zachtheterrible
Active Member
Hi all,
I just bought a 900MHZ RX and TX that can transmit an analog signal. I want to modulate the TX with the signal from an electret mic.
The transmitter requires a 1V peak to peak signal. I tried one of the audio amps from a "bug" FM transmitter without realizing this requirement, and I could only hear something on the other end if I blew really hard into the mic. I'm looking for an amplifier that will give me that 1V peak to peak. Would an LM386 do it? Unless I got my calculations wrong (most likely I did) it would only give me a voltage of .2V. The signal from an electret mic is tiny. The operating voltage is 3v.
Any ideas? I know it's painfully obvious :lol:
I just bought a 900MHZ RX and TX that can transmit an analog signal. I want to modulate the TX with the signal from an electret mic.
The transmitter requires a 1V peak to peak signal. I tried one of the audio amps from a "bug" FM transmitter without realizing this requirement, and I could only hear something on the other end if I blew really hard into the mic. I'm looking for an amplifier that will give me that 1V peak to peak. Would an LM386 do it? Unless I got my calculations wrong (most likely I did) it would only give me a voltage of .2V. The signal from an electret mic is tiny. The operating voltage is 3v.
Any ideas? I know it's painfully obvious :lol: