This was a project which took me through the whole of Yr 9 at electronics club. I planned to design and make a device for aiding the truing of wheels. The basic principle was that I would use a linear potentiometer to measure the wobbling of a wheel as it was spun in a jig. Then a serial OLED display would feedback the data and LEDs would provide information on the adjustment required to each spoke. The circuit I designed was good however did take up quite a lot of space for what it is; for example I dint even use the surface mounted PTM switches in the end. The programming I am very pleased with, as it does the job well even though I was limited to space memory wise - the drawback to using one of the original PICAXE chips. Serial commands take up a lot of memory which meant the OLED was an issue. However luckily the OLED control board has EEPROM storage on board which allows 14 commands to be saved to its memory. By doing this a lot of memory is saved with the serial commands. When the circuitry was complete I set about designing and making the jig; i have made it so it can fit a wide range of different wheels and is easy to adjust by simply turning a bolt. The red part of the circuit housing was printed from the CNC machine onto 3mm acrylic which gives the components a snug fit. In the programming, the chip stores the value each time the PTM switch by the wheel is pressed; in the end an average is calculated and then guidance given for the adjustments that must be made to the wheel. Initially i wanted to use a microswitch to trigger this every time a spoke passed but after much fiddling i could not find a way of getting it to work. All in all I am very pleased with this project and I hope to put it to good use in the future.