LED Torch
flashlight goes high-tech
Materials
Gerber file
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Component list
R1 = 680 ?, SMD size 0805
Capacitors:
C1 = 220nF ceramic, SMD size 0805
C2 = 33µF 20V, SMD size 2220
C3 = 1µF 6.3V, SMD size 1210
Inductor:
L1 = 233µH (100kHz), ESR = 0.27 ?
Pot core P9.0x5.0/N26 (Al = 250) with 30.5 turns of 0.22mm dia. ECW
Semiconductors:
D1= BAT48 or 1N4148
D2-D8 = LED, 5mm, white, 6400mCd (Nichia, NSPW500BS) (www.nichia.co.jp/lamp-e.htm), available from Conrad Electronics
T1=BSP308, BSP319 (RON=50m?)
T2=BS170, BSS138 (RON=5?)
IC1=PIC12C672 04/SM, programmed, order code 012019-41
IC2=LM9140-2.5 or TL431
Miscellaneous:
S1,S2 = SMD switch, 1 contact (Mentor 1254.1007 or 1301.9314 or Omron B3FS-1052 from Farnell)
Battery = Sanyo UR18650 Li-Ion, 1350 mAh (18mm, length = 65mm, weight 40g) or Sanyo UR18500 Li-Ion, 1100 mAh (18mm, l = 50mm)
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