Tone control

simple audio mixer circuit with fet 2n3819

This circuit, a simple mixer circuit.It can mix two signal channels and one channel is output.Using a codec circuit,Convert stereo audio to mono audio time.
It can increase the number of channels too. By adding a VR1, R1 and C1 to the amount needed. Then connected to Buffett a new one.Most importantly is eating circuit current is very low.Can use with 9-volt batteries immediately.
When entering voice signal, one of input 1 and input 2. Audio is via C1 and C2 of each channel,served coupling signals to VR1 and VR2. To adjust the audio to the Fet Q1.Which it serves, including audio. Then expand signal the output pin S through C3 For coupling signal again, before leaving to the output.

Be the first to comment - What do you think? Posted by admin - September 13, 2010 at 11:22 pm

Categories: Audio diagram, Pre Amplifier, Tone control Tags: 2N3819, audio mixer, fet amp

Passive tone control circuit

The Passive tone control circuit be the circuit fines the bass that has no the expansion but will give kind equipment R and C. It perform filter frequency then the circuit that build easy and must not use power supply. By can concede the porch with part power amplifier of output immediately.
When feed input come in sound signal will that come in to separate is 2 the way by first way will change to come to a part filters low frequency for example R1, C1, C2, R2. By have VR1 be formed fine expansion way ratio low frequency is or sound in the sense of second a signal will change to come to a part filters tall frequency for example C4, R5, C5 by have VR2 be formed fine the value of tall frequency or treble a signal that depart a part filter tall frequency and low change R3 and R4 congregate then go out still output. By have C3 perform eradicate the noise goes out.
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Be the first to comment - What do you think? Posted by admin - June 28, 2010 at 11:20 pm

Categories: Tone control Tags: Passive tone control, tone control circuit

Stereo tone control circuit using IC TDA1524A

The stereo tone control circuit with IC, be the circuit diagram that use just IC number TDA1524A. It be pillar heart in the work which, be IC the integrated circuit diagram of Philip. It can use a part tone control or a part fines the sound bass, treble and balances get whole setly by can enlarge a signal gives the power can go up to arrive at 3 Vrms have 20 dB expansion rates and are guilty are crazy a little more 0.014% at 1 kHz frequency and that important. It be the circuit that build not difficult and a little equipment, Then suit old the education or be usable indoor or may apply outdoor work should get.

Work cycle It starts from the input power supply integrated into the 3 pin is the positive voltage and negative voltage to pin 8, which this circuit will have only R and C classes of devices to filter out frequencies in different area. A few can work then. When the signal from the sound source into the pin 15 of IC1, the INPUT signal is coupling through the C1 and C2 signals of each channel.
Left and the right, then the IC will amplify signals with C6 and C4 to control how often the Department Loudness which switch S1 is the option of the use of the region tone control or sector adjust bass Cape will have C5 and C3 act as frequency control with VR1-VR4 to adjust the Volume, Balance, Bass and Treble, respectively.

Then the signal was expanded and fine-tune frequency, and sends out the pin 8 and pin 11 of audio IC of each box will be R1 and R2 serve to decrease the signal appropriately
And signal coupling through C9 and C10, with R3 and R4 eliminate DC comes out of the ground out into the C11 and C12 will be made to eliminate the high frequencies from 70 kHz up to. To ground, and then sends the signal to the output signal and a voice came out crystal clear.