The mic input on uBit
has a pull up bias resistor, so connect you cap + side going
into uBitX.? The low frequency response of you mic circuit
will be affected by smaller capacitors because of the low
value pullup.? Try 10uf?? Look at uBit schematic at HF
Signals.
See what they got in
there?? This keeps the DC off the output of you Mic Amp
circuit.
73's
Mike, WA6ISP
On 1/29/2018 9:59 AM, jlco001 via
Groups.Io wrote:
I am wiring up the
Adafruit AGC Electret Microphone Amplifier - MAX9814 for use with
the uBITX and wonder if I need to put a capacitor at the audio
output. I found a web site that says "Connect the OUT pin to a
1uF-100uF capacitor (really any value will do). If the capacitor
is polarized, connect the OUT pin to the positive side".
Any info appreciated!
Jeff
AD6RH
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
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