Interfacing the HC-SR04 ultrasonic distance sensor and the STM32F0 Discovery board!

A few months back, I bought myself a cheap SR04 ultrasonic rangefinder (Datasheet: http://goo.gl/LBZeDG), as per off the magical eBay (Example – Link will expire: http://goo.gl/h9j79O). As you can imagine, these things are ridiculously cheap at a mere 99p inc. p+p. How that is even profitable, I’ll never know! They’re actually pretty nice devices and allow for […]