using the amp without the pi powered, using the amp on the same power pack but nothing else powered on --- 0 or near 0 noise. using the amp with the pi powered , but the audio input wires not attached yielded 0 or near 0 noise. using the amp without the resistor or the capacitor , but attached to e...

Read mfa298's answer again, especially the second paragraph. You may be able to suppress the noise with small capacitors (10nF or 100nF) across the supply at either the Pi end of its supply cable, or at the amplifier itself, or both. It needs experimentation to find the right values and places. It ...

using the amp without the pi powered, using the amp on the same power pack but nothing else powered on --- 0 or near 0 noise. using the amp with the pi powered , but the audio input wires not attached yielded 0 or near 0 noise. using the amp without the resistor or the capacitor , but attached to e...

it's not coming off the GPIO , it's coming from the main leads from the power bank , and the reason for the capacitor and resistor is the power bank could not supply the 5 volts ~1.13 amp power to charge the capacitor on top of everything else running on the pi , including the LCD panel and usb wif...

it's not coming off the GPIO , it's coming from the main leads from the power bank , and the reason for the capacitor and resistor is the power bank could not supply the 5 volts ~1.13 amp power to charge the capacitor on top of everything else running on the pi , including the LCD panel and usb wifi...

I am working on a project with a GPIO 10 button board , a 2.4 inch SPI TFT, and a 1+1 watt (stereo, 1 watt per channel) amplifier, powered by a 37 watt hour 2.1amp battery pack. I have all of this attached to a raspberry pi 2 , but I am getting interference in the amplified audio , which sounds like...