89S8252 Flash Microcontroller Board
Educational hardware and softwareplatform for the Microcontroller Basics course

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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.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
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
Also, a timing problem was discovered in the original download utilities. Both problems have been addressed and an update is available at: www.b-kainka.de/basismufaq.htm
Component list
R1,R2,R6,R7 = 27kOhm
R3,R5 = 1kOhm
R4 = 47kOhm
P1 = 10kOhm preset H
Capacitors:
C1,C2 = 22pF
C3,C5,C6,C14,C15 = 100nF ceramic
C4,C7-C11 = 10µ F 63V radial
C12 = 1000µ F 16V radial
C13 = 100µ F 10V radial
Semiconductors:
D1,D2 = zener diode 4V7, 500 mW
D3 = BAT85
D4 = 1N4001
IC1 = AT89S8252 24PC
IC2 = HC126
IC3 = 74HCT573
IC4 = 62256 120 ns
IC5 = 74HCT00
IC6 = MAX232
IC7 = 7805
Miscellaneous:
K1,K2 = 9-way Sub-D socket (female), angled pins, PCB mount
K3 = 14-way boxheader
K4-K7 = 8-way SIL pinheader
K8 = 34-way boxheader
K9 = socket for mains adaptor
S1 = pushbutton, make contact
X1 = 11.0592 MHz quartz crystal
PCB, order code 010208-1
Disk, project software, order code 010208-11
Discussion (0 comments)
DE147685 3 years ago
thank you for publishing the Gerber-files for the 89S8252 Flash-Mikrocontroller-Board.
Unfortunately these files cannot be used by all the pcb manufacturers that I contacted.
Is it possible to publish the Gerber-files in Gerber RS274 X format ?
The existing files are worthless because PCBs with this old Gerber format cannot be produced.
Or do you know a manufacturer that can handle these files ?
Thank you very much in advance
Your Elektor Fan
Manfred Heielr
ClemensValens 3 years ago
Interesting that you want to build this old microcontroller project. Unfortunately the tools used at the time to create the gerber files for this project probably did not support the RS274-X format. We cannot generate new gerbers for it. However, every *serious* PCB manufacturer is still capable of processing files in the RS274-D format. Our own Elektor PCB Service (https://www.elektorpcbservice.com) can import the files. You may see a few warnings, but with the help of the service provider you should be able to straighten things out and order a good board.
Regards,
Clemens