About the article

Wheelie GT

Gear tooth sensing improves handling

Wheelie GT
It’s been over a year since we introduced the Elektor Wheelie (a self balancing single axle vehicle). Now the GT modification described here senses the speed of each road wheel to give better stability and improved performance over uneven terrain.
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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.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list

Signal processor board with ATMega8


R1,R2 = 4.7k?

R3 = 10k?


C1,C2 = 10nF

C6,C7 = 27pF (or 22pF)

C3,C8 = 100nF


D1 = 1N4148

IC1 = ATMega8-16PI, programmed)


X1 = 16MHz quartz crystal

K1 = 4-pin pinheader

K3,K4 = 3-pin pinheader

K2 = 6-pin (2x3) pinheader

PCB no. 100479-1*

Sensor board
R1 = 10kOhm
C1 = 100nF
IC1 = ATS665 (or ATS667, see text)
K1 = 3-pin pinheader
PCB no. 100479-2*

*A kit of parts containing signal processing board (100479-1), two sensor boards (100479-2) and all components is available from the Elektor ShopTarjeta de sensor

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