0x03: 16 ch Taguchi gas sensor array

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Background

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

Function

This PCB breaks out the connections to sixteen Taguchi type gas sensors and effectively forms an array of sensors; the sensor part of an electronic nose.

License terms
The 0x03 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 100 mm (height). Double-sided.

Rendering and photos

DipTrace 3D rendering, back without components (rev. 4)

 

DipTrace 3D rendering, front with components (rev. 4)

 

DipTrace 3D rendering, front without components (rev. 5)

 

DipTrace 3D rendering, front with components (rev. 5)

 

Photo of the PCB frontside, components mounted (rev. 5). The lower row components are experimental filter capacitors

 

Photo of the PCB backside, sockets mounted (rev. 5)

 

Bill of materials

16 pcs. Taguchi gas sensor socket, 6-pin

16 pcs. Taguchi gas sensor

16 pcs. MOSFET, IRLML2502, logic-level N-channel, form factor SOT-23

16 pcs. gate-current limiter, 100R, form factor 1206

16 pcs. pull-down resistor, 10k, form factor 1206

16 pcs. flyback biode, BAS32L, form factor mini-MELF

2 pcs. 20-pin header

optional

16 pcs. resistor, form factor 1206

16 pcs. zero-ohm resistor, PWM bypass, form factor 1206

 

Estimated cost

Sixteen Taguchi gas sensors, sixteen sockets, MOSFETs, resistors, diodes, and two twenty-way connectors should not cost more than EUR 40,- depending on the type of sensors.

Downloads

Schematic PDF (sockets only, rev. 4): 0x03rev4-schematic

Schematic PDF (sockets and MOSFETs, rev. 5): 0x03rev5-schematic

DipTrace v. 3 schematic file (sockets only, rev. 4): 0x03rev4-schematic

DipTrace v. 3 schematic file (sockets and MOSFETs, rev. 5): 0x03rev5-schematic

DipTrace v. 3 PCB design file (sockets only, rev. 4): 0x03rev4-ratlined-public

DipTrace v. 3 PCB design file (sockets and MOSFETs, rev. 5): 0x03rev5-ratlined-public

Gerber files (sockets only, rev. 4): 0x03rev4

Gerber files (sockets and MOSFETs, rev. 5): 0x03rev5

 

Sensor datasheet, HW Sensor: MQ-2

Sensor datasheet, HW Sensor: MQ-3

Sensor datasheet, HW Sensor: MQ-4

Sensor datasheet, HW Sensor: MQ-5

Sensor datasheet, HW Sensor: MQ-6

Sensor datasheet, HW Sensor: MQ-7

Sensor datasheet, HW Sensor: MQ-8

Sensor datasheet, HW Sensor: MQ-9

Sensor datasheet, HW Sensor: MQ131

Sensor datasheet, HW Sensor: MQ135

Sensor datasheet, HW Sensor: MQ136

Sensor datasheet, HW Sensor: MQ137

Sensor datasheet, HW Sensor: MQ138

Links

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