How to design Electronics devices ?

For designing an Electronics device, firstly you should be clear with your idea regarding what purpose the device is for, how to make it work. Plan it out and daraw figures if required. Mainly draw the electronic circuit  schmatically, which is to be used. make all the aparatus available with you. Also design the 3D look of your device and orthograpic projection if required.Accordingly make the circuit as in the diagram. Be careful while doing the connections.Make Program for your devices (Microcontroller) which will make it do the particular work. Check and debug your program.Upload the data (program) to the components like ardieuno or motor driver or bluetooth chip etc.design your electronic device model. Try to make it convenient, eco friendly. It should also be resistive durable.Fit in your circuit in the 3D model. Make the device completely ready and then have trails of working and if present remove the bugs.