Recently in Home Category

I've moved to a flat in Edinburgh. It's in the city centre near the trams, train station and with plenty of bus stops on many different routes.
I've got the internet connection set up,

adjusted the drawers in the kitchen,

and managed to get a TV signal indoors.
There are four bedrooms so I still have a guest room as well as study/computer room and a small dining area as part of the kitchen.

After leaving the freezer door open all evening twice in hot weather in previous years I started working on a fridge/freezer door alarm to warn me if this happens again. My model of fridge/freezer happens to have convenient anchor points for this:

Using an ESP32-C6 I've made the "Eightfold Seal" device that supports two doors and a buzzer alarm with increasing frequency when the door is left open. It communicates using Zigbee allowing remote configuration and status information, as well as the possibility to cancel the current alarm if the door is intentionally left open.

When either door is open even slightly, this is detected and the buzzer will sound after a delay. Here are some videos with the buzzer configured for no delay to demonstrate the sensitivity:

I had to print a custom lower profile insert for the freezer door because there's a mat nearby and very little clearance below the door because of that:

With a recent oven purchase I only had one device left that required the clock to be manually synchronised - a timer that I use to turn a light on in the morning. Having had to replace some remote controlled sockets with Zigbee variants I decided to do the same with the light timer so that it can be controlled by a computer that always has the correct time.

That worked ok but I wanted more integration with the light switch and since my living room lights could already be remotely switched by a different system I have consolidated both of them into a single light controller. There aren't any existing solutions for this that can handle multiple lights and multiple switches (you can have one relay/switch, or multiple relays plus multiple switches but Zigbee doesn't guarantee good integration in that scenario).

Using an ESP32-C6 I've made my own solution, the "Candle Dribbler" that satisfies my obscure requirements for how remotely controllable light switches should behave:

My existing fridge and freezer are over 20 years old and there are better insulated quieter models available that use less than half as much electricity.

Being under the worktop without any rear ventilation uses 25-30% more electricity too because the heat has nowhere to go. The fridge also becomes a freezer in the summer because the trapped heat at the back affects the internal thermostat resulting a feedback loop until my carrots are sitting in a frozen pool of ice.

Not enough space

Before I can get a new fridge and freezer they need to fit under the worktop. There are two popular widths for these appliances (55cm and 60cm) and both of the existing ones are 55cm wide in a space designed for that size only. In order to get the models that I want to fit I need to find an extra 5cm of space because the new fridge is only available in 60cm wide.

The cabinets to either side are made of wood so I took one of them out and made it 5cm narrower:

The cabinet doors are now too wide for the cabinet so one of them needs to be made smaller:

There's now an extra 5cm of space so I can fit a 60cm and 55cm appliance under the worktop.

Not enough ventilation

The instructions for the new fridge and freezer come with warnings of damaging the compressor if there's no ventilation at the back. Some of the heat can escape over the top (to the front of the worktop) but not enough to stop an excessive build-up of heat in the summer.

I cut a long narrow ventilation hole in the back of the worktop and laser cut a cover for it out of plastic:

There's now enough ventilation for the heat to escape at the back. Be careful doing this with old appliances because my freezer immediately developed a condensation problem now that the excess heat was no longer warming the outer surfaces.

New fridge and freezer

With all the worktop and cabinet alterations complete, I can now install the new fridge and freezer:

These smoke alarms look like they're as old as the house itself:

I put some other alarms up in 2015 and moved these ones into bedrooms but they were in need of replacing.

There are new minimum standards for fire alarms in Scotland that come into effect on 2021-02-01 that require interlinked smoke alarms in the main living area and hallways/landings as well as a heat alarm in the kitchen.

None of the other alarms are interlinked so I've replaced all of them with mains powered interlinked alarms. There's even a control panel to make the entire house start beeping or identify which alarm is detecting fire when it's not obvious:

I'll automatically get an email if a fire is detected.

The hot water in my house used to be provided by an immersion heater fed from a cold water tank in the loft (2 decades ago) and was distributed by 22mm pipe. When a gas boiler was installed the original pipes were left in place.

Having recently had the boiler replaced (with a higher maximum hot water output) I investigated what I could do to reduce the time taken to get hot water out of the tap and discovered that the 22mm pipes leading out of the cupboard went further than expected.

A 22mm pipe holds more than twice as much water as 15mm pipe so this results in a lot of unnecessary water in the pipes between the boiler and the taps. While this has little impact on the shower (mostly fed by newer 15mm pipe), it doubles the time taken for hot water to reach the tap in the sink because almost the entire run was in the old 22mm pipe (7 metres of it).

Even at a fast flow rate of 6 litres per minute that's an unnecessary additional 13 seconds for the hot water leaving the boiler to come out of the tap in the shower room and an extra 8 seconds for the kitchen sink at 10 litres per minute.

All of the 22mm pipes have now been replaced with 15mm pipes and the hot water now reaches the tap faster:

I've used a laser cutter to engrave a light switch with symbols for the two switches outside my shower room:

• Shower light and extractor fan
• All other lights in the room

More electric sanding, the remains of my mahogany wood stain and rubber feet... the second bench is now complete and back in the garden:

I've now added rubber feet (solid rubber door stops) to the first garden bench and put it back outside:

I've recently installed an 80A Power Meter on the electricity supply to my house. It measures the current active, reactive and apparent power as well as providing a count of the total active and reactive energy. These reading are updated every second.

After installing a 100A isolator and pulling through extra cables, the installation of the power meter was relatively straight forward. It's in an enclosure with an 80A circuit breaker, located inside to avoid inconvenience if it ever trips and because the distribution board doesn't have enough space for it.

I intend to write an Android app for a real-time view but for now I'm just collecting historical data: