Engineering and Technology

Here is my YouTube video Hindi version about this circuit: This  BH1417  pll fm transmitter includes features like: pre-emphasis, sound limiter, stereo transmission, low pass filter, pll circuit, fm oscillator and rf output buffer. The sound limiter maintains the same audio level so no distorsions occur, the stereo encoder separates the left and right channel enabling stereo transmission, the low pass filter blocks any audio signal above 15 Khz to prevent rf interference and the pll circuit provides a rock solid frequency stability. There are 14 possible transmission frequencies with 200KHz increments selected with a 4-DIP switch. Starts from 88.7 up to 89.9 MHz and 107.7 up to 108.9 MHz. S4 S3 S2 S1 Frequency 1 1 1 1 88.7 MHz 1 1 1 0 88.9 MHz 1 1 0 1 89.1 MHz 1 1 0 0 89.3 MHz 1 0 1 1 89.5 MHz 1 0 1 0 89.7 MHz 1 0 0 1 89.9 MHz 1 = ON, 0 = OFF Simply select transmissi...

Here is my video supporting this article: Description of Home security system: There are several home security systems out there. Different manufacturers use different techniques and topology in their design. Cameras are also very popular for the purpose of security. Main problem with security cameras is to monitor them. They have capability to record the view in DVR hard drive but they could not stop intruder from intrusion. They are just providing the proof after the incident happens. Whereas in most cases we want to stop an intruder from intrusion. for this purpose different types of alarming systems are developed which warns the intruders not to enter in a specific area. also these system are kind of passive systems which needs only power up and they stays in sort of sleeping mode when everything is normal. They activate an alarm at the time of intrusion. They don't normally need to observe. So such systems are better in the way that all the time monitoring is not needed...

STANDARD AUTOMOTIVE HALOGEN BULBS Here is my YouTube video supporting this article: My YouTube video regarding this article: Halogen bulbs are standard light bulbs used in most automotive applications. Halogen light bulbs have very nice nature light. They provides light quality which is very close to natural light. Halogen light buts uses iodine from halogen group to prolong the lamp life and prevent is from blackening. The halogen iodine provides the cyclic process in which the light bulb can provide good efficiency at higher temperature with prolonged life. Due to this halogen in light bulb the bulb is not blackening with time and use. Halogen bulbs are available in two basic types which are most commonly used in automotive. One type of light bulbs have single filament in them. They can only be used as low or high beam at a time. These bulbs have type number like H1,H3, H7, H9, H11, HB4 and HB3. There light bulbs had smaller glass tube and they are consuming less power....

Internet problem today This is not just you who's internet is slow and is not browsing YouTube and other services like facebook etc. This is a common problem for many countries as a submarine cable had been disconnected and we are facing slow internet connection. Hope this problem will be cured and the disconnected cable will be restored back soon. There is no need to give complaint to the local service provider for speed issue as they can't solve it. Also stay with your other relation and enjoy the time with them which you people are normally wasting on system! Take this disconnection in positive manner and even enjoy this time with your other activities as long as it restores. Unfortunately to day is the time when we can't survive without internet. This thing is compulsory in our day to day life. Stay creative and do some other work which you can do offline at PC or anything out of PC world. At the moment it can only browse google or blogger or similar but not YouTube or...

Here is the YouTube video regarding this article: Here is the YouTube video Hindi version: What are photoresistors? Photo resistors, also known as light dependent resistors (LDR), are light sensitive devices most often used to indicate the presence or absence of light, or to measure the light intensity. In the dark, their resistance is very high, sometimes up to 1MΩ, but when the LDR sensor is exposed to light, the resistance drops dramatically, even down to a few  ohms , depending on the light intensity. LDRs have a sensitivity that varies with the wavelength of the light applied and are nonlinear devices. They are used in many applications but are sometimes made obsolete by other devices such as photodiodes and phototransistors. Some countries have banned LDRs made of lead or cadmium over environmental safety concerns. Light dependent resistor definition Photo resistors are light sensitive resistors whose resistance decreases as the intensity of light they ...

CCFL energy saver lamp repair tutorial How to open and disassemble a ccfl energy lamp Here is my YouTube video supporting this document: Here is my YouTube video supporting this document Hindi/ Urdu version : Use of ccfl or cfl light bulbs CCFL or CFL light bulbs are very commonly used everywhere. In the last three decades they were very popular and still are considered excellent as electrical lighting source. They are reliable and energy saving light sources. Their light quality is excellent as they have light close to daylight. Having all good features, they have problems also. First they have definite tube light. Second they have electronic ballast circuit with is going sometimes defective. The good news is they are totally repairable now a days. Their parts like glass tube or glass element and other electronic parts are easily available. All they need are replacement parts which restores the lamp to new life. The parts price is also very low. Their repair is a co...

Transformer testing after shipment introduction to transformer testing When a transformer installation is completed, it is required to do some tests on transformer to determine the transformer electrical, mechanical and thermal stability for the utility and facility are are supposed to used. Such tests for a transformer are defined as standard test in national standards created by IEEE, NEMA and ANSI. A few tests which are normally performed on a transformer after supplied are as following. Transformer Turns Ratio TTR testing The Transformer Turns Ratio test is used to make sure that the Turns Ratio between the winding of the transformer is correct. With this information, one can decide what the output voltage of the transformer will be. The ratio is calculated and tested under no-load conditions. Simultaneous readings of voltage are taken to low voltage and high voltage windings area taken after the voltage is applied to one winding. The ratio is the...

Toyota 20R engine head illustrated view Here is the illustrated view for famous Toyota 20R engine head. The illustrated view of 20R Toyota engine.

Here is the YouTube video showing all these details in motion: Here is the YouTube video showing all these details in Hindi and Urdu: A mouse when use with a PC or Laptop for years, it develop different problems. A very common defect is a double click problem. The double click defect is one in which you are encountering to multiple clicks of mouse buttons when you click once. This is due to switches defect. Switches are working hard all the time during their service life. They are exposed to dust also. Switches have springs and contacts. With use the springs loose their elasticity and the contacts accumulates dust and debris. Then one experiences double or multiple clicks due to those defective switches. This becomes sometimes horrible when you need precise one click job. Especially if you are working on some drawing software or video editing software. The solution to such defect is to replace the bad switches with good and new switches or to swap switches ...