Hi. New to the forum. Experience previously in Autocad but have utilised LibreCad for mechanical/electrical & electronics design for some time. Background as process engineer in the dairy industry but now happily retired with lots of time on hand to develop new/cost effective systems. Utilise cad for process & instrumentation diagrams, electrical/electronic schematics, electronic PCB layouts & mechanical diagrams (electrical boxes & all mechanical layouts) Have created a library for Arduino & associated components on a 5x5 grid & saved as blocks. At present is a simple schematic but can develop with attributes. The intention would be to create a downloadable library which can be shared & updated by all (do not like re-inventing the wheel for every new design). Busy testing a humidity controller with Nano processor, real time clock, data capture of events utilising SD card for analysis. LCD display, with 5 button pushbutton input for changing displayed pages, changing setpoints, etc. Due to limited GPIO, have included GPIO expander (via I2C bus). Inputs are DHT22 temperature/humidity sensors (2 off - internal/eternal temperature/humidity). Outputs are: relay controlled for on/off control of humidifier & circulation fan. Servo control for valve position setting (either circulate or vent).
In tandem, developing a home automation system utilising SX1278 LoRa comms module (in design phase).