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:: Home » NPN transistor circuit

NPN transistor circuit

LED VU Meter circuits using transistors, 5 to 20, 40 LED

Last Updated on: April 16, 2022 by Apichet Garaipoom
LED VU meter transistor

See LED VU meter using transistor is analog circuit to show the level of power audio signal. You can build 5 LED to 20 LED display with PCB. Read more

Categories Meters & Detectors Tags Sound Level Meters, NPN transistor circuit, VU Meters 13 Comments

How does a transistor circuit works

Last Updated on: June 14, 2022 by Apichet Garaipoom
How does a transistor circuit works

Learn transistor circuit works, old parts But, we often use it. Because of durable, high current. Whether any reason. Let’s learn they works in simple way. Read more

Categories Basic Electronics Tags NPN transistor circuit, simple principles of electric circuits. 4 Comments

Lie detector circuit

Last Updated on: July 12, 2021 by ElecCircuit.com
Lie detector circuit

See and try building Lie detector circuit. The resistance of human skin using transistors and LED displays is small and easy application. Read more

Categories Meters & Detectors Tags NPN transistor circuit, Electronic game circuit diagram 12 Comments

Very simple amplifier circuit using transistor 2N3904

Last Updated on: June 25, 2022 by Apichet Garaipoom

It is Very simple amplifier circuit using transistor 2N3904 only, low noise than normal IC circuits, low distortion,frequency response: 20 Hz to 20 kHz. Read more

Categories Preamplifiers, Amplifiers Tags 2N3904, NPN transistor circuit 12 Comments

Categories

  • Amplifiers (94)
    • Preamplifiers (20)
  • Power supply (86)
    • Variable Supply (20)
    • Switching Mode (15)
  • Inverters (14)
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