PAM 8403 is a portable 3 watts stereo class d amplifier that uses only 5 volts D.C. to operate. The amplifier board is easy to wiring and very small size, you can make a small amplifier project that not requires high voltages to work.
- PAM 8403 cannot bridge together because the amplifier is already bridge-tie-load output configuration
- Over 6 volts can damage the amplifier module, if you want higher power you can check 10 watts class d amp PAM 8610 here
- You must use shield wire connect from input source to volume control and from volume control to the amplifier board input if you don't want your amplifier to suffer from parasitic oscillation (sound like JeeeeJeeee)
Today I will show you how to wire PAM 8403 board amp that easy to understand. Let's see image below.
You can see that two speakers do not share output ground like normal amplifier because PAM 8403 is a bridge-tie-load amplifier, if each speaker wire touches each other the amplifier IC will shut down or damage. You also check that the right speaker + connects to R + sign from amplifier board and speaker - must connect to R - and check left speaker wiring too if you reverse speaker polarity you loudspeaker may produce less bass.
Vcc sign is positive polarity (+)
GND is ground or negative polarity (-)
The amplifier inputs use same ground from signal source you can see how to connect volume control to amplifier here http://www.easyandworkproject.xyz/2016/07/how-to-connect-amplifier-to-volume.html
PAM 8403 board amplifier use 5 volts but need 1.5 amp for good sound so beware that you do not play loud music if you use computer USB power supply because the computer USB socket can supply 500 - 1000 mAh. you can see PAM 8403 sound test here
Enjoy your electronic hobby!!!