Posts Tagged ‘Audio Control’
Telephone Circuit: Music On Hold
Waiting a call hold can be boring if there is only silence on the line. It’s a good thing to present an “easy music” in call hold, make a long waiting time feels much shorter. This simple circuit (consists of diodes, SCR, and some passive components) allows to place the caller on hold in one …[Read More]
Voltage-Controlled Attenuator (Volume Control) Using FET
Using the circuit shown in the schematic diagram below, we can control the low-level audio signals with ±3V variable DC voltage. This attenuator circuit uses a field effect transistor (FET) to shunt the signal to ground. The R2 is used to control the output level (the attenuation level), but you can use other source of …[Read More]
Using circuit shown below, we can invert or amplify without inversion by flipping a switch. The voltage gain is depending on the switch position. It could be either +1 or -1. The variation of the circuit comes in two version, A and B. I personally prefer B version, since there is no moment when the …[Read More]
TDA1524A Voltage Controlled Tone and Volume Control
The device below is built as an active stereo-tone/volume control for TV receivers, car radios and mains-fed equipment. The device below has function for bass and treble control, volume control with built-in contour (can be switched off) and balance. We can control all these function using dc voltages or by single linear potentiometers. This device …[Read More]
TEA6320 Multichannel Audio Selector and Volume Control
High-end audio equipments are normally digitally controlled by a a microprocessor (microcontroller) system. It’s necessary to have digital interface that provide control for audio signal switching, as well as programming the gain to control the signal volume. TEA6320 comes with the solution for digital control of audio source channel selector and …
Digitally Controlled Phase Shifter
As shown in a schematic diagram below, this circuit implementation of phase shifter circuit is well suited to using digital potentiometer to control the resistive control element of the phase shifter. The phase at a given frequency is now under control of a digital signal using this circuit which is optimized …
Stereo Digital Volume Control
It’s good to use CS3310 because CS330 is a complete stereo digital volume control designed specifically for audio systems. This device has features like 16 but serial interface that controls two independent, low distortion audio channels. An array of well-matched resistors and a low noise active output stage that is capable of driving a …
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