Smoke Alarm Circuit Schematic Smart Smoke Alarm Circuit Update 1 Photo-interrupter module The photo-interrupter is simply an optical coupler with the elements separated with a slot. Anything that ...

It takes a special kind of fool to trust their home and potentially their life to a $5 development board and some Arduino source code they copied and pasted from the Internet.

The hardware is consists of an Arduino microcontroller (here an Arduino Uno R3) and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, gives ...

He suspected EMF interference so as a quick first step he decided to throw together an EMF detector using an Arduino. It uses a bank of LEDs as an indicator bar to reflect the EMF picked up by the ...

The i4 Series is the first low-voltage, system-connected, combination smoke and carbon monoxide detection solution on the market. With the ability to integrate the i4 into conventional security and ...