With the delay from lightening to thunder, the small flash inside my CE device actually came first; followed by me wondering “what the hell was that?”; then the thunder and pretty shortly after was my realisation of what had just happened; followed by my expletive of choice. I am SO glad that I forked out [...]
Up to this point, for my embedded SPARK entry, I have been playing with the embedded sensors, actuators and micro-controllers for the Control Stations and RC Cars. Time to get serious about the core code for the Control System (which, incidentally, is what I will largely be assessed on). Before I can start developing in [...]
Physical Setup The hardware to build a quadrature encoder is pretty simple. For the sensors, you need a couple of photo-interrupters and something to do some very lightweight logic and timing calculations (in my case the Arduino). The encoder is a slotted disk, with equal length and spacing of “light” and “dark”, which rotates through [...]