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CAN Tester

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CAN Tester
The circuit described here has all the features required for conducting various experiments and tests on a CAN bus. In addition there is the option of connecting the tester to an existing CAN bus to monitor the data or to track down faults.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor 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.

COMPONENT LIST
Resistors
R1,R2,R5–R8 = 1kOhm
R4,R11 = 10kOhm
R3,R9,R10 = 120Ohm
R12 = 330Ohm
P1 = 10kOhm trimpot, e.g. Bourns 3386P-1-103LF, Newark / Farnell # 9355030
Capacitors
C1–C4 = 22pF
C5–C9 = 1µF 63V radial
Semiconductors
D1–D6 = LED, red, 3mm
IC1 = ATmega8515-16PC, programmed, Elektor Store # 120195-42a for board A, # 120195-42b for board B
IC2 = MAX232ACPE
IC3 = PCA82C250 (8-pin DIP) or PCA82C250T (SO8, adapter board required)
IC4 = SJA1000 (28-pin DIP) or SJA1000T (SO28, adapter board required)
Miscellaneous
X1 = 8MHz quartz crystal
X2 = 16MHz quartz crystal
LCD1 = LCD, 4x20 characters (Elektor Store # 120061-73)
K1 = 16-pin pinheader, 0.1’’ pitch
K2 = 6-pin (2x3) pinheader, 0.1’’ pitch
K3–K6 = 3-pin pinheader, 0.1’’ pitch, with jumper
K7 = 9-way sub-D socket, right angled pins, PCB mount
K8,K10 = 2-way PCB screw terminal block, 0.2’’ pitch
K9 = 2-pin pinheader, 0.1’’ pitch, with jumper
S1–S5 = miniature pushbutton with make contact, e.g. TE Connectivity 3-1437565-0, Newark / Farnell # 2060813
PCB # 120195-I, see [1]
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