published: February 1, 2021 — last modified: October 23, 2025
I am currently working on the input panel board for the pet-feeding device. You are invited to review the board and send me your comments or suggestions via this page, Twitter or email.
Table of Contents
The input panel is directly connected to the controller and contains the rotary encoder for the input and four LEDs for various status displays. The input panel also connects to the LCD display via I2C bus and contains the optional level shifter from 3.3V to 5V.
It is mounted with four screws to the front panel, to provide a solid base to the rotary encoder and its knob.
My main idea is to produce a board, someone can use without experience of PCB design software. The design does not have to be universal, but versatile for its intended use.
The schema contains the part numbers where needed. Components, like the LEDs are not labeled, as the user can use any they like.
LR2051-901-Input-Panel-Schema-Rev-B
If you find any problems, like to provide improvements, new ideas or just some feedback, feel free to comment below or contact me on Twitter. 😄
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