This build by [mircemk] shows how to make one with just a few common components, an Arduino, and a bit of patience fine-tuning the PID controller. At the heart of the bot is the MPU6050 – a ...

At Maker Faire Milwaukee this past weekend, [basement tech] was showing off his latest build, a PID controlled charcoal ... there are two ways to control temperature; venting to let hot air ...