@tomasmcguinness

@tomasmcguinness

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  • Got my LDO the wrong way around!

    Nov 14, 2025

    ·

    Electronics, Personal Project
    Got my LDO the wrong way around!
  • Avoid Outdoor Temperature Sensor Mistakes: My Own Experiences

    This came as a surprise to me. My kitchen extract fan and my bathroom extractor fan have been interfering with my outdoor temperature sensor! I’m using an Ecowitt Temperature sensor (https://amzn.to/4i2dNCf) mounted on an enclosure (https://amzn.to/4fH2yxy). I don’t have the waterproof version of the sensor, which is also available. I… Read ⇢

  • Adventures in low temperature heating

    In this video, I give a brief explanation of that low temperature heating is and how I’m able to heat my 1950s home with radiators at between 30 and 40 degrees Celsius! If you’re interested in getting more performance from your boiler or want to better understand how low temps… Read ⇢

  • A brief update on my radiator sensors

    As we’re now (almost) back into the heating season here in the UK, I thought it would be worth posting a brief update on my radiator sensors project! The aim of this project is to develop a set of sensors that connect to the flow and return pipes of a… Read ⇢

  • How I stopped my Zappi from draining my battery (2nd edition)

    In this video, I break down the role that CT clamps play when it comes to EV chargers and Solar Inverters. Read ⇢

  • My DIY Air Source Heat Pump Installation Journey

    In February of 2024, I decided I was going to have a go at installing my own Air Source Heat Pump. To give me the best possible chance at doing a quality install, I’m going to go very slowly and do all the assessments and blocks of research in a… Read ⇢

    My DIY Air Source Heat Pump Installation Journey
  • Finding and fixing an issue with a 2-port zone value, which caused my boiler to fire erratically!

    Read ⇢

  • The importance of boiler sizing!

    In my last video, I poke a little fun at my oversized boiler before diving into the importance of sizing your boiler correctly! Read ⇢

  • High CO2 Levels at Home

    In this video, I discuss the discovery of high CO2 levels in my house at night and how I’m wondering if they are impacting our sleep quality. Read ⇢

  • Installing a Home Assistant Control Panel in my kitchen

    Read ⇢

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About the BLOG

Welcome to my blog. It’s a jumble of all the things that take my interest. Follow along as I explore smart home technology, home heating and various bits of DIY.

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@tomasmcguinness

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