Wires for Amplifier

The PAM8302 is wired directly to the pins on the Adafruit Feather M4.

3-wire ribbon cable (or 3 separate wires) length: 3 inches

Single ground wire: 1.25 inches. If you built the keypad earlier using a chunk of ribbon cable, one of the spare bits of wire from that is perfect here.

Solder Wires to Amplifier

Make the following wired connections. Use the short single wire to connect Pin A– to the GND pin. The 3-wire ribbon cable connects to pins A+, VIN and GND. SD (shutdown) is left unconnected.

Notice two wires share the amplifier’s single GND connection: one to A–, one to the Feather cable.

Soldered Amp Wires

Double check the wires are properly soldered to the PAM8302. Especially that two-wired ground connection. A cold solder joint there will cause unexpected noises.

2-pin JST Cable for Amp

A 2-pin JST cable is used to connect the speaker to the audio output. Red wire connects to positive pin ⊕ and black wire connects to negative pin .

2-pin JST socket cable: 2 inches.

Wired Amplifier

Double check the wires and cable are properly soldered to the PAM8302.

This guide was first published on Nov 09, 2021. It was last updated on May 27, 2024.

This page (Wiring Amplifier) was last updated on Mar 08, 2024.

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