Introduction:

This DIY Mic Module will amplify the input volume and it can be applied to megaphones, broadcast systems, intercom systems, and more. This module also can be drive directly within 10W speaker with an internal resistance of 4 to 8 ohms. The audio output from this module also can be connected to the power amplifier module, so that the volume become louder.

Components List:

R1 & R4=22kΩ, R2, R10 & R12=1kΩ, R3=56Ω, R5=100Ω, R6=100Ω, R7=100kΩ, R8=10kΩ, R9=750kΩ, 10kΩ=R11,
D1=1N4148,
Q1=Transistor 8050, Q2=Transistor 9014, Q3=Transistor 9015, Q4=Transistor 8550,
MIC=Mic,
C1-C4 & C6=10uF, C7 & C8=470uF, C5=472 Ceramic Capacitor,
J1 & LS1= XH2.54-2P Connector.

STS-105A LM3915 AUDIO LEVEL INDICATOR DIY KIT

STS-105A LM3915 AUDIO LEVEL INDICATOR DIY KIT