This article describes a GSM-based emergency call system with an RF receiver that sends calls and SMS to pre-programmed numbers when a small wearable transmitter is activated. It is designed for elderly people and bedridden patients who need to call for help with a single press of a button.
What to do when the chosen microcontroller doesn’t have enough pins? We will find out in this tutorial, where we will learn how to use shift registers to control LEDs and read buttons with just three wires! In six steps, we will use the CD4094 and CD4021 with a PIC microcontroller.
Microchip announced in February two new microcontroller families with “Core Independent Peripherals and Intelligent Analog”: respectively PIC16F18446 family of microcontrollers, and ATmega4809 megaAVR microcontrollers, with the latter to be integrated in the next generation of Arduino boards. “The ATmega4809 has been selected to be the on-board microcontroller of a next-generation Arduino board. The addition of the…
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