TSA1020 is a digital stereo Bluetooth/Single-ended audio volume controller board. It has an RCA audio input/output ports and a BVC port (only for some Bluetooth amplifier boards). You can use it to control audio volume any normal amplifier board. The audio out signal will increase/decrease when the user rotates the knob, Bluetooth audio volume control port will also increase/decrease audio signal. TSA1020 external volume control board Pins define: Port name Pin name Direction Description BVC Bluetooth volume control 5V - GND - INC Digital Out Bluetooth audio volume + DEC Digital Out Bluetooth audio volume - SEL Digital In Bluetooth/Single-ended select 1-Bluetooth, 0-Single-ended select Features: Size: 8.1cm x 3.8cm Bluetooth audio volume control Singal-ended audio volume control An external audio volume knob Working voltage: DC 8V-39V
