Another vote for epoxy putty. I've used two or three different brands, and all work seemingly about the same. My procedure would be- use mold release...
I think Max has this right, the OP is looking for controls or ladder diagramming and/or "electrical", rather than "electronic" circuit drawing tools....
Synopsis---I'm glad this engine is finished. I'm somewhat disappointed that it doesn't have a better hit and miss ratio. Biggest finding is that when...
Many of the PCB manufacturing companies offer free software. The first step in designing a PCB is to draw a schematic and all of these free programs...