Meteoplug is a client-server. The client application needs minimal storage and computing power, which allows for embedding into `computers` of minimal size and with minimal power demands down to1 watt(depending on efficiency of power supply itcan be 1-2 watts more on mains). These clients upload weather data to a server on the internet which stores it and provides
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a broad range of computations and services. The server application is based on a professional database and can handle hundreds of clients simultaneously. Each user has access to his private weather data and the server application acts like being a dedicated device. The server is a full-fledged computer which consumes quite some power, but by being shared by hundreds of users this just adds another 1 watt on total power consumption per user. On each complete revolution of the 1000th dial a magnetic pulse is emitted from the gas meter. The A3214 hall effect sensor is triggered and the output drops to zero volts. The change is detected at the input of the ICM555 timer IC via the capacitor C2. C2 prevents the input of the 555 timer IC from being held low if the gas meter dial stops at zero. The ICM555 timer is configured as a monostable with time set by R6, VR1 and C1. When triggered by the hall effect sensor the output is held long enough for the Current Cost board to send its output to the CC128 display (around 6 seconds). VR2 can be adjusted to display the power level required on the CC128 display. My gas meter 1000th ring turns in around 18 seconds with my boiler on full power so there is plenty of time for the Current cost board to be triggered and released before the next pulse from the 1000th ring. At present I run the circuit from a couple of AA batteries to get the 3v required and use a low power version of a 555...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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