Another build for 'From Shadows', this time they wanted a device that could be used to track down other devices scattered around the field. I came up with a solution that used the ESP8266 to create a wifi network (nodes not shown) and these gadgets that scanned for wifi networks and reported the RSSI. The closer you are the stronger the signal strength and you know you're heading in the right direction.
The gadgets were supposed to have a modern mystical feel so I made them from fluorescent perspex, the sheet was sprayed with black and the details cut through. The whole front panel was lit from behind with UV led's so the glow only shone through the cuts. I also felt it would be good if the gadgets had to be held in both hands, under the thumb prints are two tactile switches which need to be firmly pressed to keep the device on. I think this might have caused a bit of thumb ache from the players while they were initially looking for the nodes, it certainly made taking a photo of the screen difficult.
The screens displayed information about the nodes being searched for. When the node wasn't in range the gadgets showed the internal time (this proved to be very useful as the gadget time drifted away from the real world time). When the nodes were in range the gadgets showed four 'readings' of mystical energy, but only at specific times of the day (hence the rtc). I think it worked moderately well, the batteries lasted the duration in both gadgets and nodes and readings were supplied at near enough the right times.
The whole thing was vacuum formed again for waterproofing and sturdiness.