capacitorselect.blogspot.com
Electrical capacitors: Tantalum Capacitors
http://capacitorselect.blogspot.com/2011/04/tantalum-capacitors.html
Tantalum capacitors are polarised and have low voltage ratings like electrolytic capacitors. They are expensive but very small so they are used where a large capacitance is needed in a small size such as mobile phones or laptop computers. These capacitors have increasingly become an important as the demand for ever smaller electronic gadgets has grown. Columbite-tantalite - coltan. مرسلة بواسطة ELECTRONICS BLOG. كتابة مدونة حول هذه المشاركة. 8207;المشاركة في Twitter. 8207;المشاركة في Facebook. A capacito...
capacitorselect.blogspot.com
Electrical capacitors: Polypropylene capacitors
http://capacitorselect.blogspot.com/2011/04/polypropylene-capacitors.html
This capacitor uses thin polyester film as the dielectric.They are not high tolerance, but they are cheap and handy.No polarity, mainly used when a higher tolerance is needed then polyester caps can offer. This polypropylene film is the dielectric.Very little change in capacitance when these capacitors are used in applications within frequency range 100KHz. Tolerance is about 1%. Very small values are available. مرسلة بواسطة ELECTRONICS BLOG. كتابة مدونة حول هذه المشاركة. 8207;المشاركة في Twitter. 160; V...
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Electrical capacitors: Metalized Polyester Film capacitors
http://capacitorselect.blogspot.com/2011/04/metalized-polyester-film-capacitors.html
Metalized Polyester Film capacitors. No polarity, dielectric made of Polyester or DuPont trade name "Mylar". Good quality, low drift, temperature stable. Because the electrodes are thin they can be made very very small. Good all-round capacitor.Care is necessary, because the component lead easily breaks off from these capacitors. Once lead has come off, there is no way to fix it. It must be discarded. مرسلة بواسطة ELECTRONICS BLOG. كتابة مدونة حول هذه المشاركة. 8207;المشاركة في Twitter. 160; Variable cap...
capacitorselect.blogspot.com
Electrical capacitors: Variable capacitors
http://capacitorselect.blogspot.com/2011/03/blog-post_30.html
مرسلة بواسطة ELECTRONICS BLOG. كتابة مدونة حول هذه المشاركة. 8207;المشاركة في Twitter. 8207;المشاركة في Facebook. 8207;المشاركة على Pinterest. الاشتراك في: تعليقات الرسالة (Atom). Tantalum capacitors are polarised and have low voltage ratings like electrolytic capacitors. They are expensive but very small so they are. This capacitor uses a thin polyester film as a dielectric. Not as high a tolerance as polypropylene, but cheap and handy, temperature stab. Metalized Polyester Film capacitors.
transistorselect.blogspot.com
Transistors: Regulator
http://transistorselect.blogspot.com/2011/04/regulator.html
Voltage regulator ICs are available with fixed (typically 5, 12 and 15V) or variable output voltages. They are also rated by the maximum current they can pass. Negative voltage regulators are available, mainly for use in dual supplies. Most regulators include some automatic protection from excessive current ('overload protection') and overheating ('thermal protection'). Please see the Electronics in Meccano website for more information about voltage regulator ICs. مرسلة بواسطة ELECTRONICS BLOG. P hysicis...
transistorselect.blogspot.com
Transistors: Types of transistor
http://transistorselect.blogspot.com/2010/11/blog-post_9599.html
There are two types of standard transistors,. PNP, with different circuit symbols. The letters refer to the layers of semiconductor material used to make the transistor. Most transistors used today are NPN because this is the easiest type to make from silicon. If you are new to electronics it is best to start by learning how to use NPN transistors. The leads are labelled. Is two transistors connected together to give a very high current gain. Field-effect transistors which are usually referred to as.
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Transistors: Bipolar Junction Transistors
http://transistorselect.blogspot.com/2010/12/blog-post.html
The most common type of transistor is a. Bipolar junction transistor. This is made up of three layers of a semi-conductor material in a sandwich. In one configuration the outer two layers have extra electrons, and the middle layer has electrons missing (holes). In the other configuration the two outer layers have the holes and the middle layer has the extra electrons. Layers with extra electrons are called. N-Type, those with electrons missing called. Bipolar junction transistors are typically made of.
transistorselect.blogspot.com
Transistors: Darlington pair
http://transistorselect.blogspot.com/2010/12/blog-post_8468.html
This is two transistors connected together so that the amplified current from the first is amplified further by the second transistor. This gives the Darlington pair a very high current gain such as 10000. Darlington pairs are sold as complete packages containing the two transistors. They have three leads ( B. Which are equivalent to the leads of a standard individual transistor. You can make up your own Darlington pair from two transistors. For TR1 use BC548B with h. For TR2 use BC639 with h. P hysicist...
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