Kit companion

Keyestudio 37 in 1 Sensor Kit: every lesson, simulated

All 37 module projects, in order, each a circuit that runs in your browser on the pins the project uses. Try every sensor in the box, from a light and a microphone to a flame, a magnet and a motion detector, before you wire one.

Open the first lesson Find your lesson What else it can build

Not affiliated with Keyestudio. Lesson titles are referenced so you can follow along.

Lesson by lesson

Every lesson in the kit’s order

Lesson numbers and titles follow the Arduino tutorial for KS0068 in Keyestudio’s online wiki. Each circuit uses the kit’s parts on the pins the lesson uses.

37 of the 37 lessons with a circuit run here, 8 of them with a change we name.

Project 1
White LED Light
Runs, with a change
An LED module on pin 7, on for a second and off for a second.
The module is a part and its resistor on a little board; here the same parts sit on a breadboard.
Open in the editor LED module on pin 7, blinking
Project 2
Red LED Light
Runs, with a change
The same blink on pin 7 with the red LED module.
The module is a part and its resistor on a little board; here the same parts sit on a breadboard. Click the LED and make it red.
Open in the editor LED module on pin 7, blinking
Project 3
3W LED Module
Runs, with a change
A 3 W LED on pin 13, blinking once a second.
The module’s LED and its driver are wired as parts here: a 3 W power LED, a MOSFET module on pin 13 and a 4.7 ohm resistor from 5 V.
Open in the editor 3 W power LED on pin 13
Project 4
RGB LED
Runs, with a change
Red on pin 11, blue on 10 and green on 9, each color fading up and down in turn.
The module carries the three resistors on its board; here they sit on a breadboard with the LED.
Open in the editor RGB LED module: red 11, blue 10, green 9
Project 5
Analog Temperature
Runs here
A thermistor module on A0, turned into degrees with the beta equation.
Open in the editor Analog temperature module on A0
Project 6
Photocell Sensor
Runs here
A photoresistor module on A0: the reading follows the light.
Open in the editor Photocell module on A0
Project 7
Analog Sound
Runs here
A microphone module on A0: clap and the reading jumps.
Open in the editor Analog sound module on A0
Project 8
Analog Rotation Sensor
Runs here
A rotation sensor on A0, its reading printed as you turn it.
Open in the editor Analog rotation sensor on A0
Project 9
Passive Buzzer
Runs here
A passive buzzer on pin 3 plays two tones made by switching the pin by hand.
Open in the editor Passive buzzer module on pin 3
Project 10
Digital Buzzer
Runs here
An active buzzer on pin 3, on for a second and off for a second.
Open in the editor Active buzzer module on pin 3
Project 11
Digital Push Button
Runs here
A push button module on pin 3 lights the LED on pin 13 while it is held.
Its 10k is set as a pull-down, as on the kit’s board: pressed reads HIGH.
Open in the editor Button module on pin 3 lights the LED on 13
Project 12
Digital Tilt Sensor
Runs, with a change
A tilt switch on pin 3; the LED on pin 13 follows it.
The module is a part and its resistor on a little board; here the same parts sit on a breadboard.
Open in the editor Tilt switch on pin 3 lights the LED on 13
Project 13
Photo Interrupter
Runs here
Block the slot of the photo interrupter on pin 3 and the LED on pin 13 follows.
Open in the editor Photo interrupter on pin 3 lights the LED on 13
Project 14
Capacitive Touch
Runs here
A touch pad on pin 2 lights the LED on pin 13.
Open in the editor Touch sensor on pin 2 lights the LED on 13
Project 15
Knock Module
Runs here
Knock the sensor on pin 3 and the LED on pin 13 flashes.
Its 10k is set as a pull-down, as the kit’s sketch reads it: a knock is HIGH pulses.
Open in the editor Knock sensor on pin 3 lights the LED on 13
Project 16
Hall Magnetic Sensor
Runs here
Bring a magnet to the Hall sensor on pin 3 and the LED on pin 13 lights.
The sketch turns on pin 3’s own pull-up, which the module carries on its board.
Open in the editor Hall sensor on pin 3 lights the LED on 13
Project 17
Line Tracking Sensor
Runs here
A line sensor on pin 3 tells a black line from a white floor.
Open in the editor Line tracking sensor on pin 3
Project 18
Infrared Obstacle Avoidance
Runs here
Something in front of the obstacle sensor on pin 3 lights the LED on pin 13.
Open in the editor Obstacle sensor on pin 3 lights the LED on 13
Project 19
PIR Motion Sensor
Runs here
Movement in front of the PIR sensor on pin 3 lights the LED on pin 13.
Open in the editor Motion sensor on pin 3 lights the LED on 13
Project 20
Flame Sensor
Runs here
A flame near the sensor on pin 2 lights the LED on pin 13.
Open in the editor Flame sensor on pin 2 lights the LED on 13
Project 21
Vibration Sensor
Runs here
A shake on pin 3 fires an interrupt and lights the LED on pin 13 for half a second.
Open in the editor Vibration sensor on pin 3, read by an interrupt
Project 22
Analog Gas Sensor
Runs here
An MQ-2 gas sensor on A0: more gas, a higher reading.
Open in the editor Gas sensor module on A0
Project 23
Analog Alcohol Sensor
Runs here
An MQ-3 alcohol sensor on A0: the reading climbs with the vapor.
Open in the editor Alcohol sensor on A0
Project 24
Digital IR Transmitter
Runs, with a change
An infrared LED module sends codes for another board’s receiver to read.
Here two Nanos send to each other, each with an IR LED and a receiver: press a button and the other board reads the code. A KY-005 is the same LED on a board; find it in the parts panel. The receiving side alone is project 25.
Open in the editor Laser tag: two Nanos
Project 25
Digital IR Receiver
Runs here
An IR receiver on pin 11 decodes the remote’s buttons.
Open in the editor IR receiver module on pin 11
Project 26
Rotary Encoder
Runs here
An encoder on pins 2, 3 and 4 counts clicks each way, with an LED for each direction on 5 and 6.
Open in the editor Rotary encoder on pins 2, 3 and 4, LEDs on 5 and 6
Project 27
LM35 Linear Temperature
Runs here
An LM35 on A0: 10 millivolts a degree, printed in Celsius.
Open in the editor LM35 temperature sensor on A0
Project 28
18B20 Temperature Sensor
Runs here
A DS18B20 on pin 2 reads the temperature over one wire.
Open in the editor DS18B20 temperature sensor on pin 2
Project 29
ADXL345 Three Axis Acceleration
Runs here
An ADXL345 on the I2C pins reports X, Y and Z as you tip it.
Open in the editor ADXL345 accelerometer on I2C
Project 30
DHT11 Temperature and Humidity Sensor
Runs here
A DHT11 on pin 4 reports the humidity and the temperature.
Open in the editor DHT11 module on pin 4
Project 31
Bluetooth Module
Runs, with a change
An HC-05 brings messages from a phone to the board, and the board answers with a lamp.
Here the module talks on pins 2 and 3, so the serial monitor stays free, and a word turns a lamp on pin 9 on or off. The lesson wires it to pins 0 and 1 and blinks pin 13 for the letter a.
Open in the editor Bluetooth lamp
Project 32
TEMT6000 Ambient Light
Runs here
A TEMT6000 ambient light sensor on A0: brighter light, a higher reading.
Open in the editor Ambient light sensor on A0
Project 33
SR01 Ultrasonic Sensor
Runs, with a change
An ultrasonic sensor with TRIG on 8 and ECHO on 7 prints the distance, and pin 13 lights when nothing is in range.
An HC-SR04 stands in for the SR01; the two are driven the same way.
Open in the editor Ultrasonic sensor on 8 and 7, the LED on 13 when out of range
Project 34
Joystick Module
Runs here
X on A0, Y on A1 and the push switch on pin 3, printed together.
Open in the editor Joystick module: A0, A1 and pin 3
Project 35
DS3231 Clock Module
Runs here
A DS3231 on the I2C pins keeps the date and time; the board prints them once a second.
The sketch reads the clock with RTClib rather than the lesson’s DS3231 library.
Open in the editor DS3231 real-time clock on I2C
Project 36
5V Relay Module
Runs here
A relay on pin 8 clicks on and off every two seconds, switching an LED.
Open in the editor Relay module on pin 8
Project 37
Vapor Sensor
Runs here
A steam sensor on A0: the reading rises as moisture bridges its traces.
Keyestudio publishes no figures for this board, so its curve is the water level sensor’s.
Open in the editor Steam sensor on A0

Lesson list and pins read from Keyestudio’s online tutorial. The explanations on this page are our own.

Learning path

Everything the Keyestudio 37 in 1 Sensor Kit can build

No built-in project uses only the parts in this box yet. The next section shows what to add.

Level up

Add a few parts, unlock more projects

The smallest shopping lists that open the most new projects for the Keyestudio 37 in 1 Sensor Kit.

Add Arduino Uno R3

Unlocks 51 more projects:

Add Resistor and Arduino Uno R3

Unlocks 91 more projects:

Add Pushbutton, Resistor and Arduino Uno R3

Unlocks 113 more projects:

Two kits

Projects that combine two kits

Own another kit as well? These need parts from both boxes, and neither can build them alone.

In the box

The kit’s parts, and what plays them here

The parts in the Keyestudio 37 in 1 Sensor Kit, by the names its maker gives them. Each one is in the editor’s parts panel.

White and red LED modules LED With a resistor on a breadboard.
3W LED module Power LED, 1 W or 3 W star Switched by a MOSFET module, with a resistor to set its current.
RGB LED module RGB LED
Analog temperature module NTC temperature sensor module
Photocell sensor Photoresistor sensor module
Analog sound sensor Sound sensor, KY-038
Analog rotation sensor Analog rotation sensor
Passive buzzer Piezo speaker
Digital buzzer Buzzer
Digital push button Button module, KY-004
Digital tilt sensor Tilt switch
Photo interrupter Photo interrupter, slot
Capacitive touch sensor Touch sensor, TTP223
Knock sensor Knock sensor, KY-031
Vibration sensor Vibration sensor, SW-420
Hall magnetic sensor Hall sensor, A3144
Line tracking sensor Line sensor, TCRT5000
Infrared obstacle avoidance sensor Obstacle sensor, FC-51
PIR motion sensor Motion sensor
Flame sensor Flame sensor
Analog gas sensor Gas sensor, MQ-2
Analog alcohol sensor Alcohol sensor, MQ-3
Digital IR transmitter KY-005 infrared LED module
Digital IR receiver Infrared receiver, VS1838B
Rotary encoder Rotary encoder, KY-040
LM35 temperature sensor Temperature sensor, LM35
18B20 temperature sensor Temperature sensor, DS18B20
ADXL345 accelerometer Accelerometer, ADXL345
DHT11 temperature and humidity sensor Temperature and humidity, DHT22 Set to DHT11 in these circuits.
Bluetooth module Bluetooth serial module, HC-05
TEMT6000 ambient light sensor Ambient light sensor, TEMT6000
SR01 ultrasonic sensor Ultrasonic ranger
Joystick module Thumb stick
DS3231 clock module Real-time clock, DS3231
5V relay module Relay module
Vapor sensor Steam sensor

For the manual

A link and a QR code for this page

Print either one beside a lesson, or tape it inside the box lid. Both open this page.

mokxi.com/k/keyestudio-37

The code is black on white with a quiet border, so it prints and scans at any size from 2 cm up.

Download the QR code (SVG)

Make kits? See what we offer kit makers.

FAQ

Questions about this page

Is this made by Keyestudio?

No. Mokxi is independent and is not affiliated with Keyestudio. The page follows the kit’s lessons so you can use the two side by side; the circuits, sketches and explanations are Mokxi’s own.

Do I need the kit?

No. Every lesson that runs here runs in the browser, so you can try them before you buy a kit, or keep going while a part is missing or broken.

Is the code the same as in my manual?

The pins and the parts are the same, and the sketches use the same libraries where the kit does. The code itself is written for this page, with comments that explain each step, so it will not match the manual line for line.

What do "with a change" and "coming soon" mean?

A lesson marked "with a change" runs, but something differs from the kit, and the note under it says exactly what. "Coming soon" means we cannot simulate that lesson yet, and the note says why. We do not mark a lesson as running unless it does.

Is it free?

Yes. Every lesson on this page opens with no account. A free account saves your own copies of the circuits.