How To Make Audio Preamlifier part 2
This things are required to make it.........
1.👉 one pcs plastic case.
2.👉 2 pcs single trun 100k potentiometer...........https://amzn.to/2ATMyqK
3.👉 2 pcs mic socket..........https://amzn.to/2T43thv
4.👉 2 pcs 3mm led.........https://amzn.to/2ATMAyS
5.👉 2 pcs 680 ohm resistor............https://amzn.to/2QYhA5X
6.👉 2 pcs spst switch..........https://amzn.to/2Cy1sTw
7.👉 one pcs Bluetooth module..........https://amzn.to/2R17gtP
8.👉 one pcs audio input socket [for 3.5mm jack]..............https://amzn.to/2T51Ujg
9.👉 one pcs audio input socket [for RC socket].
10.👉 one pcs dc socket...........https://amzn.to/2B4Wlun
11.👉 one pcs 7805 voltage regulator ic..............https://amzn.to/2W6akZx
12.👉 Mic circuit........watch our previous video.
How To Make It.............??
audio preamplifier part 2
watch this video for better understanding
Circuit Diagram
Watch this circuit diagram and follow my steps for make it.
This post is audio preamplifier part 2. So you don't see our previous post (audio preamplifier part 1). Please watch our previous post and then watch and read this post.
*Then you want 1 pcs spst switch, 2 pcs 100k potentiometer, and 1 pcs dc socket.
*Then cut the plastic case as well as this picture, and input 2 pcs potentiometer, 1 spst switch, and 1 dc socket.
*Then you want MIC circuit.
How to make MIc circuit...........https://www.technicalmriganka.com/2019/02/how-to-make-mic-circuit.html
*Then connect mic input wire on mic circuit. Connect mic input where 10k resistor and 104j capacitor connected. And ground wire connected to ground. [connect after watch circuit diagram]
*Then connect mic output wire. Connect mic output where 104j capacitor connected. And ground wire connected to ground. [connect after watch circuit diagram]
*Watch this picture, MIC input and MIC output.
*Then connect mic socket with mic input wire. Left side mic input wire connect with left side mic socket, right side mic input wire connect with right side mic socket, and ground wire connect to mic circuit ground. [connect after watch circuit diagram]
*Then mic circuit output wire connect to 100k single turn potentiometer, Left side mic output wire connect with left side potentiometer, right side mic output wire connect with right side potentiometer, and ground wire connect to potentiometer ground.
*Watch the picture potentiometer down side pin is GND, middle pin is output, and upper side pin is input.
*Then connect wire on potentiometer output pin [as well as this picture].
*Then potentiometer output pin's wire connect to audio RC socket [as well as this picture]. Right side potentiometer output pin's wire connect to audio RC socket right side pin, left side potentiometer output pin's wire connect to audio RC socket left side pin, and potentiometer gnd wire connect to RC socket ground pin.
*Then connect voltage wire on mic circuit. Connect 12 volt wire on 100/220uf capacitor [+] and ground wire connect to capacitor [-]. [connect after watch circuit diagram]
*Then connect 12 volt on mic circuit and bluetooth module through the spst switch. [connect after watch circuit diagram]
*Then 3.5mm LED's [-] pin connect to GND. And LED's 680E resistor connect second side of SPST switch. [connect after watch circuit diagram]
Thank you,
Technical Mriganka...........
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