I thought that it could be useful to compile a list of the little Keyes boards and to link them to blogs on this site, wherever possible.
KY-001. Temperature Sensor DS18B20. Find sketch here.
KY-002. Vibration Sensor, outputs a LOW when vibrated. Find sketch here.
KY-003. Hall Effect Sensor. Find sketch here.
KY-004. Push button, outputs a HIGH when pressed
KY-005. InfraRed Emitter
KY-006. Passive Buzzer, needs a signal to operate, like a speaker.
AD-007. HC-SR05 PIR, motion detector. This module is included in the Sunkey Sensors kit.
KY-008. Laser 5 volts 650nm. Find sketch here.
KY-009. Three colour, SMD, LED. Find sketch here.
KY-010. Opto Light Switch, output HIGH when beam broken. Find sketch here.
KY-011. Two colour LED, Red and Green
KY-012. Active Buzzer. Find sketch here.
KY-013. Temperature Sensor, Analogue. Find sketch here.
AD-014. GY65 Atmospheric pressure sensor, similar to BMP180. This module is part of the Sunkey Sensor kit.
KY-015. Humidity Sensor, DHT 11
KY-016. Three colour LED. Find sketch here.
kY-017. Mercury Tilt Switch
KY-018. LDR, Analogue output. Find sketch here.
KY-019. Single 5 volt relay
KY-020. Tilt Sensor
KY-021. Reed Switch
KY-022. InfraRed Receiver, based on 1838 IR Receiver/Decoder
KY-023. X/Y Joystick, two potentiometers and a button
KY-024. Hall Effect Sensor, digital output only
KY-025. Reed Relay, digital output only
KY-026. Flame Sensor, digital output only
KY-027. Magic Light Cup Module, LED Blinks as Mercury switch Tilts
KY-028. Temperature Sensor, Analog sensor with HIGH when temp reached.
KY-029. Two colour LED module. Red and Green.
KY-030. MQ02 Gas Sensor.
KY-031. Hit Sensor, similar to a vibration sensor find sketch here.
KY-032. Obstacle Avoidance Detector, IR Tx/Rx pair
KY-033. Line Follower
KY-034. Automatic flashing LED Module, seven colours
KY-035. Hall Effect Sensor, Digital Switch Output only
KY-036. Metal Touch Sensor, Digital output. Sketch can be found here.
KY-037. Microphone Sound Sensor, Digital Output only
KY-038. Microphone Sound Sensor, digital and Analogue output
KY-039. Pulse Rate Detector, high sensitivity so shield from mains lighting
KY-040. Rotary Encoder
Rydepier Blog Spot 
The missing numbers exist in other similar kits, such as the one from Sunkee. They are as follows:
007 – HC-SR05 PIR Module (precise ultrasonic range sensor – the ones you usually see as a “buy together with” option for those standard 37 part kits).
014 – GY-65 Module (atmospheric pressure sensor).
030 – MQ-2 Module (gas / smoke sensor).
Thanks for a great overview page, sure wish my kit came with that instead of 22MB worth of PDF files in Chinese ..
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Many thanks for the information, I have updated the list to include those you described.
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Most welcome! You can have a look at http://www.amazon.com/Sunkee-Modules-Arduino-Mega2560-Mega328/dp/B00F916SS8 to see what the 007 and 014 clones look like.
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