DC 5V Passive Electronic Buzzer 85dB PCB Mount Alarm Beeper for Microcontroller Projects

Pack of 2 passive electronic buzzers for 5V systems. These patch type beepers deliver intermittent sound output at 85 dB for clear audible alerts. Designed for PCB mounting, they are compact and easy to integrate into control panels, alarms, and DIY electronics. Key benefits Clear audible alerts: 85 dB output provides a noticeable tone for alarms and notifications. Flexible tone control: passive design accepts external drive signals, allowing custom tones and intermittent patterns when driven by pulse or PWM. Easy integration: patch type package and standard terminals simplify mounting onto printed circuit boards and small enclosures. Compact and reliable: small footprint fits tight spaces and supports lowpower 5V circuits. Two units included: dual pack makes it convenient for multiple installations or spares. What it does Function: passive electronic buzzer that produces an intermittent sound when driven with an appropriate pulsed signal. Requires an external oscillating drive source to produce tones. Operating voltage: DC 5V. Sound level: rated at 85 dB under operating conditions. Package type: patch type for PCB mounting. Compatibility and use Designed for 5V DC control circuits and compatible with common 5V microcontroller systems and control boards. Can be driven directly by a controller output when configured for pulse output, or via a driver transistor or driver circuit if additional current is required. Practical applications Home and small business alarm systems: add an audible alert to door sensors, motion detectors, or alarm control panels. DIY electronics and hobby projects: integrate with timers, counters, and microcontroller projects to signal events and status changes. Equipment and control panels: provide clear intermittent warnings or status tones in appliances, machinery, or monitoring devices. Installation tips Use a pulsed or PWM signal to generate intermittent tones and patterns. If controller output current is limited, drive the buzzer through a transistor or driver to protect the controller. Observe correct polarity and secure PCB soldering for reliable performance. Package contents 2 passive electronic buzzers, DC 5V, patch type, intermittent sound, 85 dB. This product provides a compact, flexible audible signaling solution for 5V electronic systems where a reliable intermittent alarm tone is required.