KY-038 Datasheet PDF – Microphone Sound Sensor Module

Part Number: KY-038, KY038

Function: Microphone Sound Sensor

Package: Module type

Manufacturer: Joy-IT, ETC

Images:KY-038 pdf sensor


KY-038 is Microphone Sound Sensor Module. This sensor module is an electronic component or sensor module designed to detect sound and convert it into an electrical signal that can be processed or analyzed by a microcontroller, microprocessor, or other digital electronics. These modules are commonly used in various applications, including sound-activated systems, voice recognition, noise monitoring, and audio-related projects.


Technical data / Short description :

1. Digital Out : You can use a potentiometer to configure an extreme value for the sonic. IF the value exceeds the extreme value it will send a signal via digital out.

2. Analog Out : Direct microphone signal as voltage value

Functionality of the sensor

The sensor has 3 main components on its circuit board. First, the sensor unit at the front of the module which measures the area physically and sends an analog signal to the second unit, the amplifier. The amplifier amplifies the signal, according to the resistant value of the potentiometer, and sends the signal to the analog output of the module.

The third component is a comparator which switches the digital out and the LED if the signal falls under a specific value. You can control the sensitivity by adjusting the potentiometer.

KY-038 pinout datasheet


1. Sound-activated lighting systems.

2. Voice-controlled devices and voice recognition.

3. Audio recording and monitoring systems.

4. Noise-level monitoring and control.

5. Intrusion detection and security systems.

6. Acoustic analysis and measurement equipment.

KY-038 PDF Datasheet

ASM121 PDF Datasheet – Temperatue Sensor, Thermistor

Part Number: ASM121

Function: Temperatue Sensor, Thermistor

Package: 1.2mm x 1.5mm QFN

Manufacturer: Andigilog


1 page
ASM121 pdf pinout


The ASM121 is a high-precision, 3-lead CMOS silicon thermistor in an ultra-small leadless package that provides a cost-effective solution for applications requiring high-accuracy low-power temperature monitoring. The aSM121 functions in a way that is similar to a PTC thermistor.

However, it is linear-calibrated, enabling application developers to directly interpret output voltage as
temperature without complex compensation for nonlinearity.


1. Precision Calibrated to ±1°C at 25°C

2. Temperature Range : -30°C to 125°C

3. Extremely Linear Output Ramp : 10mV/°C

4. 0°C Output : 0.50V

5. Output Ramp is Calibrated to Degrees Celsius

6. Low Operating Current : 14μA

7. Operating Voltage Range : +2.7 V to +3.6V


3 page
ASM121 datasheet


1. Mobile Phones

2. Mobile Communications Terminals

3. Computers

4. Battery Management

5. FAX Machines/Printers/Copiers

6. Portable Medical Instruments

7. HVAC, Power Supply Modules


ASM121 PDF Datasheet