Pseudonymous maker “gokux” has turned a Seeed Studio XIAO ESP32C3 microcontroller board right into a self-contained motion-triggered alarm — packing the board, battery, inertial measurement unit (IMU), and a buzzer right into a compact 3D-printed case.
“Through the use of this [device], if a small motion is detected by the IMU, it’s going to set off a sound within the buzzer,” gokux explains of the gadget. “It is going to warn you if an object strikes even whether it is presupposed to be stationary, like a door, dwelling equipment, or drawer. You may connect this machine to any floor with double[-sided] tape. It’s also helpful for monitoring kids and aged folks.”
The Tiny Movement Alarm goals tracks something it is caught to with an inner IMU, warning if one thing strikes when it should not. (📹: gokux)
Contained in the eye-catching 3D-printed case is a Seeed Studio XIAO ESP32C3, a compact growth board constructed across the Espressif ESP32-C3 microcontroller — the wi-fi connectivity of which matches unused on this explicit mission, although it is simple to see it being prolonged to supply network-based alerts in addition to a locally-audible siren. To this, gokux has added a TDK MPU-6050 three-axis inertial measurement unit (IMU) with gyroscope and accelerometer to detect issues shifting once they should not.
“After powering on the alarm is not going to be activated,” gokux says of the machine’s methodology of operation. “To activate this alarm you have to press down the push button, then you’ll hear one beep sound which signifies the activation sequence is profitable. After urgent the button we can have 4 seconds to put this alarm, any motion occurring throughout this 4 seconds might be ignored. After the stand-by sequence, you’ll hear two beep sounds which point out the Detection sequence is began. From right here the alarm is absolutely armed.”
With an ESP32-C3 inside, the Tiny Movement Alarm might be upgraded sooner or later for network-based alerts. (📷: gokux)
As soon as armed, any motion detected by the IMU triggers a ten-second sounding of the alarm — plus a flashing LED, for good measure. “I used a XIAO ESP32C3 for [a] future-proof design,” gokux says, “as a result of with none {hardware} change we are able to convert it to a variety of units like notifying alarm triggers with cellphone notifications or performing different duties like if you happen to open the door it’s going to change on the room lights and so forth.”
The complete mission is documented on Instructables, together with wiring diagram, supply code, and the 3D print recordsdata for the case.