10K and 330K resistors, BC548 and BC 558 transistors, 3V battery, 01mf capacitor, and speaker. The required components to build this circuit are probes. This circuit is used in homes to guard their washed clothes and other things that are vulnerable to rain when they stay in the home most of the time for their work. The following rain circuit is used to give an alert when it’s going to rain. DC Lighting Simple Electronic Circuit Rain Alarm A switch is connected in between wire to give a supply DC voltage to the LED bulb. The +ve terminals of the lamp are connected to the anode terminal of the battery and the –ve terminal of the battery is connected to the –ve terminal of the battery. Here, a lamp is used as a load, that has two terminals such as positive and negative. A DC supply is used for a small LED that has two terminals namely anode and cathode.
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