An ultra-low power sensor operates using energy harvesting from various sources for efficient monitoring. The oscillator ...

You have an ESP8266 board like the Wemos D1 ... do pushbutton or sensor-driven wakeup, manage WiFi, and even read the battery voltage – all of these are a single line of code away, and you ...

Originally, this parking/distance sensor used a small TFT to display the distance to an object, but after a few revisions, [Klaus] redesigned the device to speak the current distance, courtesy of ...

So the current flowing through a filament lamp is not directly proportional to the voltage across it. Diodes are electronic components that can be used to regulate the voltage in circuits and to ...