This project turns an old mobile charger into a theft alarm.
A simple 8x32 LED matrix alarm clock.
NRA allows us, in case of bike accident, to locate the injured person through the Sigfox network. It also improves visibility on the road.
Create a burglar-tripwire with the ultrasonic sensor.
A control panel powered by Raspberry Pi 3 using a touchscreen and Android Things to communicate with Home Assistant over MQTT.
This is a smart wheelchair
Alexa + Raspberry Pi + 7 panel display = Time Machine.
Using an Adafruit compass/accelerometer and an 80-decibel alarm, this project prevents thieves from stealing your backpack.
This project uses an ultrasonic sensor to "sense" if the door opens or closes.
A simple touchscreen interface, powered by a Raspberry Pi Zero, which controls the alarm in Home Assistant over MQTT.
This alarm clock and timer work without the help of a computer. All the settings can be done on the clock itself and stored in the EEPROM.
I created an alarm clock using a motion detection sensor so that you're not able to just hit the snooze button and go back to sleep.
A 3D printed clock in the form of the Star Wars R2D2 droid. Featuring Internet time, Alarm, Time format and Timer with prerecorded sounds
Using the RCWL-0516 radar sensor to detect motion.
This is an analog-style digital clock with multiple display states, a 24-hour alarm, a countdown alarm, multiple alarm display states...
Be alerted to any door or window opening and closing in your house on your smart phone.
This is an alarm for your house that rings when a movement is detected, like when the door is open or when a body walks in front of it.
Ever wake up in the morning found your CPAP mask is off? This device will alarm you if you have unintentionally removed mask during sleep.
Transform your Oplà kit in a night table alarm
It is simple to learn electronics with a RPi and its GPIO Zero Library.
If the flame sensor detects a flame, a buzzer and a LED (connected by a relay) will activate.
A temperature alarm circuit with buzzer is simulated in LTspice in order to develop your intuition and also more simply for fun!
RFID Employee Card Scanner and Improved Systems by using PIR sensor.
In this article we setup a Particle Photon module to monitor temperature throught the SI7020-A20 temperature/humidity mini module sensor.
