Universal SPI Box
A quicker way to program microcontrollers
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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The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.
Extra info / Update
A: Due to conversion problems experienced with the PCB files supplied by the author of the SPI Box project we have been unable to print PCB artwork with holes. As an alternative solution we are now offering Gerber files for the relevant board. The Gerber files are supplied free of charge and contain all PCB drilling information.
Component list
R2 = 820
R3 = 1k8
R4 = 680
R8, R11 = 1M
R10 = 4k7
R13 = 470
R15 = 100
Capacitors
C1-C5,C10 = 10µF 35V radial
C6 = 1000µF 35 V axial
C7,C9 = 22pF
C8,C12-C17 = 100nF
C11 = 100µF 16V radial
C18 = 47pF
Semiconductors
D1 = 1N4001
D2 = LED, yellow, low current
D3 = LED, red, low current
D4 = LED, green, low current
D5,D6,D9,D10 = BAW76
D7 = 1N4148
D8 = zener diode 3V9, 400 mW
IC1 = MAX232ACPE
IC2 = 7805
IC3 = TL7705ACP
IC4 = 74LS06
IC5 = AT89C2051-24PC, programmed, order code 050198-41*
IC6 = 74HC14
T1 = BC558C
Miscellaneous
X1 = 22.1184MHz quartz crystal
Bu1, Bu2 = mains adaptor socket for 2.1 mm plug, angled, PCB mount
K1 = 9-way sub-D socket, angled, PCB mount
K2 = 10-way boxheader, angled pins
Sockets for IC4, IC5 and IC6
Heatsink for IC2 (TO-220 case)
Case, OKW type TOPTEC 154F
Mains adaptor with 2.1 mm plug (negative on outer ring), 8-15VDC @ 300mA
PCB, order code 050198-1 *
PC software, AT89S binary & hex files: Download no. 050198-11
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