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Title: Mini Mic Pre-Amplifier Circuit based IC LM358
Page Link: Mini Mic Pre-Amplifier Circuit based IC LM358 -
Posted By: seminar paper
Created at: Saturday 25th of February 2012 05:35:28 PM
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Mini Mic Pre-Amplifier Circuit based IC LM358



Simple Audio Pre-Amp circuit
Designed based on single Transistor 2N3904, this circuit will provide good gain for weak audio signals such as electret microphone. Easy to build and really simple for pre-amp circuit

Condenser Mic preamplifier
This is a very simple preamplifier circuit for condenser microphone. This mic preamplifier also can be used for dynamic microphone.

You can replace the BC549 ....etc

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Title: circuit diagram of electronics stethoscope using lm358
Page Link: circuit diagram of electronics stethoscope using lm358 -
Posted By:
Created at: Wednesday 15th of July 2015 10:21:47 PM
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I need circuit diagram of electronics stethoscope because of my project.....i have an challenge to build a instrument that caunt our heart beat and send to digital display plz give me circuit diagram ....etc

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Title: simple touch alarm circuit using ic 555 ppt
Page Link: simple touch alarm circuit using ic 555 ppt -
Posted By:
Created at: Monday 15th of July 2013 11:20:04 PM
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Title: solar tracker report with lm358
Page Link: solar tracker report with lm358 -
Posted By:
Created at: Wednesday 15th of November 2017 07:22:33 PM
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Solar tracker by using  lm358 project report ....etc

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Title: lm358 work with ldr in heart beat sensor
Page Link: lm358 work with ldr in heart beat sensor -
Posted By:
Created at: Tuesday 05th of March 2013 10:07:14 PM
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i want heart beat sensor using ldr and lm358.its my major project.can u plss send it as soon as possible ....etc

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Title: Sound operated switch using a simple transistor circuit
Page Link: Sound operated switch using a simple transistor circuit -
Posted By: project topics
Created at: Saturday 24th of April 2010 02:06:59 AM
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Clap Switch
Sound operated switch using a simple transistor circuit
The operation is simple. Clap and the lamp turns on. Clap again and it turns off.
The electret microphone picks up the sound of your claps, coughs, and the sound of that book knocked off the table. It produces a small electrical signal which is amplified by the succeeding transistor stage. Two transistors cross connected as a bistable multivibrator change state at each signal. One of these transistors drives a heavier transistor which controls a lamp.
I ....etc

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Title: Simple Fire Alarm Circuit
Page Link: Simple Fire Alarm Circuit -
Posted By: smart paper boy
Created at: Saturday 18th of June 2011 07:23:09 PM
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Simple Fire Alarm Circuit
Here is a simple fire alarm circuit based on a LDR and lamp pair for sensing the fire.The alarm works by sensing the smoke produced during fire.The circuit produces an audible alarm when the fire breaks out with smoke.
When there is no smoke the light from the bulb will be directly falling on the LDR.The LDR resistance will be low and so the voltage across it (below .6V).The transistor will be OFF and nothing happens.When there is sufficient smoke to mask the light from falling on LDR, the ....etc

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Title: solar tracking system using lm358 ic
Page Link: solar tracking system using lm358 ic -
Posted By:
Created at: Wednesday 15th of November 2017 08:07:26 PM
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I want project report on solar tracker by using lM358 ic ....etc

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Title: heartbeat sensor using lm358
Page Link: heartbeat sensor using lm358 -
Posted By:
Created at: Saturday 27th of May 2017 12:24:06 AM
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Hi am piusha i would like to get details on heartbeat sensor using lm358 ..My friend Justin said heartbeat sensor using lm358 will be available here and now i am living at barasat and i last studied in the school bdmi... and now am doing btech ...i need help onmy project.etc ....etc

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Title: simple quiz buzzer circuit using led and buzzer without using led display
Page Link: simple quiz buzzer circuit using led and buzzer without using led display -
Posted By:
Created at: Sunday 14th of April 2013 03:00:05 PM
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please give the information of quiz circuit with advantages & disadvantages ....etc

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