At the risk of just talking to myself here is the summary of some input from the German forum microcontroller.net:
I’d connect it like this:
|DAI Connector TRS Connector
GND ----------------------------------- SLEEVE (ground)
VCC - leave unconnected
OUT ---------------------±-[ 1 K ]---- RING (right channel)
±-[ 1 K ]---- TIP (left channel)
To have it documented here, the pinout of DAI according to
| GND VCC OUT
+--+ | | +-+
) ( | | ) (
| | | | | |
Re: Was ist das für ein Stecker?
|| Autor: Zulde Z. ([zulde_z](http://www.mikrocontroller.net/user/show/zulde_z))
Datum: 18.03.2015 17:53
I think that this would work for cables from a device (e.g. mobile
phone) to a 3pin euro port.
However, since the Roger X actually needs its power to work and generate
an output, I can’t leave the center pin unconnected. Rather I am
thinking to connect GRD and center to a hearing aid battery, GRD to the
2nd ring, --some older TSSR’s have GRD at the sleeve, but modern ones
apparently use it for the microphone of the headset according to a wiki,
– and OUT to top and 1st ring.
What are those --[1K]-- in your scheme? Resistors? Those will work to
attenuate the signal from a mobile phone to my hearing aids. However,
the Soundgate 3 expects a mobile phone level, while it will be getting a
microphone level. So I am likely to have the reverse problem of
amplifying the signal. Can I simply put a battery between OUT and top to
So my main problems are:
- Will the Roger X be able to handle the battery or is it too much
- How can I amplify the signal if needed?
- Is it correct that the GRD is minus and center is positive voltage?