Arduino 37 Sensor Kit

First acquaintance
Lecturer Dr. Samuel Kosolapov
General Appearance: ~ 36+1 modules in one box

In this presentation only simple (even primitive) modules will be explained and demonstrated

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Leaflet inside the box

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Leaflet inside the box: Arrangement of modules

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 List of Modules in the box: KY-0XY
- 1 x Small passive buzzer module KY-006 - 1 x Class Bihor magnetic sensor KY-035
- 1 x 2-color LED module KY-011 - 1 x Magic light cup module KY-027
- 1 x Hit sensor module KY-031 - 1 x Rotary encoder module KY-040
- 1 x Vibration switch module KY-002 - 1 x Optical broken module KY-010
- 1 x Photo resistor module KY-018 - 1 x Detect the heartbeat module KY-039
- 1 x Key switch module KY-004 - 1 x Reed module KY-025
- 1 x Tilt switch module KY-020 - 1 x Obstacle avoidance sensor module KY-032
- 1 x 3-color full-color LED SMD modules KY-009 - 1 x Hunt sensor module KY-033
- 1 x Infrared emission sensor module KY-005 - 1 x Microphone sound sensor module KY-038
- 1 x 3-color LED module KY-016 - 1 x Laser sensor module KY-008
- 1 x Mercury open optical module KY-017 - 1 x 5V relay module KY-019
- 1 x Yin Yi 2-color LED module 3MM KY-029 - 1 x Temperature sensor module KY-001
- 1 x Active buzzer module KY-012 - 1 x Temperature sensor module KY-028
- 1 x Temperature sensor module KY-013 - 1 x Linear magnetic Hall sensors KY-024
- 1 x Automatic flashing colorful LED module KY-034 - 1 x Flame sensor module KY-026
- 1 x Mini magnetic reed modules KY-021 - 1 x Sensitive microphone sensor module KY-037
- 1 x Hall magnetic sensor module KY-003 - 1 x Temperature and humidity sensor module KY-015
- 1 x Infrared sensor receiver module KY-022 - 1 x XY-axis joystick module KY-023
- 1 x Metal touch sensor module KY-036

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 Problem: Random Arrangement inside the box:

Modules are not arranged as in this picture.

First exercise is to arrange modules
in accordance with this picture

THIS IS NOT A TRIVIAL JOB !!!

Visual difference between some modules is very small.

(Remember Find 2 differences games for children ?
Small details (like holes position)
must be taken into account.

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 What is the difference ?
(KY number is not present on the board )
Arduino KY-012 Active
Arduino KY-006 Small
buzzer module
passive buzzer module

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 Simple electronic test (demonstrate)
Connect Pin - to GND
Connect Pin S to +5V
Active buzzer module
Middle Pin: is not important
passive buzzer module will produce constant tone
will shortly click

Execute live test

only after you get
proper explanations

Details and usage later

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 Useful tool for EE: Magnification lens

To see in a clear way

small letters and pin numbers

Some elements of the sensors

can be bend in an inappropriate way.
Gently unbend (or ask lecturer in case of doubts)
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 Problem: No serious documentation
The problem with finding the data sheet
is due to the fact that the name
on the controllers board KEYES
is the name of the board manufacturer
who does not specify his board anywhere
However, short module description + examples can be found:
Their reference for the product is: https://tkkrlab.nl/wiki/Arduino_37_sensors
318-ENC130175F-12PS (Unfortunately, this site is
The data sheet is just one page Google Translation from Chinese,
but it does describe the PIN_OUTS. so some creativity is needed to understand
what does this means

One of the goals of students presentations:

Create some documents and examples
Hint: use KY-xxx to find youtube videos and exemplary projects

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Primitive Sensor: Switch
37 Sensor Kit contains a number of primitive sensors which are actually operates as a
mechanical switch. Despite primitive design , those modules sense important events.

In some cases operation of the switch sensors can be demonstrated by measuring

resistance between S and GND pins

Pin - : Connect to Arduino GND

Middle pin : Connect to Arduino +5V
Pin S : Connect to Arduino Digital pin configured to INPUT

Between Pin S and Middle Pin (+5V) there is

10 k Pull-up resistor

Pull-Up resistor. Reminder:

It is assumed that input impedance
of the circuit connected to Pin S is high
and has no influence on the Pin S voltage.
When switch is OFF, pin S has 5V (HIGH)
When switch is off, Pin S is connected to the Ground
Pin S is LOW
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 Primitive Sensor: KY-004 Mechanical Key Switch

Pin - : Connect to Arduino GND

Middle pin : Connect to Arduino +5V
Pin S : Connect to Arduino Digital pin configured to INPUT

Between Pin S and Middle Pin (+5V) there is

10 k Pull-up resistor

Warning: Image is differ

from real switch (mirror)

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Example of Mechanical Key Switch Test
Pin S of the switch connected to (say) Pin 8 of the Arduino Board

Circuit operation:
LED13 is normally OFF
When the button (key) is pressed, LED13 is ON

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Example of Mechanical Key Switch Test
Pin 10 (and not 8) is used in this example

No DEBOUNCING in this example !!!

(Human eye will average LED intensity changes

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 KY-021 Mini magnetic reed switch

Pin - : Connect to Arduino GND

Middle pin : Connect to Arduino +5V
Pin S : Connect to Arduino Digital pin
configured to INPUT

Between Pin S and Middle Pin (+5V)

there is 10 k Pull-up resistor

The code is as with simple button/key switch

Switch is Normally OPEN.
When exposed to magnetic field switch get closed Discuss usage in the industry and at home.
(Hidden lock (open with magnet.
(Demonstrate with tester and small magnet) Door with magnet: is the door open ?

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 KY-021 Mini magnetic reed switch
Small
magnet

The shell of a reed switch is commonly a

sealed glass pipe
in which
two iron elastic reed electroplates are equipped
and inert gases are filled.
Normally, the two reeds are separated.
However, when a magnetic substance (for example, small magnet)
approaches the glass tube,
the two reeds in the glass tube are magnetized and attract each other
As a result, the two reeds will pull together
creating electrical contact
After external magnetic force disappeared,
the two reeds will be separated with each other
because they have the same magnetism,
then the circuit is disconnected.

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 KY-020 Tilt switch

Pin - : Connect to Arduino GND

Middle pin : Connect to Arduino +5V
Pin S : Connect to Arduino Digital pin
configured to INPUT

Between Pin S and Middle Pin (+5V)

there is 10 k Pull-up resistor

Switch is Normally OPEN. The code is as with simple button/key switch

When oriented upwards, the switch is closed.
Inside: a small ball that moves when orientation changes Discuss usage in the industry and at home.
(Demonstrate with tester) (Theft protection ?
Alarm when object is moved ?

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 KY-002 Vibration switch

Pin - : Connect to Arduino GND

Middle pin : Connect to Arduino +5V
Pin S : Connect to Arduino Digital pin
configured to INPUT

Between Pin S and Middle Pin (+5V)

there is 10 k Pull-up resistor

A shock switch also called

vibration switch, spring switch or shock sensor,
is an electronic switch. The code is as with simple button/key switch
It contains conductive vibration spring.
Switch is normally open. Discuss usage in the industry and at home.
When vibrated, switch is closed.

Operation of this module cannot be demonstrated by using multimeter

(too slow)
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KY-031 knock/tap switch
Pin - : Connect to Arduino GND
Middle pin : Connect to Arduino +5V
Pin S : Connect to Arduino Digital pin
configured to INPUT

Between Pin S and Middle Pin (+5V)

there is 10 k Pull-up resistor

The code is as with

simple button/key switch

Discuss usage in the industry and at home.

Operation of this module cannot be

demonstrated by using multimeter
(too slow)

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KY-017 Mercury tilt switch
Pin - : Connect to Arduino GND
Middle pin : Connect to Arduino +5V
Pin S : Sensor Out

Additionally
there is 10 k Pull-up resistor and LED

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KY-017 Mercury tilt switch
The code is as with
simple button/key switch

Discuss usage in the industry and at home.

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 Simple Actuators
37 Sensor Kit contains a number of simple ACTUATORS like LED, Buzzer.

In some cases operation of these modules can be demonstrated by

applying +5V to relevant pins (do not forget about GND, however)

The simplest usage of these modules is to signal to human operator that something happen

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LED as actuator.
We already know
how to operate Flashing LED
on the Pin13 of the Arduino Board

The trivial usage of the LEDs is to send to human operator simple predefined messages.
For example Power is ON; Serial communication is going on

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LED as actuator.

LED can be easily connected to Arduino.

BUT: As LED as Arduino board can be damaged in some cases.
Do not connect LEDs before checking voltages and currents.
Details later

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 KY-016 3-Color 5V RGB LED Module.
For some reason
known to producer only :
R == B
G == G
B == R

Demonstrate direct connection of R, G, B pins to 5V. Pin - to GND.

Safe, because protection resistors are on the module.
RGB trichromatic limiting resistor to prevent burnout

Advanced usage with PWM and analogWrite will be explained later

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KY-009 3-Color 5V RGB SMD LED Module.

You can't connect the led's directly to the Arduino

You will need resistors!!
Arduino pin 9 > 180 Ohm resistor > Pin 'R' of KY009 module
Arduino pin 10 > 100 Ohm resistor > Pin 'G' of KY009 module
Arduino pin 11 > 100 Ohm resistor > Pin 'B' of KY009 module

No demonstrations
Students will not get this module (no reason)

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KY-011 Two color LED 5mm .
Color: Green + Red
Diameter: 5mm
Case Color: None
Package Type: Diffusion
Voltage (V) :2.0-2.5v
Using a current (MA): 10
Viewing angle: 150
Wavelength (NM): 571 +644
Luminous intensity (MCD) :20-40; 40-80
Stent type: long-legged
330 Ohm resistor is needed
DO NOT USE

No demonstrations
Students will not get this module (no reason)

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KY-029 Two color LED mini 3mm diam.
Color: Green + Red
Diameter: 3mm
Case Color: None
Package Type: Diffusion
Voltage (V) :2.0-2.5v
Using a current (MA): 10
Viewing angle: 150
Wavelength (NM): 571 +644
Luminous intensity (MCD) :20-40; 40-80
??? Ohm resistor is needed
DO NOT USE

No demonstrations
Students will not get this module (no reason)

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KY-034 7-color Automatically Flashing LED
The module contains a 7-color 5mm LED
with a built-in chip
that sequentially flashes each color in turn.
Color pattern is repeated in about 15 seconds.
LED model: YB-3120B4PNYG-PM
Forward voltage: 2.5V - 6V
Forward current: 40mA

Use as fancy ALARM.

Mind 15 sec time needed to see all the colors

Demonstrate by direct connection.

Attention: GND is Middle pin !!!

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KY-008 Laser Diode 650 nm

Laser Diodes are widely used in electronics

BUT: Students will not get Laser Diode

Because this device is really dangerous.

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KY-006 Passive Buzzer and KY-012 Active Buzzer
Passive buzzer has black bar

The seal can be removed

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KY-006 Passive Buzzer and KY-012 Active Buzzer
Passive buzzer has passive Active buzzer has piezo element and
piezo element inside additional oscillator inside
More expensive, but simpler for usage

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 KY-006 Passive Buzzer and KY-012 Active Buzzer
Passive Buzzer
Can be used as Primitive Speaker Active Buzzer
with limited frequency range) Can be used as very simple ALARM

Pin (-) : GND Pin (-) : GND

Pin (S) : Signal Pin (S) : Signal
Middle pin is NOT USED Middle pin is NOT USED

Connect S to pin producing signal of different When DC (or Pin having 5V or 3.3V)
frequencies Buzzer will produce sound is connected to S signal of
constant frequency is heard
Generally square wave (up to ~ 5K)
generated by digital pin is used.

When DC (5V) is connected to S

Only short click is heard.

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 KY-012 Active Buzzer
Active Buzzer
Can be used as very simple ALARM together with LED13

Pin (-) : Connect to GND

Pin (S) : Connect to (say) Pin 12
Middle pin is NOT USED

When Pin12 is low nothing happened

When Pin12 is HIGH ALARM is heard

More sophisticated usage of active buzzer

with PWM will be discussed later

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 KY-006 Passive Buzzer
Passive Buzzer can be used as a cheap alternative to speaker
BUT: Useful frequency range is limited

For UNO:
tone function min frequency: 31 Hz. Max frequency 65535 Hz
Syntax BUT:
tone(pin, frequency) primitive buzzer cannot play such
tone(pin, frequency, duration) a high frequencies.
Parameters
pin: the pin on which to generate the tone
frequency: the frequency of the tone in Hertz - unsigned int
optional parameter: duration: the duration of the tone in milliseconds - unsigned long
Returns
nothing

The alternative tone function can be

implemented by direct manipulations with
relative pin
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 KY-006 Passive Buzzer play melody
https://www.arduino.cc/en/Tutorial/ToneMelody?from=Tutorial.Tone

Go to above page to see the code. BUT: Use buzzer, not 8 Om speaker !!!!!!

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 Speaker instead of Passive Buzzer
If you connected the speaker directly to the Arduino digital pin
you have damaged your Arduino pin by pulling too much current from it.

Do not rely on internal protection resistor.

You need at least a 120 ohm resistor in line with the speaker for direct connection.
Of course it will not be as loud but then you are not burning your output pin.

For best results you need to use a transistor and capacitor to connect your speaker. Google for
lots of schematics.

Translation: Use Power Amplifier with different Power Supply.

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 KY-019 5V Relay Module
http://tinkbox.ph/sites/tinkbox.ph/files/downloads/KEYES%205V%20Relay%20Module%20KY-019.pdf

Relay module with one normally open and one normally closed contacts.
It can be used to control home appliances up to 220V AC 10A or 30 V DC 10A.

Do not Connect serious staff here

REMEMBER: It case of 220 V
EE must think what and how can - : GND
be connected Middle Pin : +5V
S : Digital Signal

NC : Normally closed
NO : normally open
Common : common

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 KY-019 5V Relay Module
http://tinkbox.ph/sites/tinkbox.ph/files/downloads/KEYES%205V%20Relay%20Module%20KY-019.pdf

A lot of good questions can be asked during exam

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KY-019 5V Relay Module. Low Voltage connection

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KY-019 5V Relay Module. Low Voltage connection

The buzzer will turn on

every two seconds.
You can also hear
the tick of relay
every two seconds

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 Other Modules

Design and usage of other modules will be explained later.

Please do not use them before explanations

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