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Hi , i a computer person trying to build a project based on programming and electronics. Can someone explain me what should be checked when connecting a device (Bulb,LED,Motors etc) to a electronic circuit. Should i be checking the input voltage required or input current required.. like i have a 5V supply how many motors can i power by it ? If i pass a higher voltage than required what will happen or if i provide a higher current what will happen ? (i dont what to blow up stuff in my testing :P) What does the speed of a motor or brightness of a LED depend on ? These are probably noob questions for electrical guy .. please help .. good example based explanation will be helpful .. and yes i know the OHM's law 🙂 ... BTW i am using a Arduino UNO.. Thanks a lot.
And got the following answer:
So you want a course in electronic engineering in one paragraph? Isn't going to happen. Pick one device and the driving source, with specs on all the parts, and I can advise you. Some parts, like LEDs are current driven, and require a current driver or at least a resistor. some. like relays and solenoids, require higher current and also require spike protection to prevent the driver from being damaged. for example, your question "i have a 5V supply how many motors can i power by it", it depends on your power source, and the motor specifications. If they are 120 VAC motors, the answer is zero.