Headset amplifier via USB
Headset amplifier via USB circuit is a series that is used to add a gain on the headset, which is used on a computer headset. Indeed not only on a computer course in all the headset could also, but in the above circuit voltage to utilize voltage mensupply issued on a PC or laptop via USB. So you need not bother looking for supply voltage, you just take it from USB. Part List : Resistor R1 = 20K R2 = 10K R3 = 10K Capacitor C1 = 3u3F 50V C2 = 100pF Diode D1 = 1N4148 D2 = 1N4148 D3 = 1N4148 D4 = 1N4148 IC U1 = JRC4558 Connector X1 1 = Output 2 = Input 3 = Ground Connector X2 1 = V+ 5V from USB 2 = Ground From USB PCB design Views