Wednesday, December 1, 2010

My first day and lm555 timer datasheet

lm555 timer datasheet


The series of UC 3842, 3843, 3844 and 3845 Oscillators can be used to generate sync pulses which no need to have a lot of external components. Tags: , , This entry was posted on Wednesday, December 1st, 2010 at 12:29 am and is filed under .
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Ironic fact about lm3914n datasheet

lm3914n datasheet


That could be controlled by the RC time of the ramp generator. You can make a simple ramp generator from a CMOS logic IC that has a Schmitt-trigger input an an inverting output, like a 4093 quad NAND gate or 40106 hex inverting buffer, a couple of diodes, a resistor, a capacitor and a pot. A better linear ramp generator can be made using an LM555 timer IC. In the 555 ramp generator, R1 controls the speed. Both ramp up and ramp down are generated at the same time. In RampGenerator2, R2 controls the speed, and S1 controls the ramp direction. The ramp is not nearly as linear as the 555 ramp generator, and when switching directions pot R2 works backwards from the other mode. If you really want to control ALL of the nuances of your LED ring, you can get much more precise control using a microcontroller, and wind up using just a very few parts.
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Top news lm35 datasheet

lm35 datasheet


By using operational amplifier IC741 we can make a digital thermometer circuit which can measure temperatures up to 150C. See completely about How to set up Digital Thermometer Circuit Diagram using IC741 , in full pdf source: Tags: , , , , This entry was posted on Saturday, November 27th, 2010 at 12:19 am and is filed under . , , ,
lm35 datasheet
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Turn lm340t12 datasheet

lm340t12 datasheet


In fact you can pay more for a TO-92 type rated at 100 ma than you would for a TO-220 type rated at 1.5A When you have a requirement for a project of say 12V, or even 5V if it's a digital project, then these are the types you use. Now the first thing I'm going to recommend for small projects, is discard everything to the left of the four diodes D1 - D4 and use a plug pack wall wart in US . The type of regulator discussed here LM340-12 or 7812 types REQUIRE a minimum input voltage to function and there is a maximum they will accept. Just remember to buy a plug pack which will deliver at least the minimum required input voltage at your current requirement don't buy without first scrounging around your relatives, friends and neighbours - recent statistics must surely indicate there are more plug packs around than there are people on this earth . Hokay!, I just found a 15V D.C plug pack capable of 1A Suits me fine for my project. I also have on hand a 4700uF / 25V , this is also fine and I have a LM340-12 regulator of the TO-220 type as well. A decent heatsink needs to be connected to the IC because if you are drawing appreciable current AND your input voltage is getting higher then the IC starts to dissipate a fair bit of . The socket depicted is a panel mount type to suit the plug pack plug, you could dispense with that by bringing wires directly into project box but then your plug pack can't be used for something else! I'm NOT going to get into that because there are more problems here than there are in a can of red backs black widows . as I don't have such a requirement I'm not about to spend the money on it megabucks to say the least - and largely forget surplus power supplies because they create other problems . This is straight from a National Semiconductor data sheet, will supply a variable voltage 1.2V - 25V and up to 10A I will assume you obviously have available a source of D.C.
lm340t12 datasheet
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Monday, November 29, 2010

Whats is la4440 datasheet

la4440 datasheet


hịc, main thì có sẵn ráp vô là chạy thôi ai chả làm được, nhưng mà nó hoạt động ra sao chức năng từng con R, bass , trep nằm chổ nào, tín hiệu đi ra sao thì chắc gì đã biết.
la4440 datasheet
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Thursday, November 25, 2010

Have you christmas day song

christmas day song


Christmas Day is the most important festival in the west. Do you promise yourself each and every year that you will get all your Christmas shopping done early so that you can have a relatively stress free holiday season, only to find yourself shopping for last minute Christmas presents a day or two before Christmas Day and having no idea what to get or where to get it. The only way to have a stress free holiday season is to early Christmas shop for the best Christmas gifts. If you have no idea what holiday gifts to get and what would make great holiday gifts, find suggestions on or offline on the best gift ideas and where to find them or pay attention to any hints dropped by family and friends in order to prepare a list of the best Christmas presents. Online shopping is continuing to explode and while you do not deal with the crowds, you need to place the orders early to ensure that you receive the best Christmas presents well before Christmas Day especially if you need to mail some of these holiday gifts. Plan to shop early to avoid the stress of wondering whether you will receive the Christmas presents before Christmas. Although some online stores can gift wrap and mail the Christmas present to the recipient for you, I prefer my own wrapping and you do not want the recipients to receive the Christmas presents too early or too late.
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What is christmas day portuguese

christmas day portuguese


Christmas is a Christian holiday that celebrates the birth of Jesus. Christmas has always been represented by religious ceremonies and gifts and greetings exchange. Over the centuries, Christmas has evolved and Christmas Eve with our family, replaced the religious ceremonies. In Belgium, Christmas is rather reserved for adults: the streets are decorated and illuminated, we decorate our houses, windows, gardens, Christmas trees. In the Belgian Ardens, people celebrate December 31st and not Christmas. French people have lots of Christmas customs: Christmas Markets, the Christmas tree, the Christmas Dinner, Père Noël, Christmas gifts, stories, songs, Christmas turkey, The Christmas Crib, the Yule Log, and so on. Dutch people reserve the big gifts for Christmas Time because they profit for some great bargains after Sinter Klaas. Children sing Christmas Carols in the streets, they eat the famous Christmas Pudding at the end the Christmas Dinner. The windows of the shops are filled with lots of gifts and Spanish celebrate the Christmas Evening with their family. If there is no Christmas tree in Portugal, there is nevertheless a Wooden Christmas . However, Christmas traditions vary from one region to another one and, depending on the region it is Babo Natale Father Christmas or the Gesu Bambino Little Jesus who brings gifts on December 25th. During the Christmas Dinner, Scandinavian people reserve a place for the souls of the deceased members of their family. The whole family is singing Christmas songs and dance around the Christmas tree. In Greece the Christmas period begins on Christmas Eve and ends at the Epiphany. American people love to celebrate Christmas and set up a decorated Christmas in their home. Children hang empty stocks empty on the fireplace and on the Christmas morning they find them filled with candy and small toys. Canadian people decorate their house with a Christmas tree, a Christmas wrap, a Christmas Crib . After the Midnight Mass people have a Christmas Eve with their family. Turkey and the Christmas log are the essential ingredients of a Canadian Christmas Dinner. Peruvian people have Christmas parties but also learn to live better on christmas time. Mexican people celebrate Christmas with Las Posadas pilgrimages representing the path by the Mary and Joseph . They celebrate the last Posada on the Christmas morning and then start the Christmas dinner. I Guatemala, immigrants have imported their German customs and the Christmas tree is essential but the Christmas gifts are reserved to the children. Christmas happens during the summertime, so Australian people celebrate Christmas at the beach. If there are few decorations, New Zealand people organize Christmas parades and people sing in the parks. If Christmas Day is not a holiday, Christmas is celebrated in Chinese cities. For the Chinese people who celebrate it, Christmas is a religious event.
christmas day portuguese
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