AUDIO FREQUENCY METER circuit

The circuit diagram represents a booster for an audio application. It features a linear potentiometer R5 with a resistance of 100K ohms, which includes an on/off switch. The capacitor C1 should be selected with a value between 0.05 µF and...

PC Based Frequency Meter

A technique for measuring frequencies across a wide range with acceptable accuracy using a PC is described. This method involves measuring the period of a complete wave at low frequencies to calculate frequency from the measured time period. Cascaded binary...

8 Watt Audio Power Amplifier Schematic

Useful circuit for self-powered speakers, radios, and TVs; can be used as a car power amplifier. Here is the schematic for an 8-watt audio power amplifier. The described circuit serves as an 8-watt audio power amplifier, suitable for various applications, including...

Audio Volume Control with Resistor Switches

The traditional potentiometer is implemented with an electrical contact that slides over a resistive layer. An example of a well-known audio-grade potmeter is the Alps Blue. A high-end (good and costly) alternative is the rotary switch. This device consists of...

Small IC amplifiers for speakers

A small amplifier IC circuit has been compiled. This circuit is part of an older series and is categorized as a simple OTL (Output Transformer-Less) circuit. The presented small amplifier IC circuit is designed for applications where compact size and simplicity...

why doesnt this circuit oscillate

The buba oscillator initially failed to oscillate. The first step is to check the fundamental components, as minor errors in the values of capacitors, resistors, and inductors can significantly impact performance. It is advisable to measure component values with a...

FFT audio amplifier design

For all the subsequent tests, a high-quality signal generator from BlackStar was utilized. The PicoScope trace displayed below illustrates a pure 1 kHz tone from the signal generator. It is important to note that while the screenshots below depict the...

Low-cost-frequency-counter

This counter features a four-digit display that can be switched to display frequencies ranging from 1 to 40 MHz, with a resolution of 100 Hz. The MM74C926 CMOS IC serves as the four-digit decimal counter, which can latch a specified...

1Hz to 1MHz Frequency Meter with Digital Display

The circuit was designed to create a low-cost frequency meter that will cover the range of 1 Hz to 1 MHz with a digital indication using three 7-segment displays. The frequency meter circuit operates by measuring the frequency of an input...