Thus Apply test voltage to the base resistor To be completely safe, you could do something like delayMicroseconds(100) before reading the collector state. The worst case, is when the base current is released, and the circuit stray capacitance combines with the 30k pullup resistance to make a relatively sluggish RC circuit.
#2n3904 transistor base emitter collector code
In the case of your transistor circuit, it is faster than the Arduino core code that is used to read and write the I/O pins. The only catch about timing is - you have to ensure that enough time has elapsed after changing the state of the test signal, until you make the measurement. If my fingers and eyes were fast enough, I could complete the entire test in nanoseconds. *This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information.How would I test a room light? Turn the switch on - is the light on? Now turn it off - is the light off? Now I have all the data I need. It has a maximum collector current of 600mA and a maximum collector-emitter voltage of 40V.
KSP2222A: This is another NPN bipolar junction transistor with a similar package and pinout as 2N3904. PN2222A: This is another widely used general-purpose NPN bipolar junction transistor with a similar package and pinout as 2N3904. It has a maximum collector current of 100mA and a maximum collector-emitter voltage of 30V. It has similar electrical characteristics, including a maximum collector current of 100mA and a maximum collector-emitter voltage of 45V, making it a possible drop-in replacement in certain applications.īC548: This is another general-purpose NPN bipolar junction transistor with a similar package and pinout as 2N3904. Here are a few possible replacements for 2N3904:īC547: This is a general-purpose NPN bipolar junction transistor with a similar package and pinout as 2N3904. It has a maximum collector current of 200mA and a maximum collector-emitter voltage of 40V. Its small size and wide range of applications make it an essential component in many electronic circuits.ĢN3904 is a widely used general-purpose NPN bipolar junction transistor that is commonly used in amplification and switching applications. Overall, the 2N3904 is a widely used transistor due to its low cost, availability, and versatility. Its high transition frequency makes it suitable for use in high-frequency applications, while its low input and output capacitances make it ideal for use in circuits where fast switching is required. The 2N3904 can be used in a variety of electronic circuits, such as amplifiers, switch drivers, and general-purpose switching applications. Some of the technical specifications of the 2N3904 are:Ĭollector-Emitter Saturation Voltage: 0.2V It is a small signal transistor with a maximum collector current of 200 mA and a maximum collector-emitter voltage of 40 V. NPN silicon epitaxial planar transistor for switching and Amplifier applicationsĢN3904 is a commonly used NPN bipolar junction transistor (BJT) in electronic circuits for amplification and switching applications.
NPN SILICON PLANAR EPITAXIAL SWITCHING TRANSISTORS
NPN Silicon Transistor (General small signal application)
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