 |
|
Electronics Circuits &
Tutorials |
|
|
|
|
|
|
|
|
|
|
Home >
Electronic Tutorials >
Alarms
and
Security
Related
Schematics > ECM Mic Preamp / Pre-Amplifier |
|
Alarms & Security Related Schematics and
Tutorials |
ECM Mic Preamp / Pre-Amplifier
|
|
|
|
Parts:| U1 | LM741 op amp ic | | R1 | 1 megohm resistor | | R2, R3 | 6.8k ohm resistor | | R4 | 1k ohm resistor | | C1, C2 | 0.47uF ceramic capacitor | | MIC1 | electret condenser microphone |
All resistors are 5 or 10 percent tolerance, 1/4-watt all capacitors are 10 percent tolerance, rated 35 volts or higher.
This circuit amplifies the output of a regular electret condenser microphone quite nicely.. adjust sensitivity by turning R1
|
|
|
|
|
Note: To report broken links or to submit
your projects please send email to
Webmaster |
|
|
|
|
|
|
Copyright © 1999-2020
www.hobbyprojects.com (All rights
reserved) |
|