Show HN: I made a tool to communicate data using the PC speaker
As part of my undergraduate course we had to build an embedded system that did this, at a high baud rate, with a transmitter and receiver. It was the most ridiculously difficult project I have ever undertaken. Finished the transmitter but there was something wrong with part of our analogue circuit and it gave the signal an artefact. I wrote the assembly in a day (oh yeah we used assembler and burned an EPROM I think) but the hardware assignment was Walt Disney level fantasy.<p>I believe zero people on the course got it fully working.<p>I spent almost every spare hour I had in that lab for ten weeks. And despite it being insanely difficult, I learnt something that semester. I learnt that I would never, ever, work in hardware.