Hello all , I need to transmit 2 channel audio signals to speakers in a home theature setup about 15 feet apart.Only power lines are available in the speaker positions (2 rear speakers),the audio signals are to be via a small receiver.Can't put cables from amplifier to rear speakers.The amplifiers are to be inside the speaker boxes.the input audio signals to be received via FM receiver
Available options are using 2 FM transmitters at the DVD player end and 2 receivers at speakers end,but because of poor stability,(W/o any PLL) the signals will tune out,
Any ideas ?
Available options are using 2 FM transmitters at the DVD player end and 2 receivers at speakers end,but because of poor stability,(W/o any PLL) the signals will tune out,
Any ideas ?
Unless you are looking for a project to do, there are existing commercial products that do exactly that.
Thanx ENSO for rply.....Therz no such commercial product here locally here. bUT I do have an AV transmitter, but the sound o/p is mono.
Any project u know ?
Any project u know ?
All you need is two mono transmitters, that have selectable (or tunable) frequency ranges and two receivers 😉
Do you not have a Radio Shack in India?
Do you not have a Radio Shack in India?
What about infra-red?
This would be quite easy to make using an opamp to modulate the light output directly or you could FM modulate it. The receiver could be a photo-transistor etc... There are many circuits available on the web for this setup.
Build two directional units and set them up for line of sight.
Would look cool and be a discussion point too.
Cheers
This would be quite easy to make using an opamp to modulate the light output directly or you could FM modulate it. The receiver could be a photo-transistor etc... There are many circuits available on the web for this setup.
Build two directional units and set them up for line of sight.
Would look cool and be a discussion point too.
Cheers
Quasi!! good of you 4 Very a good suggestion,of using IR...Have to study indepth.
Quality of sound and interference from other light sources are of concern...
I think i have some IR receiver transisters with ambient light filters.
Will move the thread...
Quality of sound and interference from other light sources are of concern...
I think i have some IR receiver transisters with ambient light filters.
Will move the thread...
I have a couple of IR audio link ideas collected from web..
1. Simple Amplitude modulated.
2. FM modulated /demodulated PLL using CD4046.but uses hard to get CA3237E IR amplifier IC rcever end.
Circuit attached:
1. Simple Amplitude modulated.
2. FM modulated /demodulated PLL using CD4046.but uses hard to get CA3237E IR amplifier IC rcever end.
Circuit attached:
Hey sivan_and;
Looks cool. If you don't want to user the LM386 you can take the audio into your own amp. Yo may need an opamp (LM833 etc) if the level isn't high enough.
Cheers
Looks cool. If you don't want to user the LM386 you can take the audio into your own amp. Yo may need an opamp (LM833 etc) if the level isn't high enough.
Cheers
Yeah my amp will be LM3875. Substituting IC CA3237 is another problem that has to be solved.Had to try some amplifier incop in IR receiver.
interesting. anyone got a schematic to send stereo signals into one IR beam?
my goal is sending audio into a single fiber optic cable or even just plain line-of-sight.
my goal is sending audio into a single fiber optic cable or even just plain line-of-sight.
someone mentioned to me in the ESP forum that I have to do a ADC before the IR link then a DAC after it. I can't find any schematics though so I'm still stuck.
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