Lm741 Circuits | Electronic Project Circuits

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High pass active filter by LM741

The high pass filter circuit is a high frequency filter, only through it. In this circuit we are use operational amplifiers IC 741 number, it is allows this circuit has a lot performance,and has cut off frequency precise. Despite the possibility of multi-circuit filter,With different levels of growth and differentiation of a roll back in the op-amp IC. But this circuit can reduce the frequency cut off, so successful, the device configuration, R1 = R2, C1 = C2.

Be the first to comment - What do you think? Posted by admin - September 26, 2011 at 11:10 pm

Categories: Op-amp circuit, Oscillator generator Tags: Active high pass filter circuit, lm741 circuits

Op-amp siren sound using ic 741

This circuit is the sound generator super siren, for use be alarm signal get by live frequency generator circuit that use , op-amp circuit. The principle works to are while still no press switch S1 will still have no the loud sound comes out from a loudspeaker SP1. When do pressure switch S1 then liberate C3 do something charge full until while press switch S1 and discharge go out. When liberate switch S1 come in at R7. Which perform in something limit current come in at 3 Non inverting legs of IC1a. By IC1, D1, D2, C1, C2 and R5 build be sound generator signal circuit then export come to way pin 6 of IC1a come to reach at pin 3 (Noninverting) of IC1b. By have R1 and R2 build be Dectector circuit. For do fining level has signal then signal to come out the way pin 7 of IC1b which will have flowing through comes in at pin B of Q1 for do something bias give Q1 bias. When Q1 work then make SP1 make a noise loud come out and make a noise poor loud C3 discharge be finished SP1 then stop make a noise loud.

Be the first to comment - What do you think? Posted by admin - June 30, 2010 at 11:08 pm

Categories: Alarm systems Tags: Emergency siren, lm741 circuits, Op-amp circuit

Active high pass filter circuit using LM741

This is active high pass filter circuit for 327Hz frequency using LM741 or LM741 circuits. It will use to build Harmonic at 3 of 130.81 frequency have the value at least. More than the frequency Fundamental 30 dB, for output be sawtooth wave form for use in sound of music way system Electronic design will use the circuit filters three rank frequency. By have 3 dB you slopes can use Op-amp IC number LM741 or number LF351, it will meet the frequency well.