Eaton Viking SRC-7495 meets iPod

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Chuckmeter

Member (SA)
A few more pictures...

I had to find another way to mount the ipod remote switches as my "button PCB" wouldn't fit on a complete tape chassis. After making a functional (but flaky) prototype with tact switches I bought more appropriate push button switches and built a new switch mount.

Here's the prototype : IMG_0067_buttons_proto.jpg

The new version : IMG_0002.jpgIMG_0003.jpg

The new attachment mounted to the chassis : IMG_0008_buttons_mounted_bottom.jpgIMG_0009_buttons_mounted_front.jpg

I made a "breakout" board for the remote control pcb. On top is the audio output jack, the green screw block on the left is the input from the ipod trrs jack. The cord was hardwired to the circuit board but it broke twice while working with the thing and soldering on smt is a pita hence the screw block. On the right is a 6 pin header with the top 4 pins going to the buttons and the bottom 2 pins is the ground connection going through the function relay : if function switch is on TAPE, the circuit opens and the ipod stops responding to button presses. Conversely, the same relay disconnects the circuit to the leaf switch in the middle (with the red wires) so the tape player responds only when TAPE is selected. IMG_0032_remote_breakout_board.jpg

Made a very simple driver circuit for the function beause connecting it directly would draw too much currentIMG_0005_relay_driver.jpg

I installed my relays between the two circuit boards. There are convient "grooves" in the chassis where they sit perfectly. I took this picture before removing the dial cord in order to reinstall it properly, but you can see where the relays are... IMG_0011_relays.jpg

Here's an insertion point for the AUX input : IMG_0012_aux_input.jpg

The 9-pin header that connects both circuit boards is useful too. Here's the pins I identified. The other pins are most likely line output and preamp ouptut.

1 (pink) : tape (play) (R) <-- if you'd rather use the TAPE input instead of AUX for internal use, this is where to connect.
2 (red) : +12V power <-- This is the main power bus.
3 (white) : tape (play) (L) <--
4 (orange): tape +12V --> Goes +12V when function is on TAPE to power up the tape preamp.
6 (black) : GND
IMG_0036_bus.jpg

As I was screwing back the rear cover, the wall charger detached from it so I redid the power supply / charger from scratch, in a cleaner fashion and most importantly better glue. The iPod battery being old has limited autonomy, a full charge lasts for about 3 hours. I I find it to affect my usage habits I may insert a rechargeable "power bank" in line with the charger some time in the future.
IMG_0037_power.jpg

So that's about it, I hope this can be helpful or inspire others...
 

ranter2887

New Member
:w00t: :thumbsup: That is amazing and impressive. I have a Type B USB port too which I believe is very reliable. perfect to sync/charge your idevice. And I see that you placed a charger in the boombox. That's awesome.

I have a lot of learning to do with powerbanks. I had the same thought of using Li-ion batteries and a regulator to power my boombox. But then I worry about finding the right charger for it.

I don't know if it's a good idea to my boombox's transformer for lighter weight and install a female DC connector and find a power adapter with the right voltage and amperes. So much to think about overall. :hmmm:

You blew my mind when I saw you placed an actual cassette in the deck and it still works with the same butons. Genius! Question. How did you switch between apps without even going to home screen? Is your ipod jailbroken with custom button actions using Activator?
 

Chuckmeter

Member (SA)
ranter2887 said:
:w00t: :thumbsup: That is amazing and impressive. I have a Type B USB port too which I believe is very reliable. perfect to sync/charge your idevice. And I see that you placed a charger in the boombox. That's awesome.

I have a lot of learning to do with powerbanks. I had the same thought of using Li-ion batteries and a regulator to power my boombox. But then I worry about finding the right charger for it.

I don't know if it's a good idea to my boombox's transformer for lighter weight and install a female DC connector and find a power adapter with the right voltage and amperes. So much to think about overall. :hmmm:

You blew my mind when I saw you placed an actual cassette in the deck and it still works with the same butons. Genius! Question. How did you switch between apps without even going to home screen? Is your ipod jailbroken with custom button actions using Activator?
You're right it is jailbroken and i got my preferred apps starting with activator actions mapped to the home - or record - button. Long press for alarm clock, double press for DeliTape (audio player mimicking a cassette) and triple press starts TuneIn radio.

Jailbreaking allows for much more tweaks, such as sharing a folder through Windows and scheduling a task to play whatever music file you'd copy in said folder - FLAC as well. And you can rotate the springboard...

https://vimeo.com/252061742
 

Chuckmeter

Member (SA)
More work done on this one...

A new cassette / iPod door similar to the one I made for the Viking - simpler here because the iPod is permanently attached.
IMG_0272.JPG

Two new USB jacks.
A-type to attach a storage device
B-type to connect to a computer as a USB audio device (sound card mode)
IMG_0268.JPG

Last but no least, I got hold of a new pushbutton set and built yet a 4th version of tape keys button board. It tests out OK.

The double pole switches will allow for selective operation of either the iPod or the BT / mp3 board - or of course the cassette player itself. Triple-purposed transport keys !!
IMG_0266.JPG
IMG_0267.JPG
 
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