Small Sound Sensor Brick

Pictured with the KY-038 kit module plugged in.

Kit Bricks · SKU TP-K37

Small electret microphone with comparator.

₹299

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Works with TinkerPie V1 · Arduino C++ with the TinkerPieBricks library · Delivery across India: ₹100, 3–7 days · 7-day replacement for damaged or defective kits

About this kit

Small electret microphone with comparator. The Small Sound Sensor Brick is a carrier for the KY-038 module from common 37-in-1 sensor kits: plug the module into the socket and connect one cable to a TinkerPie SENSOR port. A small CH32V003 processor on the brick does the timing work, so your program simply reads the result over I2C.

Features

• Sound detect output (pot)
• Sound peak level every 50 ms
• Noise meter projects
• Plug the kit module straight into the socket – no jumper wires
• One cable to any TinkerPie SENSOR port (I2C), BUS IN + BUS OUT to chain more bricks
• On-board CH32V003 does the timing – your code just reads the result

Specifications

How to use it with TinkerPie

1. Plug the KY-038 module into the 2.54 mm socket on the top edge. Match the pin names: the brick says AO G + DO, the module has the same letters.
2. Connect BUS IN to any TinkerPie SENSOR 1-4 port with a 4-pin JST-PH cable (the same cable as the other sensors).
3. More bricks? Plug the next one into BUS OUT. Two bricks of the same type need different addresses: bridge ADDR +1, +2 or +4 on the back (0x14-0x17; the first is 0x14).
4. Install the TinkerPie and TinkerPieBricks Arduino libraries, open the quick-start sketch below, choose the board ESP32S3 Dev Module and upload.

Libraries: TinkerPie and TinkerPieBricks (Arduino IDE: Sketch → Include Library → Add .ZIP Library). Full guide: getting started with TinkerPie Bricks.

Quick start

Upload this, open the Serial Monitor at 115200 baud and watch the TinkerPie matrix.

// Small Sound Sensor Brick (TP-K37): quick start
// Reads the brick and shows the value on the TinkerPie matrix and in the Serial Monitor (115200 baud).
#include <TinkerPie.h>
#include <TinkerPieBricks.h>
using namespace tinkerpie;

tpb::KitAnalog mic;

void setup() {
  Serial.begin(115200);
  tinkerpie::begin();            // also starts the SENSOR ports (I2C bus Wire1)
  if (!mic.begin(tpb::KitAnalog::SOUND)) Serial.println("Small Sound Sensor Brick not found at 0x14: check the cable to SENSOR 1-4");
}

void loop() {
  uint16_t loud = mic.level();       // loudness (peak to peak over 50 ms)
  Serial.printf("loudness %u   claps %u\n", loud, mic.events());
  led::plotBarGraph(loud, 400, Colors::Cyan);
  basic::pause(50);
}

Project: Classroom noise meter

A bar shows how loud the room is. When it stays too loud, TinkerPie shows a sad face to ask for quiet.

// Classroom noise meter: Small Sound Sensor Brick (TP-K37)
// A bar shows how loud the room is. When it stays too loud, TinkerPie shows a sad face to ask for quiet.
#include <TinkerPie.h>
#include <TinkerPieBricks.h>
using namespace tinkerpie;

tpb::KitAnalog mic;
int loudFor = 0;

void setup() {
  Serial.begin(115200);
  tinkerpie::begin();            // also starts the SENSOR ports (I2C bus Wire1)
  if (!mic.begin(tpb::KitAnalog::SOUND)) Serial.println("Small Sound Sensor Brick not found at 0x14: check the cable to SENSOR 1-4");
}

void loop() {
  uint16_t loud = mic.level();
  loudFor = loud > 200 ? loudFor + 1 : 0;
  if (loudFor > 40) basic::showIcon(IconNames::Sad, Colors::Red);
  else led::plotBarGraph(loud, 300, loud > 200 ? Colors::Orange : Colors::Green);
  basic::pause(50);
}

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