Build Your Own 1.2k Voltage Monitor Circuit Diagram

Circuit Diagram

Components

Details

Upon application of a zero input voltage, the LED illuminates. The LED’s luminosity ceases as the voltage increases to a value dictated by R2. It is essential to connect the positive and negative terminals in reverse polarity to activate the operational amplifier’s inverse operating mode. Precise adjustment of R2 will determine the exact voltage at which the LED extinguishes itself.

UA741 Operational Amplifier

The UA741 is a versatile and widely utilized integrated circuit (IC) functioning as an operational amplifier. This IC is characterized by its dual-input, single-output configuration, offering high gain and stability. It is commonly employed in various applications, including amplification, filtering, and signal conditioning. The UA741 provides excellent performance across a broad range of frequencies and temperature variations, making it a reliable choice for numerous electronic circuits. It consists of two identical amplifier stages, enabling symmetrical performance and precise control over the amplified signal. Typically, this IC is powered by a dual supply voltage, offering flexibility in circuit design. The UA741's internal compensation circuitry ensures stable operation and minimizes the effects of parasitic capacitances, contributing to its excellent accuracy and reliability. Further, its robust construction and wide operating temperature range make it suitable for demanding applications.