Hello everyone
First I need to say that althou I have always been interested in electronics, I am not anywhere near beeing an electro-engineer. I know the basics and not really much more on the subject, but Ive always been prone to thinkering.
I was clearing out some old junk from my closet when i found an old car phoning gadget, that you clip on over your mobile phones speaker and it picks up the sound via a condenser microphone and sends it out on 88,7 MHz and 106,4 MHz, which you can then catch with your car radio.
Since the rise of bluetooth this device has become rather obsolete, so it was just lying in my storage for the last 10 or so years. Now before i decide on throwing it away, I was thinking on possible alternative uses.
If i could get it to take the sound from my laptop and feed it to my HiFi via radiowaves it could live on as somthing usefull and I could stop having to deal with the extra cable that i currently use.
So, the gadget is powered by a CR2032 battery, which meens 3V of power. Now I would like to power it via usb, so I need to drop the usb power line for 2V. I was thinking resistors, since the device probably has a constant drain. Not really sure there.
The second bit that I need to do is feed it the audio. The easiest way would be to use a single headphone that could be cliped to the gadget, so the microphone would do the work, but i was thinking if there are any alternatives. Ive opened it and saw it uses the xf-18d condenser mic,
I was kinda hoping i could just solder it off and instead of it solder on a connector that i could plug into my headphones jack.
So the esencial bit is how to drop the voltage from 5V to 3V, but if anyone knows if(/how) it would be possible to take out the mic and wire sound directly into the device, that would really be the cherry on top.
Possible?
First I need to say that althou I have always been interested in electronics, I am not anywhere near beeing an electro-engineer. I know the basics and not really much more on the subject, but Ive always been prone to thinkering.
I was clearing out some old junk from my closet when i found an old car phoning gadget, that you clip on over your mobile phones speaker and it picks up the sound via a condenser microphone and sends it out on 88,7 MHz and 106,4 MHz, which you can then catch with your car radio.
Since the rise of bluetooth this device has become rather obsolete, so it was just lying in my storage for the last 10 or so years. Now before i decide on throwing it away, I was thinking on possible alternative uses.
If i could get it to take the sound from my laptop and feed it to my HiFi via radiowaves it could live on as somthing usefull and I could stop having to deal with the extra cable that i currently use.
So, the gadget is powered by a CR2032 battery, which meens 3V of power. Now I would like to power it via usb, so I need to drop the usb power line for 2V. I was thinking resistors, since the device probably has a constant drain. Not really sure there.
The second bit that I need to do is feed it the audio. The easiest way would be to use a single headphone that could be cliped to the gadget, so the microphone would do the work, but i was thinking if there are any alternatives. Ive opened it and saw it uses the xf-18d condenser mic,
I was kinda hoping i could just solder it off and instead of it solder on a connector that i could plug into my headphones jack.
So the esencial bit is how to drop the voltage from 5V to 3V, but if anyone knows if(/how) it would be possible to take out the mic and wire sound directly into the device, that would really be the cherry on top.
Possible?