Gravity Analog Microphone Sound Sensor

The analogue sound sensor from DFRobot picks up the ambient loudness with a microphone. An LM358 amplifier boosts the signal, a microcontroller reads it at an analogue input. This allows sounds such as clapping to be detected. DFRobot does not specify a sound level in dB, the value is relative. The module works at 3.3 V and 5 V.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces
• Gravity IO Expansion Shield for Arduino V7.1
• Gravity 16Bit 4-Channel ADC Analog Digital Converter I2C ADS1115
• DFRobot Audio Analyzer Module

Features:

• Microphone with LM358 amplifier (DFRobot schematic V2.2)
• Analogue output, relative loudness
• According to DFRobot well suited together with the Audio Analyzer module
• Operation at 3.3 V and 5 V, for example with Arduino, ESP32 or micro:bit
• On the Raspberry Pi only readable via an ADC such as the ADS1115, as the Raspberry Pi has no analogue inputs
• Gravity PH2.0 3-pin connector, marked A for analogue
• 2 mounting holes 3 mm

Application Examples:

• Clap switch, for example to find misplaced keys with a buzzer
• Loudness display with LEDs
• Noise detector in Arduino projects

Documentation:

• Wiki DFRobot DFR0034
• Example code for Arduino (DFRobot wiki)
• Schematic (PDF)
• Datasheet (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: DFR0034
• Amplifier: LM358
• Supply voltage: 3.3 V to 5 V
• Interface: analogue
• Connector: Gravity PH2.0 3-pin, cable blue signal, red VCC, black GND
• Dimensions: 22 × 32 × 10 mm
• Weight: 12 g

Scope of Delivery:

• 1× Gravity Analog Microphone Sound Sensor
• 1× Gravity analogue sensor cable 3-pin, PH2.0 to Dupont socket, 30 cm