Thus, they entered a heart rate sensor to our 2025 One Hertz Challenge! The build is based around a Wemos D1 mini, a ESP8266 development board.

A novel oil sensor designed to address the issue of oil monitoring accuracy influenced by the oil medium and temperature utilizes electrostatic induction coupled with a fringing electric field effect.

We show experimentally how local overheating, associated with sub-optimally designed analog clock sources, can compromise the HF performance of a balanced comparator as well as an RFSQ/ERSFQ circuit ...

Learn how to interface ESP32 thermal printer with complete tutorial. Includes PNP-500 wiring, Arduino code, circuit diagrams, and projects for receipt printing, barcodes, and QR codes. Perfect for ...