Overview
Description
This is a reference design that could be applied to windows, door entrances, and other points of entry. When a vibration caused by an outside force is detected, an alarm will sound to scare off intruders. This Window Alarm with Buzzer solution features the RL78/G10 general-purpose MCU's functions such as external interrupt, timer module, buzzer output controller, and watchdog timer.
In a normal situation when there is no vibration to a window, the device will enter STOP mode. When vibration is detected, it will release from STOP mode and sound an alarm. With the RL78/G10 STOP mode function, power consumption is suppressed, allowing battery life to last longer. The Window Alarm with Buzzer can play a defensive and alarm role for ordinary house doors and windows, as well as large glass windows, glass cabinets and booths.
Features
- Demo board includes the RL78/G10 MCU
- After vibration is detected, the system will activate an audible and visual alarm. The sound of the alarm is around 80dB and lasts 20s
- After the ON/OFF switch is activated, the system is powered on and starts initialization; the vibration detection sensor starts to operate 10s later
- Reset standby function: LED blinks with a 50ms cycle and lasts 10s
- The LED blinks about every 3.28s to indicate the MCU is operating normally
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Videos & Training
Renesas demonstrates the Window Alarm with Buzzer quick solution featuring the RL78/G10 microcontroller. This solution is designed as a security device to deter break-ins by detecting vibrations on a window and sounding an alarm.