Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [trs]

22 questions
9
votes
3 answers

Can an electrolytic capacitor withstand 0.1 V reverse polarity?

Let’s start the question with a brief description of my application. I am trying to attach a headphone jack with a detect pin to a RDA5807 IC based FM radio project. I am using a separate microcontroller (ATmega8) to detect the insertion of…
aditya444
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8
votes
3 answers

±12V protection for MIDI output

TLDR; how to make a MIDI output withstand shorting it to \$\pm12\$V? I'm designing a MIDI output in a eurorack modular synth module on a TRS jack (this is a semi-standard non-standard way to save space), where it's quite possible for the user to…
Timo
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5
votes
2 answers

±12V protection for MIDI input

TLDR; how to make a MIDI input withstand shorting to \$\pm12V\$? This is a counterpart to this question, I'm asking this as I was inspired by the great answer I got there. I'm designing a MIDI input in a eurorack modular synth module on a TRS jack…
Timo
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3
votes
2 answers

Why would credit card reader over audio jack not work on some devices?

This isn't a troubleshooting question, it's purely to satisfy my curiosity... MagTek makes a product called the uDynamo credit card reader that uses the audio channel on android devices as a communication bus to interface with the mobile devices.…
James M. Lay
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2
votes
0 answers

Use TRS jack as Mono + 5V power input

I'm trying to change this guitar wireless transmitter so that the audio input jack also becomes a charging/power source. The charger will be a separate box with "stereo" input socket. Currently the mono jack (see OUT/GND pin) gets Mono audio from…
nuclear X
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2
votes
1 answer

Connecting cell phone and computer audio through TRS and TRRS 3.5 mm audio jacks

I am trying to connect the computer audio output to the cell phone audio input and vice versa. There are two connection designs because I need to be able to connect both to a desktop and a laptop which feature different audio interfaces. Regarding…
J Physics FM
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2
votes
0 answers

How to connect 5 colored wire headphone to 3.5 TRS jack?

I have a somictone headphone and I want to repair its headphone jack, It contains five colored wires. Here are the wire and TRS jack. Please give me a feedback Can you please tell me how to wire this? I really appreciate your help.
Isuru Abey
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2
votes
0 answers

Why is 3.5 mm audio jack so long (about 19 mm)?

The designers of 3.5 mm audio jack made the decision to keep it's length long (about 19 mm). They could have easily gone shorter lengths. Does longer length provide some noticeable improvements? From what I see on Wikipedia, people have tried to do…
Ashish Ranjan
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2
votes
3 answers

TRS female jack symbol in Kicad

There is a device which is powered and also outputs signal by its TRS connector as shown below: This TRS connector needs a female correspondent for my circuit. I made a small board and need to add my schematics the female jack of this TRS. In…
user16307
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1
vote
1 answer

TRRS headphone and mic swapper

I'd like to create a serial cable link library between two devices called Playdates. They have a TRRS audio jack, and my idea is to use a few cables as shown below to connect each Playdate's audio out into the other's microphone in, allowing for a…
dwb
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1
vote
1 answer

Outputting a 1/4 inch TRS male plug from a PCB

I am designing a small PCB that I need to plug into a 1/4" TRS receptacle. The overall setup can either be something like a small dongle (i.e. attaching a male TRS directly to the PCB somehow,) or I can use an approximately 1-2 foot long cable. I…
philly_g
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1
vote
2 answers

How to detect if a TRS cable is connected to a MP3 player output?

Imagine I have a MP3 player and one male-to-male TRS cable that could be connected or not to the output of that MP3 player on END1. By having a multimeter on the other end END2 of the cable, how could I detect if the cable is connected there or…
Elektrik
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1
vote
1 answer

Why do faulty headphones make MP3s sound low bitrate when I touch the wire?

I have a pair of headphones which came with my phone. They're the standard type that comes with a mobile phone - TRSS 3.5mm jack with an inline microphone. I was listening to Spotify on my phone. I must have yanked the cable too hard one time and…
TCassa
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0
votes
0 answers

How should I wire a passive audio splitter for studio monitors?

I am building a passive audio splitter that takes in two balanced mono signals (on TRS) from an audio interface and then it should be able to switch the routing of the signal using a DPDT switch. I think the main function should work in my current…
Keijo Kunnari
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0
votes
1 answer

TRS to USB microphone wiring

I am trying to use a microphone pulled out from an old video recorder. I can use a TRS connector and plug it into the AV - mic in jack. I am curious if there is a way to use USB - A interface. In short is possible to map Out and GND to USB-A…
NAM
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1
2