0x00: 8 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 eight Taguchi type gas sensors and effectively forms an array of sensors; the sensor part of an electronic nose.

License terms
The 0x00 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, front without headers (rev. 5)

 

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

 

DipTrace 3D rendering, front without components (rev. 6)

 

DipTrace 3D rendering, front with components (rev. 6)

 

DipTrace 3D rendering, front with headers (rev. 6)

 

Photo of the PCB frontside, headers mounted (rev. 5)

 

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

 Photo of the PCB frontside, components mounted (rev. 6)

 

Bill of materials

8 pcs. Taguchi gas sensor socket, 6-pin

8 pcs. Taguchi gas sensor

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

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

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

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

2 pcs. 10-pin header

optional

8 pcs. resistor, form factor 1206

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

 

Estimated cost

Eight Taguchi gas sensors, eight sockets, and two ten-way connectors should not cost more than EUR 20,- depending on the type of sensors.

Downloads

Schematic PDF (rev. 5, sockets only): 0x00rev5-schematic

Schematic PDF (rev. 6, sockets and MOSFET): 0x00rev6-schematic

DipTrace v. 3 schematic file (rev. 5, sockets only): 0x00rev5-schematic

DipTrace v. 3 schematic file (rev. 6, sockets and MOSFETs): 0x00rev6-schematic

DipTrace v. 3 PCB design file (rev. 5, sockets only): 0x00rev5-ratlined-public

DipTrace v. 3 PCB design file (rev. 6, sockets and MOSFETs): 0x00rev6-ratlined-public

Gerber files (rev. 5, sockets only): 0x00rev5

Gerber files (rev. 6, sockets and MOSFETs): 0x00rev6

 

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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