More about phone (291)

7-03-2010 | Last week the Finish cellphone giant Nokia filed a US patent for a cellphone that recharges through kinetic energy. The cellphone features a...

3-03-2010 | Smartphones and Sustainability turn out to be a great combination. More and more energy management applications are becoming available for t...

1-01-2010 | Once again our workshop project is a true blue recycling project—turning an old telephone router and a wireless front door bell into a wiref...

1-12-2009 | After wrapping up last month's tests we received another couple of very interesting NC (noise cancelling) headphones: a model made by Cr...

1-10-2009 | Background noise can be very irritating while you are listening to music. Fortunately we can get round this these days by using headphones t...

1-09-2009 | Just when you thought mobile phones couldn’t get much smaller Elektor Labs spotted one the size of a credit card and priced just under 17 eu...

1-07-2009 | Jeff Macaulay’s excellent single valve ECC82/12AU7 'Hybrid Headphone Amp' (HHA) published in spurred the author to implement some mo...

1-07-2009 | Until quite recently, you could still find remote ringers that could be plugged into any standard phone socket in order to have an additiona...

1-07-2009 | Here we propose the use of two EL84 (6BQ5) power pentodes in triode SRPP configuration, without an output transformer The reasons for using...

1-11-2008 | Remote control using mobile phones and SMS (Text Messaging) is in great demand but many systems on sale suffer from imperfections. The ingen...