PCBWay 3rd PCB Design Contest

TvG Kart Data Logger v3.1 (LGT8F328P version)

TvG Kart Data Logger v3.1

This is a big improvement over the last iteration of the TvG Kart Data Logger.

With my project I aim to build a cheap data logger for Karts. (2 stroke, 4 stroke, single speed or 6 speed karts)

The professional solutions found today on the market are very expensive for those who consider karting just a hobby. Only the main unit starts form around 300 USD. Then you would have to buy all the sensors.

My project uses the minimalistic and powerful design of two LGT8F328P (basicly a 32 Mhz Arduino Nano) to log a lot of data in real time and transmit it via Bluetooth to a phone running the RachChrono app (that can be mounted on the steering wheel of the kart for live info or could be placed in the pocket for data logging only) and via a NRF24L01+ module to a hand held device that can be used by spectators (team or friends up to more than 500m away) to read the data. Also, the data is shown on a 2.42” oled display that can be mounted on the steering wheel and which has shift lights.

Data logged/transmitted:

·        Acceleration pedal position

·        Brake pedal position

·        Steering wheel position

·        RPM (from an induction sensor mounted on the lead to the sparkplug)

·        Wheel speed (either front wheel or rear wheel)

·        Current gear (for shifter karts)

·        G-forces

·        Lap time (using the magnetic strips in the track)

·        Heart rate (BPM)


The two LGT8F328P micro controllers log all this data and transmits it to a Bluetooth device running the RaceChrono app for Android. It sends the data so the app displays all of it in a user friendly interface and can be later used for analysis. Together with the GPS functionality of the RaceChrono app, the system is very robust.

The upgrade to the LGT8F328P chip is useful because of the 32 Mhz speed of the chip and the 1 real DAC converter the chip has. This makes it easier to implement the Walkie Talkie functionality.

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Aug 17,2019
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