Sound Activated Toys circuit | Next Electronics

Suggestions for mic pre schematics circuit

A student is working on a project related to active electronics as part of their second year in a bachelor's program in audio production. Active electronics refers to electronic circuits that require an external power source to operate, typically involving components...

Using the Panasonic WM61A as a Measurement Microphone

Measurement microphones differ from recording microphones and sound meters; they have a flat response (usually well below 20 Hz and above 20 kHz) and do not have a "weighted" or equalized frequency response. They are optimized for measuring high SPL...

DC-Coupled Audio Amplifier Circuit

This design circuit for audio amplifiers with DC coupling to the load is not commonly used today, despite its clear advantages. One advantage is the elimination of the need for a second (symmetric) power supply, and another is the improved...

LMV1090 Dual Input Far Field Noise Suppression Microphone Amplifier

Figure 1 illustrates the schematic for a universal input, 7.6 V, 700 mA constant voltage/constant current (CV/CC) power supply designed for LED driver applications. This design employs the LinkSwitch-II product LNK606PG in a flyback configuration. The LNK606PG (U1) integrates a...

Power Supply For Amplifiers

For the 60W amplifier, a nominal (full load) supply of +/- 35V is required, so a 25-0-25 secondary is ideal - however, see Updates, below. The circuit for the supply is shown below, and uses separate rectifiers, capacitors and fuses...

Amplifier Timer

This circuit turns off an amplifier or any other device when a low-level audio signal fed to its input is absent for 15 minutes at least. Pushing P1, the device is switched on, feeding any appliance connected to SK1. Input...

Balanced Microphone Preamp

The design consists of differential compound pairs of transistors with a common mode (floating) gain control connecting the emitters of the pair. The compound pairs of 2N4403 and BC549s are far more linear than any single transistor. The circuit is...

room noise detector circuit schematic

This circuit is designed to indicate, via a flashing LED, when room noise exceeds a predetermined threshold, selectable from three fixed levels: 50 dB, 70 dB, and 85 dB. The circuit utilizes two operational amplifiers to amplify the sound captured...

General-Purpose Output Amplifier Circuit

This general-purpose amplifier has a bandwidth of approximately 20 MHz and it uses an LM733/NE592 video amplifier integrated circuit. This circuit can be utilized as a line driver or as a LAN line driver. The circuit employs the LM733/NE592 video amplifier...