- on Computer/Software/Internet
- Published in issue 3/2008 on page 26
Data Logger “deLuxe”
The efficiency of simplicity
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.
Update: February 2, 2008
New firmware in zip file -11 (free downlolad).
- 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.
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
C1,C2,C3,C9,C10,C15 = 100nF
C4,C12 = 100?F
C5–C8 = 10?F
C11,C13 = 22pF
C14 = 5-25pF trimmer *
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
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