Component Breakdown
Emergency Call Button
Vision
Arduino paired with a 443MHz receiver, when button is pressed the force from your hand generates a DC supply to power a 443MHz transmitter, this sends a signal to the Arduino which then decodes and processes the signal to send an alert over WiFi. This system does not need ANY internal or external power sources, the user powers it with their hand, impressive right? :)
Schematics
This PCB schematic integrates a USB-powered ESP32-C3 microcontroller with a CM2217LB RF front-end for wireless communication. It features USB-C and USB-A inputs, ESD and fuse protection, 3.3 V regulation, a 27 MHz crystal, and an impedance-matched antenna network. Decoupling capacitors and filtering ensure stable operation, while accessible I/O lines support programming, debugging, and external peripherals.
