Morsegeocache

thingiverse

In this box fits an Arduino Nano (without pins), a bright LED light, and you can also add a clever head. You can easily program the Nano to send Morse code messages, so that the LED flashes out coordinates in the form of bright light signals, using the classic Morse alphabet. The slot on the bottom is used to plug in a USB cable so that you don't have to rely on a power source at all. This cable must be brought by the cachers themselves, preferably with a fully charged portable power bank. The box serves as an essential intermediate station, because there is simply no room for a logbook inside. It's quickly fastened with flexible cable ties. To prevent theft, you place the tie between the roof and any button that might be present. To secure the cover in place, use small screws and screw them tightly into the pre-drilled holes.