audioguru Posted April 10, 2007 Report Share Posted April 10, 2007 These are regular alkalines by the way. I will be using AAA lithiums in the final version because I need to bring the amperage somewhat back up as I replaced the 3 AA for these 3 AAA's. I wonder what effect those will have.AAA cells will produce exactly the same current to your circuit as AA cells except they are smaller and won't last as long.Lithium keeps the voltage higher, longer than alkaline.I have a pristine FRS model of the one I hacked for the communicator, so I used this for the breadboard. I did exactly as you indicated. I took one of those "earbuds" and put into the headphone jack, cut the earpiece end of it off, stripped the wires, ran one to ground and the other to the breadboard as indicated and found that there is no sound coming through the speaker (I used a second FRS and created sound to be able to hear of course). I can hear the other FRS through the earpiece (I have two of those also), but the spliced one is not amplifying through the chip. Other then that, all is working.One wire from the earbuds is the signal and the other wire (pin 3 of its power amplifier) has a DC voltage that must not be connected to ground. Maybe your wires were mixed up. I showed the DC wire with a cut, then the earbud's wire was connected to ground.If you connected pin 3 of the FRS power amplifier to ground then maybe the IC is blown up. Quote Link to comment Share on other sites More sharing options...
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