Arduino + Pushbutton

October 21, 2016

Description There are a number of digital I/O pins on the board that can be used as a digital input or digital output. If a digital I/O pin is used as an output, you can make a pin HIGH (5V) or LOW (0V) to drive LEDs, servos, LCD displays, etc. If a digital I/O pin […]


Arduino + Servo

October 20, 2016

Description The Arduino servo library allows an Arduino board to control RC (hobby) servo motors. Servos have integrated gears and a shaft that can be precisely controlled. Standard servos allow the shaft to be positioned at various angles, usually between 0 and 180 degrees. Continuous rotation servos allow the rotation of the shaft to be […]


Arduino + LED

October 19, 2016

Description Blink the on-board LED.  Make no mistake – this is an essential skill and a gateway to numerous challenging and creative projects. Hardware Required Arduino Board Circuit Arduino boards have a number of onboard LEDs: ON – Power indicator TX – Transmit (pin 1) – Used for programming and diagnostics (USB serial port communication). […]


Arduino + Microphone

October 19, 2016

Description The microphone module allows you to detect sound. Pinout The module has the following pins: A0, analog output; real-time output voltage signal of the microphone. D0, digital output; when the sound intensity reaches a certain threshold, the digital output goes high. G, ground. +, Vcc (+5Vdc) The threshold-sensitivity can be adjusted via a potentiometer […]


Arduino + LCD(16×2)

October 18, 2016

Description The LiquidCrystal library allows you to control LCD displays that are compatible with the Hitachi HD44780 driver.  There are many of them out there, and you can usually tell them by the 16-pin interface.  This example sketch prints “Hello World!” to the LCD and shows the time in seconds since the Arduino was reset. […]


Tropical garden plants

October 1, 2016

Propagation From easy to hard: Cutting Plant division Grow from seed Grafting (Trees) Cutting Take cuttings from new growth.  The part of the stem that forms new roots and shoots is called a node. These growing points produce leaves, flowers or shoots when the plant is growing normally but, if a bit with two or […]


Kerbal Space Program – How to get to orbit

September 30, 2016

In a nutshell, first we initiate a Gravity Turn.  We make sure not to exceed Terminal Velocity.  Then we need to get to orbit.  Learn to use the Navball.  When coming down we use Aerobraking.  That’s it, class dismissed. Gravity Turn Terminal Velocity How to Get into Orbit Navball Aerobraking Gravity Turn Getting to space […]


Kerbal Space Program – How to build a rocket

September 30, 2016

What engines to use?  How much fuel to take?  What shape should the craft be?  Stack decouplers or Radial decouplers?  Solid booster or Liquid Fuel Engine?  Let’s start with some basic concepts. Basic concepts Forces There are four forces acting on a craft when in the lower atmosphere within gravity: Thrust, Weight, Lift and Drag. Thrust and […]


Kerbal Space Program

September 28, 2016

Kerbal Space Program (KSP) is a space flight simulation video game where you design and build rockets (and spaceplanes) to launch cute little Kerbal creatures into space. This shouldn’t fly?! Kerbal Space Program is like buying a self-assembly Space Shuttle without instructions. And to make matters worse, the program does little to stop you from […]


Freedom of speech

September 24, 2016

Freedom of speech is our greatest good as a society.  For individuals it is a two edged sword in that it is both a privilege and a burden.  It is a privilege you get to enjoy but only if you can tolerate it in others – the door swings both ways.  If you expect others […]