Just took a circuit board of a small night light to study, probably curious, took a pen and plugged

Updated on Nightlight 2024-08-26
3 answers
  1. Anonymous users2024-01-24

    It should hurt the cornea, and it's usually fine in a day, so if it's not good, go and prescribe some eye drops.

  2. Anonymous users2024-01-23

    If you still feel uncomfortable in your eyes or feel that there is other light in your eyes after a few days, it is better to take a look.

  3. Anonymous users2024-01-22

    This should be fine, but it is recommended that you go to the hospital to avoid any sequelae or something.

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I accidentally short-circuited when plugging in. Be purposeful, don't play back and forth.

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This is a very simple three-stage DC-coupled transistor amplifier. The sound signal from the electret microphone is transmitted to the base of the transistor Q1 through the capacitor C1, and the amplified signal is output from its collector and sent to the base of Q2, the connection of Q2 is an emitter output, its function is not to amplify the voltage, but to reduce the output impedance of the emitter, so that it can provide a strong base current to Q3, so that it can output a larger collector current to light the bulb L

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It mainly depends on how your little night light works. If the power supply is converted to a low voltage (e.g., 12V, 24V, etc.), the line that touches the converted low-voltage part will not be electrocuted. If there is no conversion, the rated voltage of the night light is 220V, or it will be electrocuted if it touches the line before the conversion, and the current passed by the human body is calculated according to 220V, which will cause people to be electrocuted. >>>More

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There are light control lights on Taobao, and you can see them for 2 yuan, just 4 components, LED, 50K large resistance, light sensitive, and transistor.

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God, can you not take jokes as reality, I have seen ......... in books