Science & Technology Archives

An Explanation of Direct And Inverse Proportion

Introduction

At least one of my other posts How Distance Reduces The Power of Radio Waves (not yet published) requires an understanding of mathematical proportionality. In particular it requires an understanding of Inverse Proportion. So I have written this article to try and clarify it. It gives an explanation of the two types of proportion, otherwise known as variation, which are:

Direct Proportion,
Inverse Proportion otherwise known as Indirect Proportion.

14 Pin & 15 Pin “D” Connectors on VGA Cables

Introduction

I wanted to know what the difference is between VGA cables with 14 pin and 15 “D” connectors. I found the answer on the Instructables site/forum. The info I needed was contained in a reply to a query by onrust circa 2010.

Well I got my answer from “ganzieee” at instructables. It was delivered 5 years ago and it follows here.

Extending The Door Bell In My Home

Post Description

How I extended the door bell in my home so it can be heard in the house extension and shed. It’s been done by incorporating wireless technology, while retaining my original 1980s “DING-DONG” door chime which had a great sound and an illuminated bell push.

Converting A Bell Push Light To LEDs

Post Description

How I replaced an incandescent bell push light with LEDs. The bell push operates a door chime powered by AC from a bell transformer.

Lubricating The Heat Sink Fan On A GeForce GTS240

Preface

This post describes: How the cooling fan on an NVIDIA GeForce GTS240 PC display adapter was lubricated to silence it when it became noisy.

I Found Windows 10 Fast Startup Caused Problems

Introduction

The following post will describe how to turn Windows 10 Fast Startup OFF or ON. I usually turn it off on my PCs because I’ve had startup problems as described in the following sections.

Is My Dualit Model DMF2 Milk Frother Corroding?

Introduction

Unfortunately besides my Dualit Milk Frother requiring a repair (see How I Repaired A Dualit Milk Frother Model DMF2) another problem has developed. I have to ask, “Is my Dualit Milk Frother corroding?” If not what is happening to it. Is the brown mark I can see copper or rust?

How I Repaired A Dualit Milk Frother Model DMF2

Introduction

My wife pressed the start button on the Dualit Milk Frother (Model DMF2) one day in the summer of 2017 and it no longer worked. This persisted so we had to heat the milk in the microwave oven for a week or two until we got a new frother.

Of course, me being me, I dismantled the faulty Dualit Milk Frother to see if there was an obvious problem. There wasn’t anything burnt out or blackened. Just a lot of wiring in a very confined space. It was constructed with a flat straight circuit board fitted into a curved space. No-one had used flexible circuit boards here.

The long term solution was to replace the whole Dualit Milk Frother. Since they are still on the market that’s what I chose to do. The faulty one had been a replacement for our Nespresso Aeroccino Milk Frother already mentioned in this blog. We now had to replace the replacement.

Windows 10 File History Is Used To Backup My PC

Introduction

Since the introduction of Windows 10 version 1709, and acquiring a new backup drive, I have chosen to use Windows 10 File History to backup my PC. So far so good. I have used it to backup my data and to restore some..

I will describe how this tool is used from my point of view, but first I’ll give you my history regarding backing up.

Discussing Malicious Website URLs On Twitter

Introduction

I have recently come across an issue where good people wish to convey information about malicious websites to everyone. They’re doing very good work tying to keep us all safe and informed by discussing malicious website URLs (Universal Resource Locators), particularly on Twitter. Unfortunately Twitter creates a link in the text to anything looking like a URL. This means malicious websites that are mentioned by their URLs are given links allowing readers to accidentally go to them.