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.
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
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.