This section defines the network credentials and server details required for sending the email. The ESP32-CAM connects to WiFi using the SSID and password. The host address, HTTPS port (443), and API ...

In this video I'm building an Arduino Heart Rate Monitor that is housed in a toy handle in the style of the Star Trek Tricoder. The device uses the PulseSensor with an Arduino Pro Mini and an OLED ...

A new nanostructure gas sensor uses safe blue LED light to distinguish hydrogen, ammonia, and ethanol with 56x better ...

At first glance, it may look like [Rybitski]’s 7-segment RGB LED clock is something that’s been done before, but look past the beautiful mounting. It’s not just stylishly framed; ...

Light aircraft often use a heading indicator as a way to know where they’re going. Retired instrumentation engineer [Don Welch] recreated a heading indicator of his own, using cheap ...

Crystal jellyfish have an eerie beauty: thanks to a natural protein, they emit a faint green glow. For decades, researchers ...

The library gives control over up to 16 parallel working PIR devices over I2C. The idea for this library came up in a discussion about how to fully cover an area with PIR sensors without blind spots ...

Abstract: This paper presents a wireless communication system utilizing a 433MHz RF module alongside human presence detection using a Passive Infrared (PIR) sensor. The system is designed to enable ...

The PixArt PAJ7025R2 is an infrared camera with integrated DSP capable of tracking multiple IR light sources at high frame rates. Its predecessor was used in Nintendo's Wii Remote controller. Johnny ...

Abstract: The increasing global concern regarding humane pest control methods and the need for effective small mammal management in various environments have prompted the development of innovative ...

A consumer scans an Alipay QR code to pay for the order at a self-service restaurant in Hangzhou, Zhejiang province. [Photo/Xinhua] The first China-led international standard for QR codes was ...