USB LED Light Desktop

USB LED Light Desktop - CircuitsToday

This is USB LED Light Desktop, taken from the circuitstoday, this suite can be used to light your desktop when you got the power failure, it’s very simple USB power lamp.

Components

• 1x USB Port Male
• R1 = 560 Ω
• R2 = 22 Ω / 1 W
• R3 = 1 kΩ
• D1, D2 = 1N4007
• D3, D4, D5 = LED
• Q1 = BC558
• C1 = 0,01 µF
• B1 = Battery 2×1,2V NiCad Cells
• S1 = Switch