Connecting an HC SR04, LCD display, and relay to Atmega328p

Projects General Guidance
1

Hi, I would like to connect a relay, an HC SR04, and a LCD display to an Atmega328p breakout (I will copy the binary from the Arduino Uno to the Atmega328p).

I am thinking of using a single 5 V source to power the Atmega328p, and drive the application, but worried if there would be a drop due to the number of appliances. Is this feasible. Kindly suggest. I am new to electronics and any suggestions for the above design would be of great help.

Thanks

2

Hi,

A few pieces and example code here:

Ultrasonic
LCD Display
Optically-isolated relay boards
(see "Combining Sketches" )