FidoCadJ vs. Eagle: Lightweight Tools for Hobby Electronics

How to Convert Your Hand Sketches into FidoCadJ Diagrams

1. Prepare your sketch

• Clean: Erase stray marks; darken lines and labels.
• Label: Add reference designators (R1, C1), net names, component values.
• Scale: Note approximate sizes (grid units or mm) if important.

2. Install and open FidoCadJ

• Download and run FidoCadJ for your OS from its official site. Create a new schematic file and set grid/snapping to a convenient spacing (commonly 0.5–1.0 mm or 0.1–0.2 inch equivalent).

3. Set grid and units

• Grid: Choose grid spacing that matches the density of your sketch.
• Snap: Enable snapping for straight wires and aligned components.
• Units: Use millimeters for PCBs, or leave generic grid units for simple schematics.

4. Place components

• Use the component palette to add symbols (resistors, capacitors, ICs, headers).
• If a symbol is missing, use primitive shapes or import/create custom symbols (see step 8).

5. Draw wires and connections

• Use the wire tool to trace nets from your sketch.
• Add junction dots where three or more wires meet; avoid ambiguous crossings.

6. Add labels and values

• Place text for component values, net names, and notes. Use consistent font size and positioning to match your sketch clarity.

7. Align and tidy

• Use the grid to align parts; straighten wires and space components evenly.
• Use undo/redo while refining; keep the schematic readable rather than space-minimal.

8. Create or import custom symbols (if needed)

• Open the symbol editor to draw custom parts using primitives and save them to a library.
• Alternatively, import existing FidoCad or FidoCadJ symbols from community libraries.

9. Verify connectivity

• Check that all nets from your sketch are represented and that pins are connected to intended nets. Use visual inspection and the netlist export (if needed) to confirm.

10. Export and iterate

• Export the diagram as FCD (native) and as PNG/SVG/PDF for sharing or printing.
• If creating a PCB, export to formats accepted by your PCB workflow or convert with available tools.

Quick tips

• Work in layers: Keep silkscreen-like labels separate from wiring if you plan PCB conversion.
• Use keyboard shortcuts: Speeds drawing—learn common keys for component placement and wiring.
• Copy/paste subcircuits: For repeated sections (power rails, connectors).
• Save versions: Keep iterative files (sketch→v1→v2) so you can revert.

If you want, I can convert a photo of your sketch into a FidoCadJ diagram—upload the image and I’ll produce a cleaned schematic and FidoCadJ file.