0x0C: 32 ch Taguchi array sensitivity selector

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Background

Please see the e-nose project page for an elaborate description as well as practical examples.

Function

This PCB sets the load resistance for sixteen Taguchi type gas sensors and is used for sensitivity adjustment. Fixed resistors allow for conveniently programming selected sensitivity ranges. Trim potentiometers allow for precise adjustment.

License terms
The 0x0C design is published under the Creative Commons Unported 3.0 License.  I do not profit from this design, neither should you. You are welcome to adapt, modify, and redistribute this design as long as the license terms are respected.

Physical size of PCB

100 mm (width) by 50 mm (height). Double-sided.

Rendering and photos

 DipTrace 3D rendering, frontside without components

 

Photo of the assembled PCB

 

Bill of materials

16 pcs. trim potentiometers, 50k, form factor 3296 W

 

1 pcs. 80-pin (2 rows each 40 pins) 2.00 mm pitch male header, angled 90°

1 pcs. DS2401Z

Estimated cost

Sixteen potentiometers and a header should not cost more than EUR 5,-.

Downloads

Schematic PDF: 0x0Crev1_schematic

DipTrace v. 3 schematic file: 0x0Crev1_schematic

DipTrace v. 3 PCB design file: 0x0Crev1-ratlined-public

Gerber files: 0x0Crev1

Links

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