vu meter schematic

The mini condenser microphone converts sounds into an electrical signal. Resistor R1 provides bias for the condenser microphone's internal amplifier transistor. The 2N3906 PNP transistor acts as a low-noise microphone input amplifier. The 10K gain potentiometer is used for...

This circuit integrates a current source and a platinum RTD bridge to create a high-accuracy thermometer. The ground-referred RTD is part of a bridge that includes the current drive and the LT1009 biased resistor string. The current drive enables...

This circuit will give you a good, accurate watt meter that can measure various power levels. In the original article, the shunt was a 0.001 Ohm copper shunt giving a 1000 Watt scale. However, because most circuit breakers in...

A voltage-controlled oscillator (VCO) using the LM324 operational amplifier is being developed, inspired by the Korg Monotron schematic. The goal is to create a simple circuit that produces audible waveforms, specifically square and triangle waves, when connected to a...

Pulses are received by the timer from the distributor points. When the timer output is high, Meter M receives a calibrated current through R6. The meter does not... The circuit described involves a timer that receives pulse signals from distributor...

The untuned, yet amplified Frequency Selective Measurement (FSM) circuit can detect signals ranging from 3 to 148 MHz and is remarkably resistant to overload, ensuring that the meter pointer does not reach its maximum. The core component of this...