richfiddler11
- Date Joined:Apr 29, 2010
- Instructables:1
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» It won't hurt to try with those values, but you might be happier with the mixer and a h…
» What you want to do is exactly the use case this mixer was designed for. You just need …
» By putting a diode in line with the signal, you are literally clipping it (everything b…
» Self powered lav mics would work fine. For volume control see circuit in FAQ section, s…
» No. Please read the FAQ section, step 15 for the details.
» Nice! I particularly like the 'Hello Kitty' motif ;^) Thanks for sharing the picture.Rich
» 1 kOhm would still be fine. You typically want the impedance of the source (mixer outpu…
» In order to run headphones, you'd have to go lower than 500 ohms. Most headphones have …
» 1) Regarding the LED -- Yes, in theory this could be done but I don't see the point. …
» Yes, no problem. Just don't tie L & R channels together without the resistors in between.
» What you want to do is exactly the use case this mixer was designed for. You just need …
» By putting a diode in line with the signal, you are literally clipping it (everything b…
» Self powered lav mics would work fine. For volume control see circuit in FAQ section, s…
» No. Please read the FAQ section, step 15 for the details.
» Nice! I particularly like the 'Hello Kitty' motif ;^) Thanks for sharing the picture.Rich
» 1 kOhm would still be fine. You typically want the impedance of the source (mixer outpu…
» In order to run headphones, you'd have to go lower than 500 ohms. Most headphones have …
» 1) Regarding the LED -- Yes, in theory this could be done but I don't see the point. …
» Yes, no problem. Just don't tie L & R channels together without the resistors in between.
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Jul 11, 2011. 6:49 PMponchato
says:
Hey Rich, thanks for the mixer instructable. I have a question though: I have a mono input I want to convert to stereo, so it'll come out of both speakers instead of just one. In the altoids tin, could I add an SPDT switch before the resistors on one of the inputs to copy the mono input to both left and right speakers, or would that mess up the other inputs?
It might be better to run an SPST switch between the L and R channels of one input, but *after* the resistors.
With the switch open, you will have a normal stereo input. With the switch closed, the mono signal will be fed to the L and R output mix.
The way you were thinking about would work too, but if you plug a stereo input in while the switch is in mono mode, the stereo output won't be too happy.
With the switch open, you will have a normal stereo input. With the switch closed, the mono signal will be fed to the L and R output mix.
The way you were thinking about would work too, but if you plug a stereo input in while the switch is in mono mode, the stereo output won't be too happy.
Jul 13, 2011. 12:12 AMponchato
says:
Thanks for the reply!
I was thinking the switch would mess up a stereo input if it's closed, but if the switch is added -after- the resistors, won't it copy all of the left channels (inputs 1, 2, 3, and 4) to the right and vice versa? Please don't get me wrong, I'm definitely not an expert, I just want to maintain stereo separation for all of the other inputs *and* copy the one mono input to stereo.
I was thinking the switch would mess up a stereo input if it's closed, but if the switch is added -after- the resistors, won't it copy all of the left channels (inputs 1, 2, 3, and 4) to the right and vice versa? Please don't get me wrong, I'm definitely not an expert, I just want to maintain stereo separation for all of the other inputs *and* copy the one mono input to stereo.
Hmmm... now that I think about it, you are absolutely correct, the scheme I suggested will make the whole output mono because it will tie the L and R output mixes together.
I have to think most stereo devices can tolerate having their L and R channels tied directly together (I know you're talking about mono sources, but have to look at the worst case).
If this is the case, then the SPST (e.g. simple open/close switch) between L and R channel before the resistors like you suggest would work fine.
To be totally safe, you could do something like this with the input:
>--R---+----R--> to mix right
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SPST Switch
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>--R---+----R-> to mix left
But again, this might be overkill.
Good catch!
Rich
I have to think most stereo devices can tolerate having their L and R channels tied directly together (I know you're talking about mono sources, but have to look at the worst case).
If this is the case, then the SPST (e.g. simple open/close switch) between L and R channel before the resistors like you suggest would work fine.
To be totally safe, you could do something like this with the input:
>--R---+----R--> to mix right
|
SPST Switch
|
>--R---+----R-> to mix left
But again, this might be overkill.
Good catch!
Rich
Hi,
Please read the FAQ on the last page instructable, there is also a lot of discussion on that very question in the comments below as well. If after reading that you still have a question, please let me know.
Rich
Please read the FAQ on the last page instructable, there is also a lot of discussion on that very question in the comments below as well. If after reading that you still have a question, please let me know.
Rich
Sep 11, 2010. 10:28 AMsnowdenth
says:
I'm new to all this but I need to know- why are the resistors in the circuit? I see that they make a connection to the output, but you could also use wire for that. There is another reason- what is it? Is it that it cuts down on interference? Thanks for taking time to comment.
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