Passive Buzzer Shield V1.0 for WEMOS D1 Mini — Alarm & Tone Module, 3.3V / 5V

Passive Buzzer Shield V1.0 for WEMOS D1 Mini — Alarm & Tone Module

This passive buzzer shield plugs directly onto a WEMOS D1 Mini (ESP8266) and provides a passive piezoelectric buzzer for generating tones, alarms, and audio notifications in IoT and Arduino projects. Unlike active buzzers, the passive buzzer requires a PWM signal to produce sound, allowing you to play different frequencies and melodies using the tone() function or custom PWM code.

Key Specifications

Parameter	Value
Compatible Board	WEMOS D1 Mini (ESP8266)
Buzzer Type	Passive piezoelectric
Supply Voltage	3.3V / 5V (via D1 Mini)
Control	PWM signal (D5 pin, configurable)
Form Factor	D1 Mini shield (stacking compatible)

Active vs Passive Buzzer

Feature	Passive Buzzer (This Shield)	Active Buzzer
Sound Control	PWM frequency (any tone)	Fixed frequency (one tone)
Melody Support	✅ Yes	❌ No
Code Required	PWM / tone() function	Simple HIGH/LOW

Why Choose This Buzzer Shield?

• ✅ Direct D1 Mini plug-in — no wiring needed, stacks directly on WEMOS D1 Mini
• ✅ Passive buzzer — play any frequency, melodies, and custom tones
• ✅ 3.3V / 5V compatible — powered by D1 Mini's onboard supply
• ✅ Stacking compatible — add more D1 Mini shields on top

Typical Applications

• IoT device alarm and notification sound
• ESP8266 doorbell and alert system
• Arduino melody and music player
• Smart home sensor alert buzzer
• Clap switch and sound trigger feedback

Package Contents

• 1 × Passive Buzzer Shield V1.0 for WEMOS D1 Mini

WEMOS D1 Mini board not included.

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

Not satisfied? Return any item within 90 days of purchase for a full refund or exchange. Items must be in original condition.

We are committed to quality, reliability, and customer satisfaction. Every product is carefully selected and tested to meet the highest standards.