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LCD on a Pi

This is a simple way to use an i2c display on a Pi. the test script prints both “hello world” and the Ip address of the Pi. Save the DRIVER python script in the same […]

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Silicon Derby Base Vehicle

This is the basic code for version 1 of dojo derby vehicle. Version 2 will change the fee tech module with an h bridge, and the code will be modified. Also speed controls need to […]

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Small H Bridge on a Pi

This is the code I tested with for the H Bridge on the Pi. You can either turn on GPIO pins for full speed, or you can use PWM. Pi support software PWM, and this […]

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Arduino – Send Commands with Serial Communication

With the Arduino IDE Serial Monitor you can send commands to your Arduino. Functional Parts in the Project: Arduino Uno – https://store.arduino.cc/usa/arduino-uno-rev3 560 Piece Jumper Wire Kit – https://amzn.to/2MsCLjL 220 Ohm Resistors – https://amzn.to/2RiiMD9 Breadboard Kit – https://amzn.to/2Xih5ei LED […]

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Arduino Displays – Multicolor LED (RGB LED)

3 Color RGB LED’s allow you to use a single LED to show multiple colors. Functional Parts in the Project: Arduino Uno – https://store.arduino.cc/usa/arduino-uno-rev3 560 Piece Jumper Wire Kit – https://amzn.to/2MsCLjL 220 Ohm Resistors – https://amzn.to/2RiiMD9 Breadboard Kit […]

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MySQL – Find Minimum and Maximum Values in Column

You can find the Minimum and Maximum values in a column using SQL. min() https://dev.mysql.com/doc/refman/8.0/en/group-by-functions.html https://www.w3schools.com/sql/func_mysql_min.asp max() https://www.w3schools.com/sql/func_mysql_max.asp https://dev.mysql.com/doc/refman/8.0/en/group-by-functions.html

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PHP – Test Transformation (strtolower, strtoupper, ucfirst, ucwords

Text transformation in PHP is useful not just for esthetics, but to also make sure that data is uniform when dealing with databases and such. strtolower() https://www.php.net/manual/en/function.strtolower.php https://www.w3schools.com/php/func_string_strtolower.asp strtoupper() https://www.php.net/manual/en/function.strtoupper.php https://www.w3schools.com/php/func_string_strtoupper.asp ucfirst() https://www.php.net/manual/en/function.ucfirst.php https://www.w3schools.com/php/func_string_ucfirst.asp ucwords() […]

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HTML Intro- Auto Refresh Webpages

You can have your HTML document auto refresh itself so that d=ynamic information is continuously updated. <meta http-equiv=”refresh” content=”5″> https://www.w3schools.com/tags/att_meta_http_equiv.asp autoUpdate.php

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PHP – Parse Filenames and Paths with pathinfo()

The pathinfo() function allows you to turn a filepath into an Array and then interact with the keys of the Array. You can grab the Filename, Extension, Folder Name and Basename. pathinfo() https://www.php.net/manual/en/function.pathinfo.php https://www.w3schools.com/php/func_filesystem_pathinfo.asp pathinfo.php

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CSS and HTML 5 – Colors

You can do some interesting things with color on your HTML pages with color options with CSS. Color Picker: https://www.w3schools.com/colors/colors_picker.asp Color Names: https://www.w3schools.com/colors/colors_names.asp color.html colorStyle.css