4 votes

How can I make a L+R+mic audio dongle to record an Android phone's own output?

Don't mess with the capacitor if you have distortion. Here's the "circuit" from your first link: "TIP" and "RING" are the speaker outputs. "RING2" is ground. ...
JRE's user avatar
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2 votes
Accepted

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

They seem to be correctly connected Mic levels are much lower than line levels. Some audio interfaces have selectable gain control to switch between line level input and mic level input, some don't. ...
Justme's user avatar
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2 votes
Accepted

Designing a circuit for TRRS Socket

If the goal is to have phones only (not a headset with microphone), it only needs 3-pin 3.5mm TRS socket, so TRRS is not necessary. Sleeve is ground, Tip is left speaker and Ring is right speaker. ...
Justme's user avatar
  • 148k
2 votes
Accepted

What is this contact on a jack socket schematic?

I would say that terminal 1 is the sleeve, 2 is first ring, 3 is second ring and 4 is tip. 6 is a switch contact normally connected to 4/tip contact when there is no plug inserted. 5 and 7 form an ...
Peter Bennett's user avatar
1 vote

USB audio (TRRS) to transformer for impedance matching

That's a standard feature. If you take any mobile phone headset, it has the hands-free call answer button shorting the Mic wire to Gnd. Your audio transformer has low enough DC impedance so it ...
Justme's user avatar
  • 148k
1 vote

Are all adapters for TRRS to TRS the same?

As you've discovered, there is no standard meaning to each contact in a TRRS connection. Some devices are built to be backwards-compatible with older TRS connections, and as such have ground in ...
Matt S's user avatar
  • 3,512
1 vote

Analog Android headphone command circuit not working together with microphone

Your second diagram is incorrect. You do not need C1, R5, or the battery. Just install the microphone capsule in place of the "Mic" resistor in your first diagram. Watch the polarity. The ...
JRE's user avatar
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1 vote
Accepted

Creating a custom TRRS splitter for headphones and mic; how to handle the mic's TRS jack?

The de facto standard for PC microphone power and audio is commonly called “plug-in power”. You can find some documentation of it using that search term. Sleeve: common Ring: 3-5 V power, current ...
Kevin Reid's user avatar
  • 7,524
1 vote

How to safely use TRRS socket in order to transfer signal

simulate this circuit – Schematic created using CircuitLab Figure 1. A traditional connection. Assuming the socket is on the powered device (rather than on the keyboard) the traditional ...
Transistor's user avatar
  • 176k

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