Re: Tiny Toy Receiver
Since the Li-Po battery pack of correct size is not easy to find, I modified the circuit a little bit to be compatible with rechargeable Ni-MH battery of 8.4 volt. The amber LED is used to decrease supply voltage about 1.8V. The overall current of about 6mA will be good for the LED, and it also can be used for power supply polarization protection. I also found 300 ohm will not be good for his radio since 1uf will filter too much higher side of audio spectrum. I also found the iPhone headset has impedance a bit more than 40 ohm and it is good for higher gain in this circuit.toggle quoted message. . .
If I may, I would call it inline receiver or TTR (Tiny Toy Receiver). The reason for inline is that it is actually connected between antenna cable and headphone cable.
在 2018年10月15日，下午1:23，Adam Rong <rongxh@...> 写道：