Article

Speedmaster

The winning circuit in 3D

Here is the circuit voted winner of the International R8C Design Competition by Elektor Electronics readers: an intelligent 3D accelerometer that not only measures acceleration on all three spatial axes, but also calculates the total distance moved. And, as promised, a ready-assembled printed circuit board!

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Materials

070021-PCB.pdf

070021-11.zip

Component list

Resistors
R1,R2,R3 = 1kΩ
R4 = 10Ω
R5 = 4kΩ7
Capacitors
C1,C2,C4-C7,C10,C11 = 100nF
C3 = 10µF
C8,C9 = 1µF 25V
C12 = 22µF 25V
Semiconductors
D1 = 1N4001
T1 = BC547C
IC1 = MMA7260QT (Freescale)
IC2 = TS2950CT-3.3V
MOD1 = R8C/13 carrier board
Miscellaneous
K1 = 10-way SIL pinheader
S1,S2,S3 = pushbutton
LCD1 = LCD type EA DOG-M, 3 lines, with backlight
32-way socket for MOD1
Ready assembled board
070021-91, populated & tested board (except MOD1 and K1)