mattvenn / extracticon

Extracticon!

• Turns on your extraction automatically when you use an attached tool,
• Cheap to build,
• 1 sided PCB easy to home fab,
• Rated at 1.8KW Max,
• Thermal cutout.

Photos

More pics

Electronics

Electronics BOM

BOM

• Parts missing from the BOM are standard resistors and LEDs.
• Ensure caps are at least 6V, preferable 12V.

Case

• Case BOM & Build notes
• DXF for laser cutting

Code

Arduino code for ATTiny45

Testing

• Circuit board is rated for 1.8KW Max.
• Current capacity can be increased by adding solder to the traces.
• We tested 2KW for 30 minutes.

This thermal picture shows maximum of 50C so internal thermal cutout set to 60C.

References

• This calculator was used to calculate that with 5mm traces we can switch 7.7A or 1.8KW at 240VAC.
• current sensing
• using tiny44/45 with arduino

License

This hardware is licensed under the CERN open hardware license 1.2, which also included in this repository.