Bd139 circuit diagram. Apr 12, 2019 · In a given circuit diagram, there is a 2-watt class-AB audio power amplifier which provides low harmonic distortion and wide frequency response. May 3, 2022 · Here we will discuss the Introduction to the BD139 transistor, Pin diagram, How it Works, Specification, Features, Equivalent, Applications, and Download Datasheet. Oct 18, 2018 · BD139 is a NPN transistor with a gain value of 40 to 160, this value determines the amplification capacity of the transistor. com The circuit diagram for this application is shown in the image above. See full list on elprocus. . The BD139 is a versatile transistor widely used in electronics due to its robustness and reliable performance across a range of applications. With this H-bridge circuit, enough power is delivered to run two DC motors smoothly and with this, we can also control the direction of rotation of the motors. It has the capability of driving an 8O loudspeaker with an output power of 5 watts. Jun 26, 2025 · This circuit diagram illustrates a simple audio power amplifier test circuit based on the BD139 transistor. The input audio signal first passes through a 47μF coupling capacitor and enters the base of a small-signal transistor (2N3904), which functions as the preamplifier. Circuit Design: Check the hFE range to ensure the transistor matches the required gain for your circuit. nhiqk rtfr jgsw bmrxnsne luy xawjv pyn xyyztw vceayg ksqm