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.

Photon Control of a MOSFET

This tutorial builds upon both the code base and circuitry as developed with the Particle.publish() and Particle.subscribe() example. This time around instead of registering a subscription that can …

Photon Publish and Subscription Events

This post introduces the use of the Particle.publish() and Particle.subscribe() events to enable photon devices to communicate via the Particle Cloud. This post acts to lay the groundwork …

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 …

Official Arduino Robot Compatible Servo Plugs

In a previous post I demonstrated how to prepare sensors and components such as Sharp IR’s to be compatible with the servo plugs and the servo wiring convention. …

Simple Bluetooth Joystick

In this post I will introduce a couple of Arduino scripts and the accompanying circuitry needed to make a very simple Bluetooth joystick. The first script simply provides …

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 …

Sharp IR Servo Plug Tip

This post is really a tip rather than a tutorial. Within it I will demonstrate how I prepare sensors and components such as Sharp IR’s to be compatible …

Ratchet & Clank – Power Harness

Today my attention turned towards a means of providing power for my servo based 3D printed robots, Ratchet & Clank. In order to achieve this I first off …

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 …