It has taken a while to get to this point but, now the focus is back on rt-ai Edge, it is time to get the ZeroSensors sorted out properly. The design above is the prototype 3D printed case. It’s a free standing case, about 3 inches by 2.7 inches and 1.4 inches deep. The biggest problem with these things is getting thermal isolation so that the temperature reading is from the outside air rather than Raspberry Pi Zero heated air. The big baffle on the rear (on the right of the image above) is intended to keep the air separate in the two halves. The little slot is to allow four thin cables to run between the Pi and the sensor boards. Right now the back has no holes so that air flow is fully bottom to top convection on both the sensor side and the Pi side. However, this might need to be changed if the initial design doesn’t work. The plastic material will conduct heat so it may be necessary to add more thermal isolation using holes or slots in the back.