0x0C: 16 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

 0x0C_rendering_frontDipTrace 3D rendering without jumpr blocks

0x0C_backPhoto of the PCB backside

0x0C_assembledPhoto of the PCB frontside, jumper block mounted

Bill of materials

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

1(3) pcs. 48 pin (3 rows each 16 pins) male header, 2.54 mm pitch

16 pcs. jumper, 2.54 mm pitch

16 (32) pcs. resistor, form factor 1206 (SMD), optional

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

1 pcs. DS2401Z

Estimated cost

Sixteen potentiometers, headers, jumpers, and fixed resistors should not cost more than EUR 10,-.

Downloads

Schematic PDF: 0x0C_schematic

DipTrace v. 2.4 schematic file: 0x0C_schematic

DipTrace v. 2.4 PCB design file: 0x0C_ratlined

Gerber files: 0x0C_Gerber

Links

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