I want to be able to use the headphone out of my Mac to input into an ISD 1820 voice record chip.
The attached schematic, it shows the normal setup of the chip, using an elect microphone.
I understand that the mic has a very small peak to peak, so I will obviously have to use resistor dividers to attenuate the output from the computer, but the output from the computer will be +/- around the ground line, so how can I centre it to be able to feed it into the ISD1820.
The attached schematic, it shows the normal setup of the chip, using an elect microphone.
I understand that the mic has a very small peak to peak, so I will obviously have to use resistor dividers to attenuate the output from the computer, but the output from the computer will be +/- around the ground line, so how can I centre it to be able to feed it into the ISD1820.
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