-
Anonymous users2024-01-24This 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
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.
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
I accidentally short-circuited when plugging in. Be purposeful, don't play back and forth.
Shanxi Tidesen office furniture is very good.
Summer Lucky Star.
It is a comedy action film directed by Sammo Hung, written by Wong Bingyao, starring Sammo Hung, Yuan Biao, Jackie Chan, Qin Xianglin, Wu Yaohan, Zeng Zhiwei, Shum Jianxun, etc. >>>More