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Soldering 3.5 mm TRS cable to amplifier with +, - and OUT as output

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martinsson93

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Hi!
I want to solder a TRS cable to a circuit amplifyer.
The amplifyer has +, - and OUT as outputs. I have heard that it should be possible to use a 3.5 mm TRS cable but I'm wondering to what output I should solder the wires from the TRS cable.

Someone told me that I should use either TIP or RING to out and then SLEEVE to -. Is that correct?

I have attach an image of the amplifyer and the TRS cable.

Thank you!
 
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I can't see the pictures, but the normal way of wiring a 3.5mm stereo audio jack is tip=left, centre section=right and larger metal area=ground.

Can you try and post your pictures again.
 
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DPG said:
I can't see the pictures, but the normal way of wiring a 3.5mm stereo audio jack is tip=left, centre section=right and larger metal area=ground.

Can you try and post your pictures again.
Click to expand...
Yes, I tried to post them again.

Where is ground on the amplifier?
 

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  • [ElectriciansForums.net] Soldering 3.5 mm TRS cable to amplifier with +, - and OUT as output
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  • [ElectriciansForums.net] Soldering 3.5 mm TRS cable to amplifier with +, - and OUT as output
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Looks like the writing on the PCB is in Chinese. Ebay purchase?

Can you tell me the markings on the 8 pin amplifier chip and we can probably work out which pin of the connector is ground.
 
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DPG said:
Looks like the writing on the PCB is in Chinese. Ebay purchase?

Can you tell me the markings on the 8 pin amplifier chip and we can probably work out which pin of the connector is ground.
Click to expand...

Thank you!

Here are some more pictures where you might see it better. They are +, - och OUT. It's bought from a electronic webpage, not Ebay. It's called EK022 amplifyer.
I just want to make sure that I solder the TRS wires correct onto the amplifier.
 

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  • [ElectriciansForums.net] Soldering 3.5 mm TRS cable to amplifier with +, - and OUT as output
    mikrofonförstärkare3.PNG
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  • [ElectriciansForums.net] Soldering 3.5 mm TRS cable to amplifier with +, - and OUT as output
    mikrofonförstärkare4.PNG
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Thanks.

'+' goes to the positive of your 5 volt power supply.

'-' goes to the 0V/ground of your power supply

'Out' is the audio output (you will also need to connect the '-' pin)
 
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DPG said:
Thanks.

'+' goes to the positive of your 5 volt power supply.

'-' goes to the 0V/ground of your power supply

'Out' is the audio output (you will also need to connect the '-' pin)
Click to expand...

yes thank you! But the TRS have three wires, so that's why I'm confused. The manufactor told me that I could connect the amplifier to the TRS cable but which wire goes to where? She said that the TIP or RING should be solder to the "OUT" and the SLEEVE to ground. But then there's one wire that isn't connected ....

Maybe just me that don't get it at all. Thank you so much for your help!
 
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What are you connecting this microphone module to?

You are using a 3 pole jack plug, which is generally used for stereo audio. However there is nothing to stop you just using the sleeve and tip connections for this mono (single channel) application.

And what power supply are you using to power it?
 
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DPG said:
What are you connecting this microphone module to?

You are using a 3 pole jack plug, which is generally used for stereo audio. However there is nothing to stop you just using the sleeve and tip connections.

And what power supply are you using to power it?
Click to expand...

To another circuit board, a DSP, which has a TRS cable as input. I think the DSP is supposed to be used for stereo audio, but I would like to connect it to two microphones with amplifyers.

Can I just leave the ring connection and not connect it to anything? Would I get mono sound then?

Is there any way to get stereo sound from a setup and connection like this?

I'm not sure about the power supply yet, probably I would use a portable power bank that I can charge and use. Otherwise a battery.
 
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martinsson93 said:
To another circuit board, a DSP, which has a TRS cable as input. I think the DSP is supposed to be used for stereo audio, but I would like to connect it to two microphones with amplifyers.

Can I just leave the ring connection and not connect it to anything? Would I get mono sound then?

Is there any way to get stereo sound from a setup and connection like this?

I'm not sure about the power supply yet, probably I would use a portable power bank that I can charge and use. Otherwise a battery.
Click to expand...

You would need to know the connection details of your DSP board. But I would guess tip=left, ring=right, sleeve=ground if they are following convention.

I would think you could connect one microphone module to the left input of the DSP board and one to the right.
 
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DPG said:
You would need to know the connection details of your DSP board. But I would guess tip=left, ring=right, sleeve=ground if they are following convention.

I would think you could connect one microphone module to the left input of the DSP board and one to the right.
Click to expand...
okay, do you mean that I can connect one microphone with its amplifyer to the right wire of the TRS and then the other microphone and amplifyer to the left wire of the TRS? And then I connect the sleeve to ground? Would that work?
 
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martinsson93 said:
okay, do you mean that I can connect one microphone with its amplifyer to the right wire of the TRS and then the other microphone and amplifyer to the left wire of the TRS? And then I connect the sleeve to ground? Would that work?
Click to expand...

Can't say for definite without seeing it, but I suspect so. Try it with one channel first to keep things simple.

Does your DSP also need a 5VDC supply?
 
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martinsson93 said:
okay, that's a great recommendation!

No it needs 6V AC to DC supply. It's called ADAU1467Z from analog devices if you are interested.
Click to expand...

The 1st page of the data sheet is misleading. It looks like it actually needs a 5 to 7VDC supply.

What are you going to use the DSP for out of interest?
 
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