lm358 preamp circuit | Next Electronics

This circuit can be used to remotely monitor a loudspeaker, alarm, or audio source for presence of an audio waveform. It can also be directly connected across loudspeaker terminals used as a peak indicator. If you need to monitor some...

amplifier timer circuit schematic

This circuit deactivates an amplifier or any connected device when a low-level audio signal at its input is absent for at least 15 minutes. By pressing P1, the device is powered on, supplying power to any appliance connected to SK1....

Audio remote control switch schematic

Each issue produces a specific frequency of sound, and the audio remote control will switch states based on these frequencies. The circuit is designed to detect other frequencies emitted by environmental sounds with strong anti-interference capabilities. The circuit operates on...

Automatic Fader Circuit

In this circuit, audio input to the control channel is amplified and rectified by diodes D1 and D2. This direct current level activates LED D3 through transistor Q2. The illumination from LED D3 causes R9, a light-dependent resistor, to reduce...

1Mhz-meter-driver-amplifier

This circuit utilizes the CA3100 BiMOS operational amplifier to drive a 1-mA meter movement to its full scale with a 1-V RMS input. The circuit configuration incorporates the CA3100 BiMOS operational amplifier, which is known for its high input impedance and...

Averager and Peak Hold/Extender Signal Conditioner

A signal averager circuit can be formed by an amplifier and active signal rectifier, which is implemented using two operational amplifiers in this circuit. The signal averager circuit utilizes two operational amplifiers (op-amps) to achieve signal averaging through amplification and rectification....

Broadband high frequency amplifying circuit

A broadband high-frequency amplifying circuit is primarily composed of a high-frequency matching transformer and an amplifying transistor. This circuit is designed to handle large high-frequency signals. The input of the amplifier circuit utilizes a matching transformer to ensure that the...

Audio Circuit(BassMidTreble)

The circuit design involves a circular operational amplifier (op-amp) configuration that functions as a second-order low-pass and high-pass filter. The low-pass filter operates within a frequency range of 20 to 250 Hz, while details regarding the high-pass filter are not...

Single Input to Differential Input Adapter for Digital Voltmeter

In some cases, a differential input is needed for voltage measurement. By using a single operational amplifier, it is possible to construct an adapter that provides a floating voltage reference. To achieve a differential input for voltage measurement using an operational...