Not sure if fully relevant to the original post, but wanted to add as another example of case design for the eggfinder products. Someone had mentioned making a case to hold two LCD receivers to be used for both GPS and telemetry.
The case is a commercial ABS plastic project box. Momentary push button switches on the left and right sides for each LCD receiver. Locking push button switches on the top for power, backlight, and RST for each, as well as for the bluetooth module on the GPS receiver. DPDT switch controls master ON/OFF/Charge and another for selecting which LCD receiver is connected to the voice module (3.5 mm jack accessible from the top) so can listen to either the tracking data or the telemetry data. Two openlogs record the data received by each for analyzing in case there is an in-flight anomaly and the data can't be obtained from the GPS transmitter or eggtimer quantum/proton/etc itself, and the micro SD card is easily accessible.
Power is from a 2S 4 Ah lipo battery, which should easily handle the added load if using the backlight x2 and bluetooth at the same time. Connectors for power and data/programming are the serial and Ethernet ports at the front. The Ethernet connection has the ground, 3.3 V, RXD, and TXD for each LCD receiver. The serial port has all 5 battery connections and the aux connections on the voice module. All programming of GPS and telemetry transmitters, firmware updates of the LCD receivers, and battery charging can be done without opening the case.
My dremel work isn’t the best so the through holes have some gaps, but it’s functional as a dual base station. I don’t have a photo of the inside but imagine the worst wire nest when they try to diffuse a bomb in action movies! My goal for this was to have as much functionality without having to open the case, so making the inside organized wasn’t top priority (next rainy day project). I also need to put the eggtimer decal on it!
