- on Test & Measurement
- Published in issue 9/2003 on page 0
Precision Measurement Central, Part 2
printed circuit board and software suite
First, however, we need to ‘wrap up’ the hardware side of things. In the previous issue (July/August 2003) we discussed the operation of the MSC1210 controller board along the lines of its circuit diagram. For lack of space in the first instalment we could not include the layout of the double-sided printed circuit board and the associated component lists. With a ‘thank you for your patience’ to many dedicated readers we can now print these two items, see Figure 1.
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.
R1,R2,R3,R12,R13 = 4k?7 
R4,R5,R10 = 47? 
R6,R7,R11,R14 = 1k? 
R8,R9,R17,R18,R20,R21 = 100k? 
R15,R16 = 4 x 1k? , resistor array
R19 = 10? 
C1,C4,C11,C16,C17,C18 = 470nF , V? 16V
C2,C3,C6,C9,C10,C12 = 100nF 
C5,C7 = 10pF 
C8 = 1nF 
C13 = 2µF2 , V? 16V
C14,C15 = 4 x 100nF (or 47nF) , capacitor array
C19,C20,C21 = 10µF 6V3
L1 = 100µH  Rd <10?
D1 = GF1M [DO214]
D2,D3 = BZX84 [SOT23], 9V1
D4,D5 = BZX84 [SOT23], 4V7
D6 = BAW56 [SOT23]
D7 = LED, red, 
T1 = BC857B
IC1 = MAX810 or similar
IC2,IC61 = 78L05 [SO8]
IC3 = MAX 487ECSA, 485, SN75176 or equivalent RS485 converter
IC4 = MSC1210 Y4 (Texas Instruments)
IC5 = 74HC14ADT [TSSOP14]
K1 = 10-way boxheader
K2 = 9-way sub-D plug (male), angled, PCB mount
K3 = 4-way PCB terminal block, lead pitch 5mm
K4 = 14-way pinheader (2 rows)
K5 = 34-way pinheader (2 rows)
J1,J2,J3 = jumper, 2-way, lead pitch 5mm
X1 = 11.0592MHz quartz crystal, miniature
S1 = SMD pushbutton
Order code for ready-stuffed and tested board: 030060-91.