0x01: 8 ch Taguchi Arduino Nano adaptor

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Background

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

Function

This PCB connects to an eight channel Taguchi gas sensor array (see design 0x00) and forms the sensor excitation and data acquisition part of an electronic nose. An external Arduino Nano is needed. So is a power supply.

License terms
The 0x01 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 (length) by 50 mm (width). Double-sided.

Rendering and photos

DipTrace 3D rendering, front without components (Rev. 9)

DipTrace 3D rendering, front with components (Rev. 9)

DipTrace 3D rendering, back without components (Rev. 9)

DipTrace 3D rendering, back with components (Rev. 9)

 

Photo of the PCB frontside, components mounted (Rev. 9)

Photo of the PCB backside, components mounted (Rev. 9)

Photo of an assembled 8 ch electronic nose (Rev. 9)

Bill of materials

Minimum viable system

8 pcs. trimpotentiometer, 50k, type 3296W

1 pcs. 8-bit DIP switch

2 pcs. 15-pin female header (0.1″/2.54 mm)

2 pcs. 10-pin male header (0.1″/2.54 mm)

4 pcs. LL4007 rectifier diode, 1 kV, 1 A, DO-214 (SMD or PTH) – Grätz bridge allowing both DC and AC supplies

2 pcs. 220 uF, 16 V, electrolytic capacitor, 8.35 mm, SMD

4 pcs. 2-pin female header (0.1″/2.54 mm) – socket for external switchmode power supply module

4 pcs. 2-pin male header (0.1″/2.54 mm), two red, two black – legs for external switchmode power supply module

1 pcs. switchmode power supply module, 1.5 MHz, 3 A, type MP1584 (available on eBay)

1 pcs. barrel power jack, 2.1 mm pin, 5.5 mm barrel

 

optional

2 pcs. 15-pin male header (0.1″/2.54 mm) – breakout of all Arduino Nano pins

4 pcs. DIP-14 sockets – for digital potentiometers

4 pcs. MCP42050 dual channel digital potentiometer, SPI, DIP-14

8 pcs. 100 nF ceramic capacitor, 1206 (SMD or PTH) – decoupling of power supply

1 pcs. LED, 5 mm, PTH – power indicator

1 pcs. resistor, 715R, current-limiter for LED, PTH

 

 

Estimated cost

Terminal block connector, headers, jumpers, eight trimpots, and a capacitor should not cost more than EUR 4,-.

Downloads

DipTrace schematic PDF file: 0x01rev1_schematic

DipTrace v. 3.0 PCB design file: 0x01rev1_ratlined

Gerber files: 0x01rev1

Links

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