Showing posts with label Introduction. Show all posts
Showing posts with label Introduction. Show all posts

Thursday, December 12, 2013

An Introduction to Bidding and Buying on eBay.




Have you noticed that whenever you open a newspaper, watch the TV or have a conversation, people seem to be talking about eBay? If you've never used it and you've no idea what it's all about, then the chances are that you're starting to feel a little left out. But don't worry! This email contains everything you need to know about the basics of bidding and buying on eBay.





So What is eBay?





eBay is an online auction website - and not just any auction site, but the biggest one in the world. If you know how an auction works, then you already know how roughly eBay works. Someone adds something they want to sell to the site, and then buyers come along and place bids on it. The highest bid wins the item! It's that simple.





eBay being an online auction makes a big difference, though. Buying and selling are not reserved for any elite. eBay accept almost any item, no matter how small, and will then advertise it on their sites all over the world. It's a powerful combination of an auction and a slightly chaotic marketplace.





What is Bidding?





Bidding is when you say how much you will pay for an item in an auction. Bidding on eBay, however, doesn't work in exactly the same way as a normal auction, at least in theory. On eBay, you tell the site what the maximum you are willing to pay for each item is, and then eBay places the bids on your behalf. That means you could say you were willing to pay up to $100 for something and only have to pay $50, if that was the highest maximum bid anyone else placed.





It's not as complicated as it sounds - the best way to get used to it is to give it a try. First, the best thing to do is to go to the eBay website designed for your country. If you don't know the address for it, just go to www.ebay.com and it will tell you there. Now, on the front page you should see a big box marked 'search': just type in anything that you'd like to buy there.





Wasn't that easy? Now you should have a list of items for sale in front of you, along with how much people are currently bidding for them and the time when bidding ends for each item. If you click one of these, you can read the description, and then - if you're happy with the item and happy to pay more than the current highest bidder is - you can bid!





How Do I Bid?





Go ahead and scroll down to the bottom of an item's description page, and type the maximum you are willing to pay (your maximum bid) into the box. Then simply press the 'place bid' button - you will need to sign in once you press the button, or go through a quick registration process if you don't have an eBay username).





If someone else's maximum bid on that item is higher than yours, then eBay will tell you and give you the opportunity to bid again. Otherwise, you're now the new highest bidder! All you need to do now is wait until the end of the auction - if someone else outbids you, then eBay will email you and you can bid again.





All sounds great, doesn't it? But by now you might be wondering whether a site as chaotic as eBay can really be all that safe to buy from. That's why the next email in this series will be about your rights when you buy from eBay.


Wednesday, November 27, 2013

An Introduction to Lightwave RF Home Automation


Low Cost Home Automation with LightwaveRF


LightwaveRF is a low cost radio frequency home automation system. It is one of the easiest systems on the market to install, making it popular with DIY enthusiasts. The company behind this system began by specialising in advanced lighting control - but the system is growing fast and new features are on their way.


Direct competitors include wireless systems such as Z-Wave and Zigbee.


This article will introduce the reader to the main features, products and technical specifications for LightwaveRF home automation.Unique Products and Features


One of the most unique features of Lightwave RF is the company's remote controlled dimmable light bulb. This is the only bulb available on the market which is directly networked into your home automation system without the need for an additional receiver / transceiver. Although this obviously does mean that you need to buy replacement bulbs from the firm, they are not expensive and there is a very low entry price for your initial system set up. The fact that you get 20 watt energy saving bulbs which are still dimmable is also a great selling point, as most energy saving light bulbs do not work well, if at all, with dimmers.


The combination of the energy saving bulb with remote controllable power sockets and energy use monitoring technology means that Lightwave RF is offers some of the best energy saving features of any home automation system.Product Range


LightwaveRF currently offers a fairly limited product range compared to its competitors. As I mentioned above there is a great range of products for energy saving and lighting control, but there is very little else. Apart from lighting and power sockets the firm have developed radiator valve acutuators for heating control, which are available for pre-order but have not yet been released.Reliability and Range


Range extenders may be needed if there is a large separation between the controller and the device your wish to control.


Reliability is comparable to many other wireless systems, but does not quite meet the same standard as the z-wave protocol, which uses mesh network topology.Popular Controllers


Many LightwaveRF product come bundled with a remote control, which you can easily use as the primary controller for a basic home automation system.


For more advanced control the main product on the market at the moment is the WiFi Link, which connects your system to the internet and allows you to control your devices through a configurable phone or tablet app.DIY With Lightwave RF


Although the electronics hacking community has not taken to LightwaveRF to the same extent as they have with more advanced systems, there are some handy resources out there for anyone wanting to develop new features for their system using the LRF communication protocol. There is a GitHub library here, or you can find some interesting tutorials like this one which shows you how to create a voice controlled home automation system using LightwaveRF and Raspberry Pi.

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