The characteristic diagram is a cluster of curves.
The horizontal axis is the collector-emitter voltage U_CE, and the vertical axis is the collector current I_C. The static characteristics of transistor 2N3904 are shown in the figure. Choose the appropriate base power supply VBB and collector power supply VCC, as well as Rb and Rc to ensure that the 2N3904 works in an amplified state. The base resistance Rb and the collector resistance Rc are used to convert voltage changes into current changes. The transistor selects the transistor 2N3904. The working circuit of the transistor is shown in the figure. Common emission amplifier circuit (working circuit) After each step of the design, make it, and use the experience gained in the making process to carry out the next design until you successfully design and make an oscillation circuit.1. This article will start from the working circuit and design an oscillator circuit step by step. TooGoo It also offers another pack somewhat cheaper and with 25 units of the 2n3904.Introduce a kind of LC oscillation circuit here, its oscillation amplitude can drive TTL circuit, its oscillation frequency is 1Hz.It also has this pack of 50 units of the 2n3904.Transistors of multiple types, among which is the 2n3904. For example, here are some recommendations: To buy a transistor Of these characteristics, you can use the different services of stores specialized in electronics, or on platforms such as Amazon. Emitter collector - saturation voltage less than 300 mV at Ic = 10mA.Joint operating temperature range: -55✬ to 150✬.Collector current for direct current: 200mA.If you wonder about the detailed features of this type of transistor, here are some of them: In addition to Motorola, it has been manufactured by many other companies such as Fairchild, ON Semiconductor, Semtech, Transys Electronics, KEC, Vishay, Rohm Semiconductor, Texas Instruments (TI), Central Semiconductor Corp, etc.Īs for the your pinout, you can see it in the previous image, that as is usual in transistors, you have three numbered pins leaving the rounded part of the package towards the back, that is, to interpret the drawing and match the one you hold in your hand now, you should put the flat part in front of you.
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