The BOM on [Jeremy S Cook]’s build is extremely short – just a PIR sensor and an optoisolator, with a battery, a plug for the camera’s remote jack, and a 3D-printed bracket. The PIR sensor ...

If you just got your hands on a shiny new Android phone and are looking for a fun project ... simple as you might expect. A photocell and TMP36 temperature sensor are connected to the Arduino ...