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Do the SPK + and – pins on the Adafruit FONA 3G+GPS Breakout have DC blocking capacitors ?

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Do the SPK + and – pins on the Adafruit FONA 3G+GPS Breakout have DC blocking capacitors ?

(a) Yes

(b) No

This question was addressed to me in homework.

Query is from Adafruit FONA 3G+GPS Breakout topic in chapter Interfacing of Sensors, Actuators, and Other Modules of Arduino

1 Answer

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The correct answer is (a) Yes

To explain: The SPK + and – pins on the  Adafruit FONA 3G+GPS Breakout are used to connect to any 8 Ohm speakers, the two pins are differential so they do not need to be connected to any DC blocking capacitors, however they should not be used to connect to any stereo powered speakers.

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