Pulse Electronics BV 020-5427.0 transformer

Health warning for electrical engineers: the Pulse Electronics BV 020-5427.0 230 V to 18 V AC transformer gives out a very distorted waveform on its secondary side even under no load:

The crappy waveform from the Pulse Electronics BV 020-5427.0 230 V to 18 V AC transformer.

The crappy waveform from the Pulse Electronics BV 020-5427.0 230 V to 18 V AC transformer, even …

Creating an op-amp 1/f noise spectra in code

So-called \(1/f\) or "pink" noise is noise with a power spectral density that is inversely proportional to frequency. It manifests itself in op-amps as both an input voltage and input current noise, where it is commonly called flicker noise. It is typically characterised on op-amp datasheets in terms of …

Bypass cookie permission dialogs on websites in Firefox

Since GDPR was introduced in the EU, users in Europe have been bombarded with requests to give permission to websites to store cookies to track your movement around their sites and networks. Usually, the form this permission request takes is a dialog that immediately pops up when you load the …

Start Firefox with a temporary, throwaway session, with no add-ons

This is a handy trick for starting a new, temporary profile on Firefox on Linux to use websites that break when you block their privacy invasion.

I heavily lock down my Firefox settings to block trackers, isolate websites from loading third-party content and setting cookies, blocking supercookie techniques such as …

Tony Parsons, missing person

Update, 2018-10-10: there has been a great discussion over in a thread I stated on reddit. Thanks to the visitors from reddit, and for the great discussion there!

Just over a year ago on 29th September 2017, Tony Parsons, a 63 year old former navy officer, undertook a cycle trip …

Pixel cryptography

Whenever someone at the AEI defends their PhD thesis, their friends construct an elaborate hat. In the celebrations after their presentation, they have to wear it. Over the years, the hats have evolved from simple constructions with a few themed items or pictures, to hats featuring LEDs, sounds and other …

New website

You are reading this on my shiny new website. I decided that WordPress, while awesome for big sites, is overkill for such a small place. What pushed me over the edge was my recent realisation that WordPress updates my site more frequently than I do. Plus, when I look at …

Passing the DVSA theory test

I recently passed by DVSA theory test, which is a requirement for sitting the practical driving test to legally drive on UK roads. I booked my theory test 3 days ago, grabbing a last minute slot for earlier today, having not studied before then. Normally the waiting time is around …

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