Tag Archives: sensor

AVR basics: Using cheap ultrasonic rangefinders

As part of my cunning plan to develop ‘smart’ sensors, I’ve been playing around with infrared rangefinders (and may do a post on those soon). But the first kind of rangefinder I ever tried was the ultrasonic type, so it was time to reacqauint myself. And, in particular, I wanted to see if I could do this on the cheap…. Read more »

ESP8266 IoT room thermometer – part 2

Having cobbled together an ESP8266 microcontroller, temperature sensor and TFT LCD screen, the next step was to have the device talk to a server. There are two reasons for wanting to connect to a server: first, to get time and date updates; and second, to report the temperature and humidity so that the server can display them on an intranet… Read more »

ESP8266 IoT room thermometer – part 1

Impulsiveness is not always a good thing. So here’s a handy rule for you: first, prototype; then fabricate the PCBs. Doing it that way, things have a chance of going well. Reverse that order and … well, not so much. Not that it was a disaster. In fact I had prototyped this little project – mostly. But we’re getting ahead of ourselves…. Read more »