2. Soldering the headers
Before using your click
™
board, make sure
to solder 1x8 male headers to both left
and right side of the board. Two 1x8 male
headers are included with the board in
the package.
1
3
Air quality
click
1. Introduction
™
2
4. Essential features
Air quality click
™
is suitable for detecting
ammonia (NH
3
), nitrogen oxides (NOx)
benzene, smoke, CO
2
and other harmful or
poisonous gases that impact air quality. The
MQ-135 sensor unit has a sensor layer made
of tin dioxide (SnO
2
), an inorganic compound
which has lower conductivity in clean air
than when polluting gases are present. Air
quality click
™
also contains a potentiometer
that lets you adjust the sensor for the
environment you’ll be using it in.
Turn the board upside down so that
the bottom side is facing you upwards.
Place shorter pins of the header into the
appropriate soldering pads.
Turn the board upward again. Make sure
to align the headers so that they are
perpendicular to the board, then solder
the pins carefully.
Air quality click
™
is a simple solution
for adding a high sensitivity sensor for
detecting a variety of gases that impact
air quality in homes and offices. The board
features an MQ-135 sensor, a calibration
potentiometer, a mikroBUS
™
host socket,
two jumpers and a power indicator LED.
Air quality click
™
communicates with the
target board through mikroBUS
™
AN (OUT)
line. Air quality click
™
is designed to use a
5V power supply only.
3. Plugging the board in
Once you have soldered the headers your
board is ready to be placed into the desired
mikroBUS
™
socket. Make sure to align the
cut in the lower-right part of the board
with the markings on the silkscreen at the
mikroBUS
™
socket. If all the pins
are aligned correctly, push the
board all the way into the socket.
click
www.mikroe.com
Air quality click Manual
™
BOARD
ver. 1.00
0 100000 026588
5. Air quality click
™
board schematic
6. Calibration potentiometer
VCC
VCC
VCC
To calibrate Air quality click
™
for optimum
performance, use the on-board potentiom-
eter to adjust the load resistance on the
sensor circuit.
R1
2K2
A
H
A
B
H
B
Analog output
7. Code examples
AN
RST
CS
SCK
MISO
MOSI
+3.3V
GND
PWM
INT
TX
RX
SCL
SDA
+5V
GND
PWR
MQ-135
R2
10K
Once you have done all the necessary
preparations, it’s time to get your click
™
board
up and running. We have provided examples
for mikroC
™
, mikroBasic
™
and mikroPascal
™
compilers on our
Libstock
website. Just
download them and you are ready to start.
MIKROBUS DEVICE CONN.
P1
10K
.com
8. Support
MikroElektronika offers
free tech support
(www.mikroe.com/support)
until the end
of the product’s lifetime, so if something
goes wrong, we’re ready and willing to help!
MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that may appear in the present document.
Specification and information contained in the present schematic are subject to change at any time without notice. Copyright © 2014 MikroElektronika. All rights reserved.
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