The very first step after the requirements of the product are established is, of course, creating the schematic for the electronic assemblies.
Since I use Altium to create the circuit diagrams I can deliver very readable schematics in a hierarchical design, containing potential sub circuits over several depth classes to create not only an easily readable schematic diagram but also a block diagram that you could use for documentation purposes or to put it into your users manual.
The color scheme used ensures easily readable schematics, both printed and on screen and I try to always layout the design in a way, that the signal/current flow is easily understandable. Take a look at the very simple example picture on this page. It shows a simple tube headphone amplifier. The signal enters from the left, through the RCA Jack J1A, through the coupling capacitor and the volume potentiometer and reaches the preamplifier tube V2A. Leaves at the anode, travels to the SRPP couple V1A and V1B on the right and heads off over the big capacitor C3 to the headphones. Easy as that.
My experience in schematic design involves (among others):
- Analog Electronics, both solid state and vacuum tube circuits
- Various Power Supply topologies - From linear over buck/boost to flyback - using specialized integrated circuits as well as schematics from discrete parts.
- Digital logic circuits
- Ethernet Interfaces