The aim of the device is to control the temparature inside small battery-powered inclubator. The main temperature stabilization is provided via PID (proportional-intefral-differential) control loop function. The use of PID instead of simple relay control provides high level of stability of temerature control.
This is the view of Printed Circuit Board of Portable Incubator (first version)
This is the second version of prortable incubator with more functions and slim design: