visitors this year: 839 The Sonoff POWR2 can replace the timer on a hot water immersion heater. This model also measures electricity as volts, amps and current. This feature provides the key to saving...
visitors this year: 1,098 Dupont leads connect up projects. They come as male to male pin / female to female / male pin to female types. You can solder the male ends to a...
visitors this year: 1,339 Domestic hot water can be heated by a gas or oil central heating boiler or by an electrical immersion heater. I take advantage of half-price nighttime electricity and use an...
visitors this year: 66 ready dec 2020
visitors this year: 633 A Raspberry Pi is a small low power computer that hopefully has a use that chimes for you. I don’t think you’d want to use a Pi for emails and...
visitors this year: 321 “… It’s an ESP32. Yes but which?” ESPRESSIF is the company that markets chips such as the ESP8266 and ESP32 and ESP32-CAM. Other companies buy those chips and fit them...
visitors this year: 382 There are a variety of camera types to help monitor the drive, a pet, a baby, a device, a bird feeder – whatever. You might want to know what’s eating...
visitors this year: 182 Here’s how to add a little functionality to Home Assistant, the automation platform. Do try this especially if you’re just starting to add features to Home Assistant. speedtestdotnet: scan_interval: hours:...
visitors this year: 1,358 Travel information can be one of the things you need easy access to. If you have Google Home or Alexa you’ll find it helpful to recall the exact way to...
visitors this year: 581 When you have a few smart devices you meet a need to be able to see them easily. We might have a camera pointed at the front door but it’s...
visitors this year: 1,650 The Xiaomi Mijia sensor runs for ages on a AAA battery and it can be stuck to a wall to show the temperature and humidity. It’s an attractive Bluetooth Low...
visitors this year: 866 The LED striplights in a kitchen use 12v transformers and they are powered through smart plugs / sockets. The sockets are by TP-link – and they remember their on-off state...
visitors this year: 4,893 fit a sensor to the electricity meter for a minute by minute readout The UK electricity meter shows electricity use in kWatt hours, and a human sometimes pops by to...
visitors this year: 138
visitors this year: 8,201 make a heating oil tank level sensor that’s more useful than anything you can buy There is a replacement for this project – the latest project uses a DFROBOT A02YYUW...
visitors this year: 306 The Home Assistant sensor graph offers painless autoscaling with options to set detail and timespan. But how do I alter the data itself? A car fuel tank measures in gallons...
visitors this year: 16,501 how much heating oil do I use each year? Of course it depends but reckon on needing to order 1000 to 1600 litres a year for heating your rooms and...
visitors this year: 1,202 A volume control at hand and ready to turn. Bash the top and the video or track pauses. Double bash to skip to the next track. It’s plug and play,...
visitors this year: 122 Weather station With a data logger several sensors can be used together to monitor the weather over periods lasting weeks. Suitable sensors include temperature, pressure, humidity, light or even a...
visitors this year: 208 Burning a candle As a candle burns oxygen is used and heat and water are produced. A few sensors can be used to monitor this process – including a light...
visitors this year: 433 Thermometric titration As acid reacts with alkali the pH changes and heat is evolved. This heat of neutralisation can be easily monitored using sensors – to produce a graph of...
visitors this year: 116 Acid-base titration As acid drains into alkali the pH changes. This can be monitored using a pH sensor to instantly produce a graph of pH against volume. The volume of...
visitors this year: 135 Rates: marble and acid Apparatus Clamps, bosses, & stands, marble pieces (large, medium and small sizes), 1M hydrochloric acid HCl, flask, bung, delivery tube, a good gas syringe. Interface, position...
visitors this year: 1,038 Rates: Thiosulfate and acid Sodium thiosulfate and acid react to form a precipitate. The light sensor can be used, like a colorimeter, to monitor the rate of the reaction. In...
visitors this year: 201 Exothermic reactions A temperature sensor can collect information about the heat generated when lime is mixed with water. Exothermic reactions are used in a glove heating pack. The proportions of...
visitors this year: 171 Heat of reaction As acid reacts with alkali, heat is evolved. This is the heat of neutralisation. This can be easily monitored using a temperature sensor. In this experiment the...
visitors this year: 136 Absorption of thermal radiation A shiny surface and a black surface absorb heat differently. Using temperature sensors or thermocouple probes it is possible to compare the temperatures on two these...
visitors this year: 59 Oscillator motion A position sensor is attached to a weight and spring assembly as shown. This can be used to study simple harmonic motion and the effects of changing the...
visitors this year: 134 Extension of a spring A position sensor is attached to a weight and spring assembly as shown. This can be used to graph the extension of the spring with increasing...
visitors this year: 246 Cooling curve Two temperature sensors can collect some interesting information about cooling during a change of state. In this experiment the temperature of a water bath increases as a substance...
visitors this year: 55 Heat insulation A temperature sensor can be used to study the insulating properties of different materials. Two temperature sensors allow a simultaneous comparison to be made. In this experiment two...
visitors this year: 72 Heat conduction A temperature sensor can be used to study the conduction of heat through different materials. Two temperature sensors allow a comparison to be made. In this experiment strips...
visitors this year: 69 Pressure & temperature How pressure changes with temperature can be monitored using sensors. A graph of pressure against temperature can be plotted as it happens. After the experiment, the scale...
visitors this year: 105 Capacitor charge and discharge The voltage & current of a capacitor are measured as it charges and discharges. Sensors allow a graph to be plotted as this happens. The effect...
visitors this year: 137 Current-Voltage relationships In this experiment the resistance of a lamp, resistor or diode is measured as the current is varied. Voltage and current sensors make the measurements while the software...
visitors this year: 146 Thermistor characteristics The voltage & current of a thermistor are measured as its temperature changes. Sensors allow graphs of voltage and current to be plotted against time. Not only can...
visitors this year: 69 Heating effect of an electric current The temperature, voltage & current of a heating unit are measured over a period of time. This allows us to calculate the power of...
visitors this year: 71 Battery life In this experiment an electrical cell is tested to exhaustion. The cell might be a dry-cell, an alkaline cell or a lead-acid accumulator. The decreasing voltage is measured...
visitors this year: 120 Seismometer The magnetic field sensor responds to magnetic fields. We can use this idea, together with a metre rule damped with a sand bag, to demonstrate how a seismometer might...
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