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Leonardo Merza

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Development Operations

Run a Cron on the Last Day of the Month

October 25, 2017 - 1 Comment

Run everyday to see if it is the last day of the month. If it is then run cron ‘command’. 00 12 * * * if [`date +%d -d tomorrow` …

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Development Operations

Nginx “Too many open files” Error Solution for Ubuntu

August 15, 2017 - Leave a Comment

If you run an Nginx server, you may come across an issue where you’ve reached the limit of how many files Nginx can have open. System wide resources are controlled …

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Development Operations

Connect to Private Internet Access (PIA) VPN with OpenVPN on Ubuntu

March 21, 2017 - Leave a Comment

This post will go over using OpenVPN in Ubuntu 16.04 to connect to a Private Internet Access (PIA) VPN server. PIA has pre-made configuration files here which we will use …

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Development Operations

Configuring, Installing, and Starting Nginx From Source Code

May 5, 2016 - Leave a Comment

This post will go over the manual installation and configuration of Nginx source code on a Linux based system. Building from source code instead of directly installing from a pre-built …

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Hardware Projects

7×10 LED Matrix Powered by MSGEQ7

June 21, 2013 - Leave a Comment

This project uses the MSGEQ7 in order to power a 7 channel LED equalizer. The goal was to use current components that were already avilable. Using 70 LEDs, a 7×10 …

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Xbox 360 Kinect

Kinect Invisible Drumset

May 25, 2013 - Leave a Comment

This program uses the RGB Camera and Tracking program to display a tracked user in front of a background. A drum set image is then displayed over the user. When …

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Hardware Projects

Lap Timer

May 25, 2013 - Leave a Comment

This project was used to time a vehicle around a track by using a sonar sensor to detect when the vehicle passed by. What made this project challenging is wanting …

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Hardware Projects

LCD Temperature Project

April 11, 2013 - Leave a Comment

The goal of this project was to test out the temperature sensor and LCD screen for a larger long term project. It involves using the DHT22 temperature and humidity sensor …

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Xbox 360 Kinect

Arduino and Kinect Communication

April 10, 2013 - Leave a Comment

Processing can directly talk with a serial port. Two sections of code are shown here. The first will be the code for processing to talk to the Arduino. The second …

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Xbox 360 Kinect

RGB Camera and Tracking

March 15, 2013 - Leave a Comment

This program will track a user and take their outline and paste it onto any background you want.  The setup method includes where you need to add the name of …

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