- on Hobby & Modelling
- Published in issue 11/2002 on page 0
flashlight goes high-tech
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.
R1 = 680 ?, SMD size 0805
C1 = 220nF ceramic, SMD size 0805
C2 = 33µF 20V, SMD size 2220
C3 = 1µF 6.3V, SMD size 1210
L1 = 233µH (100kHz), ESR = 0.27 ?
Pot core P9.0x5.0/N26 (Al = 250) with 30.5 turns of 0.22mm dia. ECW
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
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)