This is simple hight power LED flashlight,we use 24 LEDs super bright for display and 3 AA batteries and resistor for limit current so cheaper.
My son buy this LED flashlight but is low light. Thus, he want to builds the new high power LED flashlight with himself.
How does it works
We use the 24 white super bright LEDs. As circuit diagram in Figure 1. They are connected together in parallel. The each LEDs need to use the voltage about 3.3V – 4V at 20mA current. It makes LEDs uniform brightness, but use all current are 0.4A to 0.6A.
Figure 1 Simple High power LED flashlight’s the circuit diagram
We used 1 ohms resistor for limit current to save This circuit we use 3x AA 1.2V x A nickel-metal hydride battery. So there total voltage is 3.6V
Let’s build this project
We assemble the LEDs and resistor on universal PCB Board. As Figure 2
Then,solder the LED’s leg and resistor 1 ohms. This step is hard for my son. As Figure 3
Finally, soldering all parts on PCB and wiring.
We measure all current active approximately 0.5A but very very bright. As Figure 4
Then, Glued to install the PCB to the battery holder. As Figure 5
Next, We attach a high magnetic to Can be used on cars or steel cabinet doors made from steel and more easily. As Figure 6
The end, We made a Simple High power LED flashlight successfully. As Figure 7
My son is happy, it has very high brightness.
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how do you find resistors watt? Please reply.
Nice Job On This Project!!! Many Thanks(For The 1000th Time) From MROHM1970
@Salim…Here Goes..P= E x I = .4a x 4v5 = 1W8…( 1.8 watts)..,Use a 2 to 5 watt resistor . Nothing Hard Here…. We are Just Using Ohm’s Law!!! Good Luck With Your Project!!!
Hi Salim Khan,
Thanks for you feedback.
My son use 1Watts only it not hot because he use short times.
Hi Rick hodgson,
Thank you so much. That you helping me. Your sound is useful.
bravo,frumos proiect,vi\oi face acest circuit pentru biciclta
help me. your fone number i call you.