Data Logger “deLuxe”
The efficiency of simplicity
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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.
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Extra info / Update
Update: February 2, 2008
New firmware in zip file -11 (free downlolad).
Change log:
- Fixed spelling bug "SYTEM STOPPED" to "SYSTEM STOPPED"
- Fixed junk character displayed after the last second digit on the time text line
Correction: Febuary 9, 2009
For proper level conversion between the USB and the PIC microcontroller, the schematic and the parts list should be corrected to read:
R5,R7,R9 = 2kohm2
R6,R8,R10 = 3kohm3
These changes have been implemented in the Component List published on the project web page.
Component list
Resistors
R1 = 470 ?
R2,R11,R13,R15,R16,R17,R18,R20,R21,R22,R23 = 10k?
R3 = 22?
R4 = 56?
R5,R7,R9 = 2k?2 (corrected from: 3k?3)
R6,R8,R10 = 3k?3 (corrected from: 2k?2)
R12,R14,R19 = 1M?
R24 = 1k?
P1,P2 = 10k? preset
Capacitors
C1,C2,C3,C9,C10,C15 = 100nF
C4,C12 = 100?F
C5–C8 = 10?F
C11,C13 = 22pF
C14 = 5-25pF trimmer *
Semiconductors
D1 = 1N4001
D2,D3 = BAT81
D4-D7 = 5V1/400 mW zener diode
D8 = LED, 3 mm, red
IC1 = 7805
IC2 = TS2950-3.3
IC3 = MAX232
IC4 = PIC18F452, programmed, Elektor Shop # 070745-41
IC5 = PCF8583
Miscellaneous
S1,S2,S3 = miniature push button
JP1 = 2-way SIL pinheader with jumper
K1 = 2-way PCB-mount screw terminal block, 5mm lead pitch
K2 = 8-way SIL pinheader
K3 = 9-pin PCB-mount sub-D socket (female)
K4 = SD card connector
X1 = 32.768 kHz quartz crystal
X2 = 20 MHz quartz crystal
BAT1 = CR2032 Lithium battery
LCD = LCD display with 4 lines of 16 characters, e.g. DEM 16481
PCB, ref. 070745-1
Kit of parts, Elektor Shop # 070745-71
Project software (source code, hex file, PC program), file # 070745-11
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