Rain Alarm Circuit Using Bc547. Zener diode 5 1 volts 400 mw. Pir sensor only detect the presence of the infrared rays which comes into its range it does not emit infrared.
This circuit alerts the user when it s going to rain. Some other projects using bc547 transistors. A very nice adjustable power supply unit may be built using just a couple of transistors and a few other passive components.
Automatic fire alarm with the help of 547bc and thermistor.
Use of 547 transistors in flip flop circuits. General purpose portable dc power supply using rechargeable c cells. Zener diode 5 1 volts 400 mw. Trang tin tức online với nhiều tin mới nổi bật tổng hợp tin tức 24 giờ qua tin tức thời sự quan trọng và những tin thế giới mới nhất trong ngày mà bạn cần biết.
