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Super Simple Automatic Chicken Coop Door

September 21, 2021October 10, 20213 Comments

Pet chickens like to run around and scratch up their yard during the day, but must be safely locked away at night to prevent predators from eating them. Most chicken-keepers accept the twice-daily chore of letting the hens out in the morning, and locking them up at night. This is a project to automate that … Continue reading Super Simple Automatic Chicken Coop Door

Electronic Windvane

January 6, 2021January 5, 20223 Comments

This project documents how to make a windvane to sense the wind direction. It was designed for an autonomous sailboat but could be used in other applications. The structure is mostly 3D printed and uses a gopro mount to attach to the hull. The main sensor is a magnetic encoder that outputs an analog voltage … Continue reading Electronic Windvane

nodemcu pins

ESP8266 NodeMCU (Arduino compiler) Pins. Now with WeMos D1 Mini!

September 21, 2018December 31, 2020Leave a comment

Here are two images I look up often when using ESP8266 boards.  I like the NodeMCU versions, they are cheap and easy to use with USB power or a battery. The pins are not labeled in a friendly way for the arduino compiler, however.  The arduino compiler uses the GPIO numbers on the chip, while … Continue reading ESP8266 NodeMCU (Arduino compiler) Pins. Now with WeMos D1 Mini!

Dumbo the Autonomous Boat

September 11, 2017December 31, 2020Leave a comment

Dumbo is an autonomous research vessel constructed by students at Cal Maritime.  Dumbo carries temperature, salinity, and dissolved oxygen sensors and makes oceanographic observations in the waters off of the Cal Maritime Campus.  This work has been supported by the CSU Council on Ocean Affairs, Science & Technology (COAST). Dumbo is guided by an Ardupilot … Continue reading Dumbo the Autonomous Boat

Hello world!

August 8, 2017August 8, 20171 Comment

If you're looking for my old site, sorry it got hacked and had to be put down. You can email me (mholden at csum dot edu) if you are trying to find something specific.

About This Site

This website is operated by Mike Holden, a professor of Mechanical Engineering at the California State University Maritime Academy.  Generally I post things I make.

Find me on:

  • Github
  • Youtube (personal)
  • Youtube (teaching)
  • Tinkercad
  • n3m0 sends tweets sometimes

Categories

  • Academic and Scholarly (8)
  • Autonomous Vehicles (9)
  • Embedded Computers and Microcontrollers (9)
  • Fun (12)
  • Old and Archived (5)
  • Remote Sensing (7)
  • Sailing (5)
  • Uncategorized (5)

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