One Watt Audio Amplifier - RevA
author: Blueberry
2 layer board of 1.50 x 1.25 inches (38.1 x 31.8 mm)
Uploaded:
September 14, 2016
Shared:
September 15, 2016
Total Price:
$9.35
Revised One Watt audio amplifier with a Mini USB port and a IS31AP4991A amplifier. C1 thru C3 are 1uF ceramic caps, C4 is a 100uF electrolytic. R1 thru R3 are 4.7k-ohm resistors. R4 and R5 are 47k-ohm for a gain of 10 (20 dB) on the amplifier. As in the previous one-watt amplifier, a stereo signal from the 3.5mm jack is combined into a mono signal using a simple resistor network. The USB input is only used as a 5-volt power source.
Revised One Watt audio amplifier with a Mini USB port and a IS31AP4991A amplifier. C1 thru C3 are 1uF ceramic caps, C4 is a 100uF electrolytic. R1 thru R3 are 4.7k-ohm resistors. R4 and R5 are 47k-ohm for a gain of 10 (20 dB) on the amplifier. As in the previous one-watt amplifier, a stereo signal from the 3.5mm jack is combined into a mono signal using a simple resistor network. The USB input is only used as a 5-volt power source.
