How it works:
The flashlight turns on automatic for 60 seconds when it senses that the room is dark enough.
To turn on manual light for additional 60 seconds you need to push the RST button.
The Light sensing LED Flashlight is invaluable for emergencies such as power failures or blackouts.
Step 1: The Flashlight is invaluable for emergencies such as power failures or blackouts.
I have assembly several Flashlight, and have several dozen spear PCB board and components that I can share with any one who wish to make the flashlight.
The instructable contains:
- Flashlight schematic,
- PCB Assembly drawing,
- BOM – Components KIT cost less than $5
- Tools list
- Detailed step-by- step assembling instructions.
Specifications:
- Number of flashlight components: 15
- Color of LED’s light: white
- Number of LEDs: 3
- Light Distance: 2-3 meters
- Size of flashlight : 26.25mm x 20mm x 5mm
- Current consumption :
- LEDs turn ON: 4-5mA
- LEDs turn OFF: 30-45uA
- Battery capacity: 140mAh
- Battery voltage: 3V
- Battery life : up to 6 months (if flashlight turns on 2 times for 60 sec in 24 hours)
- Required skills : knowledge of soldering SMD components
