1. Two channel A/O = send a tone out from the L or R or both channels on the headphone jack.....us a freq to voltage converter at the remote end............. UNTESTED.
2. A/I = use the mic input on the headphone jack, send in a tone from the remote end and do some frequency analysis to convert to a linear level.............UNTESTED
3. D/I = Use the plugged function to provide a free digital input (see my previous post)..........TESTED
All this came about because im using Android 2.3.6 and cannot easily design the remote electronics to be a host mode USB...........wish i chosen a platform with Android 3+ because that would have been easy, a days work BUT iv already bitten the bullet and now have 200+ 2.3.6 devices :-/ .........................maybe i should have researched better.
As my old man used to say "there is always more than one way to crack an egg"
Cheers
Ray
2. A/I = use the mic input on the headphone jack, send in a tone from the remote end and do some frequency analysis to convert to a linear level.............UNTESTED
3. D/I = Use the plugged function to provide a free digital input (see my previous post)..........TESTED
All this came about because im using Android 2.3.6 and cannot easily design the remote electronics to be a host mode USB...........wish i chosen a platform with Android 3+ because that would have been easy, a days work BUT iv already bitten the bullet and now have 200+ 2.3.6 devices :-/ .........................maybe i should have researched better.
As my old man used to say "there is always more than one way to crack an egg"
Cheers
Ray