HY-SRF05 Datasheet – Ultrasonic Distance Sensor – Arduino

Part Number : HY-SRF05

Function : Ultrasonic Distance Sensor with 2 Channel Logic Level Converter

Package : 4 Pin Module type

Image :
HY-SRF05 image


The logic level converter is a small PCB which safely allows you to interface devices which steps down 5V signals to 3.3V signals and step up 3.3V signals to 5V. The converter has 2,  inputs and outputs and can be used with I2C, SPI, UART, etc. The board needs to be powered via two sources, 5V and 3.3V and your data lines are linked via pins 1 to 2 on each side so aninput on pin 1 will be converted to the lower or higher output on the adjoining pin 1.


HY-SRF05 pinout


1. Working Voltage : 5V(DC)
2. Static current: Less than 2mA.
3. Output signal: Electric frequency signal, high level 5V, low level 0V.
4. Sensor angle: Not more than 15 degrees.
5. Detection distance: 2cm-450cm.
6. High precision: Up to 0.2cm
7. Input trigger signal: 10us TTL impulse
8. Echo signal : output TTL PWL signal
9. Mode of connection:
10. 1.VCC       2.trig(T)      3.echo(R)       4.OUT       5.GND
11. Use method:
12. Supply module with 5V, the output will be 5V while obstacle in range, or 0V if not. The out pin of this module is used as a switching output when anti-theft module, and without the feet when ranging modules.

Reference Link

  1. http://www.robot-electronics.co.uk/htm/srf05tech.htm
  2. http://forum.arduino.cc/index.php?topic=106043.0


HY-SRF05 Datasheet PDF Download

KY-038 PDF Arduino – Microphone Sound Sensor Module

Part Number : KY-038

Function : Microphone sound sensor module

Package : Module Type ( Size : Approx 36 x 16 mm )

Manufactures : KEYES, Arduino


KY-038 image

Description :

0. Adopt LM393 main chip

1. Features high sensitivity, Electret Condenser Microphone ( ECM ) sensor

2. Power supply indicator lamp

3. Comparator output indicator lamp

4. AO, real-time microphone voltage signal output

5. DO, high / low electric level signal output

6. Sensitivity adjusted by potentionmeter

7. Power Supply : 3-5V DC

8. Hole Inner Diameter : Approx. 3mm


Microphone sound detection module

For sound detection Module has two outputs:
1. AO, analog output, real-time output voltage signal of the microphone
2. DO, when the sound intensity reaches a certain threshold, the output high and low signal

The threshold-sensitivity can be adjusted via potentiometer on the sensor

Connecting to the Arduino

Pin + to Arduino 5+
Pin – to Arduino –
Pin A0 to Arduino A0 (for analog program)
Pin D0 to Arduino 13 (for digital program)

Interface definition:

1. AO : analog output sensor
2. GND : ground
3. VCC : Power supply input range: 3V-24V.
4. DO : Digital Output (comparator output)
5. Two red LED indication : POWER and SENSOR. POWER: Power is off. SENSOR: When the microphone senses sound 6. reaches a certain value, this LED light.


External Link

1. http://www.arduinoecia.com.br/
2. http://www.banggood.com/
3. http://linksprite.com/

KY-038 PDF Datasheet