own stereo headphone driver on-chip. There’s no display and it seems that most of the 4k of program memory on the PIC 18LF88 is being used. Too bad, we’d love to take this to the next level, attaching it to the head unit in a car and spoofing the communications as if this were a CD changer.
This small DIY MP3 Player is much like the Apple Shuffle. Not a simple project since it consists of all tiny surface mount parts. The code for the 18F88 is available for download so you can build your own.
“This player features a shuffle mode, basic track navigation, volume control, FAT32 support, fragmented file support, an unlimited number of files on the root directory, and high quality playback. Files at 256Kbps can be played without a hitch. Variable bitrate files are supported with peaks up to 320Kbps.
WAV files are also supported, but they have to be less than CD quality unless you put a faster oscillator in the pic.”
