a drop in the digital ocean: blog

Hello and welcome to a drop in the digial ocean. Here you can find a current total of 54 postings about making, robotics, microcontrollers and other geeky stuff.

A Simple Voltage Divider Circuit

Here we have a quick repost of a tutorial which I originally developed for the IoST project that I worked on back in 2015/2016. The tutorial details how …

Capacitive Sensor Development Board

This tutorial details how to make a simple breakout for the Arduino CapacitiveSensor library. The library turns two or more pins of an Arduino pins into a capacitive …

Ratchets Headlight Prefab

In this post I will introduce some code developed for controlling Ratchets Headlights. The presented script extends the growing C# Mono Ratchet library of scripts for Unity3D and …

Basic Differential aka Tank Drive

With the Ratchet hardware build now complete, my developmental focus has turned to the software needed to run him. First up of course has to be getting him …

Unity3D Serialport Script

This post presents a script and or prefab developed to allow drag and drop capability for serial communication within the Unity3D game development ecosystem. This in turn allows …

ServoBot LED Headlight & Sharp IR Bumper

In this post I will demonstrate the assembly of the bumper for my current robot build Ratchet. The bumper contains both a Sharp IR distance sensor (for obstacle …

Arduino and the Sharp IR Proximity Sensor

In my last post I demonstrated how I modified a couple of Sharp IR sensors for use with my ServoBot Shield. It recently dawned on me however, that …

The ServoBot Shield

Last month I published a post detailing the construction of a power harness for my servo based robots Ratchet and Clank. The harness is used to connect one …

Building a Calibrated Tilt Compensated Compass with the LSM303

The LSM303 Breakout is a nice little compass module that consists of a triple axis accelerometer and a triple axis magnetometer. When used together this combination of sensors …