Simple LED flashlight schematics, principles and components?
The basic principle of flashlight flashlight: by the luminous body, battery, circuit, shell, reflective ring, a circuit chamber, switches and other components, the basic principle of the current from the battery, and then reaches the circuit and through the circuit to adjust the voltage and current, and then output to the luminous body, for lighting.
This is the simplest LED flashlight circuit diagram
If the capacitor has only the charging process, the load will not be sustained current, and the role of D1 is to "C1". The discharge diagram looks a little simple, and it doesn't feel very safe. Full wave rectifier does not require four diodes?
The working voltage of the general white light LED is 2.8~3.2V, so the two batteries can work normally.If you want to use a battery (1.5V), then you need to use a boost circuit to power it.
