The rapid scientific progress of the twentieth century did not pass by the clock. In 1821, the French master Nicolas Mathieu Rieussec created the first publicly available chronograph, an order for which came from King Louis XVIII (Louis XVIII). The first mechanical timer in 1816 was invented by Louis Moinet. In order not to miss a single drop of time, the watchmakers constantly improved their devices. From that moment on, the price of a minute only grew, and in 1670 the English watchmaker William Clement built a stopwatch. The familiar mechanical watch with hands appeared in China in 725 AD, designed by the masters Yixing (行) and Liang Lingzan (梁 令 瓚). Only a thousand years remained until the invention of the mechanical movement. The hourglass was invented around the 3rd century BC in the Middle East and Ancient Greece. Chinese and Indian water timers acted the other way around - an empty hemisphere with a small hole at the bottom, floating in the pool, gradually filled with water. In Babylon, Ancient Egypt, and Ancient Greece, water slowly flowed out of a filled vessel. The water clock helped people count the hours and minutes for a long time - the clepsydras heard the speeches of ancient Roman orators and helped the kings to be punctual. From the glass cylinder, water flowed out in a thin stream, perhaps then the expression "time is up" appeared. In the Middle Ages, time was measured by marks on candles.Ĭlepsydras or water clocks appeared about half a millennium later than the fire ones, they were invented by the ancient Babylonians and Egyptians.
After the invention of glass, the functions of the fire clock were transferred to lamps with marked divisions - minutes and hours ran away along with the burnt out oil. When the stick decayed to the mark, the ringing of the ball that fell on the stand was heard. Metal balls were often attached to the marks. Sticks or spirals with marks were made from the mixture. The dry wood was ground into powder and mixed with incense. About 3000 years ago they were used in China, Japan, India, Greece and Persia. The ancient ancestors of timers are fire clocks. After the specified time has elapsed, an audible signal sounds. One thing to note is that it can take around 3 mins to turn the rads on/off with these valves so may need to offset the temp that turns them on/off by a degree or two to stop the room getting too hot.Timer is a device that measures a specified time interval from the moment of start. Sorry that the above is a wall of text! It’s just a concept at the moment, but I can’t see why it wouldn’t work? You can then put a random temp sensor of your choice into the room, and then get home assistant to turn power off to the radiator when the room is up to temp (you could even wire in a PIR to the sonoff so if there is motion in the room it will turn the radiator on).Īs a bonus I plan on using the button on the sonoff to act as an override so if it’s a lot colder outside and you feel chilly, you can press the sonoff button and it will turn on the boiler and radiator for an hour or so, or until its a few degrees warmer. Wire those into/through a Sonoff, and into a 13amp plug (downside = you lose a plug, and it must be near the radiator). Which are two wire normally closed, and M30 thread, so should screw straight onto where the existing TRV is on your radiator (provided youve had valves in the last few years). # by leaving out initial, the time is restored from recorder
In due course, I will post a link to my whole configuration! As i have separated my config, it will all need placing in its own areas in your own config, should you choose to give all of this a go.
#SET A TIMER FOR 10 45 CODE#
Ive placed all of my YAML code into one set of code which is below. To top it off, ive set up an Alexa skill to be able to do all of this via voice. When the sensor value changes, an automation sets the climate based on its output.
The output of my sensor is then used for an automation. these checks are based on the Input select timers, and the binary sensor. Climate is set for the lounge, and i have created a sensor which has a long convuluted check, to tell me which part of the week we are in. I use Input Select to set my timers, Input Number to set my temperatures and have ’īinary sensor’ set up to tell me if we are on a weekday or a weekend. I have a Sonoff basic controlling the heating as a switch, and a DHT11 connected to a sonoff in my lounge, to give me my heating zone which is the area i use to base my heating on. Ive had a look around on occasion, and never found a complete option for a central heating system, that has adjustable timers, weekday and weekend settings, and the stuff youd like from a HIVE like system.
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