Flash Code Lock for PCs
Brains instead of brawn
Materials
Gerber file
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.
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Component list
(all SMD, 5%, case shape 0805)
R1,R2 = 22k
R3,R4,R5 = 1k
Semiconductors:
D1 = 1N4148, SMD, case shape 0805
D2 = zener diode 5.6V 500mW, SMD, MiniMelf case
IC1 = PIC16F628A-I/SO, SO18 case, programmed, Publishers order code 050107-41*
Miscellaneous:
K1 = 9-way sub-D socket (female), straight pins
9-way sub-D connector shell case
PCB, ref. 050107-1 from The PCBShop
Disk, PIC source and hex code files, Publishers order code 050107-11*.
CD-ROM, PC resident software, Publishers order code 050107-81* or free download (approx. 20 MB)
Flash PC Lock Software Guide, free download # 050107-12.zip
* See Elektor SHOP pages
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