Piezo elements have the useful ... But the whole circuit provides an input button, haptic feedback, and the option of using the buzzer as a buzzer, so at least it is relatively economical if ...
It runs on mains power and uses a 100dB piezo buzzer for ear-splitting effectiveness to alert [Adam] whenever the freezer is at 32°F/0°C or above. If the Arduino loses sight of the DHT22 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback