DIY (relay) Input Selector Kit

tjolle62 · **Posted:** 07 Nov 2009 10:24 am

Hi Guys,
At least this time i don't have a question or anything but i guess i have too much time on my hands
after a long day in my workshop with a total pain in every joint and muscle

After a warm shower and a good dinner i finished my input selector and of course i noticed a thing
in form of 4 LED's that's jumping around when you turn the selector switch "real quite"

with this kit you get a 12" ribbon cable between switch and board just to keep the signals short and
recommended location is at back of amp and of course switch on front :up:

ok no problem,
If switch in front and board at back how in the H**L are you supposed to see those diodes ?
LOL i'll guess i fell of the bus to logic land ,
Well i don't have any problem with it thou i gonna have blue diodes with a nice cable to them and
then at least i have my board in the rear of my amp and indicators in front ,
to quote my self " i just happened to have too much time laying around "
might as well better to post a pic on it,

Regards,
Kjell.

Gio · **Posted:** 07 Nov 2009 11:04 am

hi Kjell, is that another eBay find? Can you post a schema and link?
Thanks, Gio

tjolle62 · **Posted:** 07 Nov 2009 11:24 am

Hi Gio,
Yepp ! that's another flea-bay find

Didn't get an schematic or anything with'it but for $16 incl shipping :up:

Sorry for not posting a link before but here it is,

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0423345668

Regards,
Kjell.

tombethe · **Posted:** 08 Nov 2009 5:36 am

Cool,

nearly the same way like on the "Bax preamp"... (still not ready :bawling:

)

Kjell, could you take a very clear shot from the backside?? With the input to the left side... And if possible - with some light under the board (maglite or something else) to get a "view trough"? I've got any idea...

tjolle62 · **Posted:** 08 Nov 2009 6:01 am

Hej Tom,
Just happy to to any help for a change

too bad that i almost soldered everything on to this board this weekend but is alway's a way so -
this is the best i could come up with in this short notice and if you need a close up or anything just
give me a shout,

Tweaked this a little bit so tracers came up a bit more and the small cap visible is my own "snubber"

Regards,
Kjell.

tjolle62 · **Posted:** 08 Nov 2009 6:03 am

Just a correction to my first post in this thread,
Real Quite !! :eek:

"Real Cute" was it suppose to be.

Regards,
Kjell.

Geek · **Posted:** 08 Nov 2009 8:35 am

You're finding all sorts of wonderful things on fleabay :up:

Cheers!

tjolle62 · **Posted:** 08 Nov 2009 9:17 am

Hi Geek,
always fun to scope around the bay for gadgets

what i looking for now without sucess is a small amp like LM1875 size with a tone control on board
for a few small projects like multimedia amp and other gadget projects.
If you find or see anything in size 2x10-25W with incorporate tone control please let me know,
with "anything" means pcb - drawing - schematic, well" you get the picture,
Regards,
Kjell.

tombethe · **Posted:** 08 Nov 2009 1:15 pm

Great

Tons of thanks, Kjell.

Will post the scheme soon... ;-)

tombethe · **Posted:** 09 Nov 2009 8:27 pm

Hi guys,

i had a little bit time today and i've played around with the board...

That's the result:

Attachment:

Inputselector.GIF

One channel with one relay is shown on this image. It shouldn't be too hard to add some more relays. The connections are the same like on the first pin of the rotary switch. Just add the same to the other switch pins. Each switch pin has his own resistor and transistor. The relays are supplied from the 7812 after the C1 (all in parallel). The 4148, 4k7 and low current leds are the same for all relays... RCAs are for 1 channel (L+R). The transistor could be a 2N5551, BC337, BC107, BC550 or any other NPN with at least ~100mA...

Hope that helps ;-)

DIY (relay) Input Selector Kit

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