Showing posts with label and. Show all posts
Showing posts with label and. Show all posts
Wednesday, September 11, 2013
Wireless Sensor Applications using Dorji’f DRF5150S and DRf4432S Modules
Dorji Applied Technology from China builds different types of RF modules that can be easily incorporated in designing wireless data loggers, sensor network, telemetry and other wireless applications.
Some of their RF modules have an additional pre-programmed microcontroller that allows direct interface of selected analog and digital sensors to the module. This means you don’t need any external MCU or to write codes for these sensors. In this tutorial, Raj from Embedded Lab talks about their DRF5150S and DRF4432S RF modules which are very versatile and easy to use for wireless sensor applications. For illustrative purpose, Raj shows how to put them together to construct a simple wireless sensor application where data from a remote sensor are received and displayed on a PC, without using any external microcontrollers.
Monday, September 2, 2013
IR illuminator for Night Vision Tv Cameras and Scopes
This source uses LEDs and an astable oscillator to control the switch, duty-cycle, and effective IR illumination output.
Circuit Diagram
Circuit Diagram
Saturday, April 13, 2013
FINDING THE BASE and determining NPN or PNP
FINDING THE BASE and determining NPN or PNP
Get an unknown transistor and test it with a multimeter set to "x10"
Try the 6 combinations and when you have the black probe on a pin and the red probe touches the other pins and the meter swings nearly full scale, you have an NPN transistor. The black probe is BASE
If the red probe touches a pin and the black probe produces a swing on the other two pins, you have a PNP transistor. The red probe is BASE
If the needle swings FULL SCALE or if it swings for more than 2 readings, the transistor is FAULTY.
Get an unknown transistor and test it with a multimeter set to "x10"
Try the 6 combinations and when you have the black probe on a pin and the red probe touches the other pins and the meter swings nearly full scale, you have an NPN transistor. The black probe is BASE
If the red probe touches a pin and the black probe produces a swing on the other two pins, you have a PNP transistor. The red probe is BASE
If the needle swings FULL SCALE or if it swings for more than 2 readings, the transistor is FAULTY.
Friday, April 12, 2013
Portable Satellite Radio and MP3 Player XM XPMP3H1
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The XMp3i Portable Satellite means of communication combines satellite radio and MP3 capabilities into a single compact package. This efficient device shows comedian celebrity, song title, and channel in rank on a hefty color exhibit. The device lets you browse and explore other songs and artists lacking leaving your current channel. join up the XMp3i with an XM subscription design to facilitate preeminent suits you and start enjoying all your favorite harmony, gossip, and entertainment on the contact of a button.
Individual SiriusXM brings you added of pardon? you be keen on, all happening lone place. take pleasure in industrial-limitless harmony from practically each genre - together with musician-devoted channels. induce live sports act-by-play and 24/7 expert natter. have the benefit of exclusive entertainment and comedy. Plus the human race-lecture news, community traffic and weather, and added. elect amid the first-class, primary before All Access training package.
Thursday, April 11, 2013
Burglar Alarm Using LDR and BC 548
Description
Circuit showing a Burglar Alarm.Here we have used a ldr and a switching transistor for making this circuit
.When the light coming towards the ldr during the period the ldr have low resistance so the buzzer will on.When the light going away the ldr during the period the ldr have high resistance so the transistor will off.Here you need a 12 volt power supply
Components Required
Resistor
10 k(preset)
Transistor
BC 548
LDR
Buzzer
Source by : http://www.electronics-circuits.in/2012/03/burglar-alarm-ldr-bc-548.html
Tuesday, April 9, 2013
AUDIO SCHEMATIC AND ROUTING ELECTRONIC DIAGRAM
AUDIO SCHEMATIC AND ROUTING ELECTRONIC DIAGRAM
It shows the connection and wiring between each parts and component of audio system of the vehicle such as the alternator, ignition switch, antenna meter, tail, audio, front speaker, rear speaker, tweeter speaker, and many more.
Monday, April 8, 2013
Pieces Parts Components and Sound
If you are in the market for a surround sound system Im sure you are trying to learn as much as possible about options before you reach the buying stage. One thing to keep in mind is that there are many options and most of them will come down to a matter of taste when all is said and done. There is no right or wrong component or process when it comes to buying a surround sound system only what does and doesnt work for you and the space you have available.
You will find throughout the process that there are many parts, pieces, and components that you may purchase for your surround sound system and even more prices for those individual items. Ultimately the decision comes down to how much of a sound snob you are. Seriously. I must admit that my personal preference is for the most possible sound saturation and the most realistic possible sound as possible. For this reason I am more interested in buying the components as individuals rather than a simple AV receiver. This does not mean that an AV receiver wouldnt be perfectly adequate (especially in relation to the size of my rather small media room) but that I prefer the added control over the sound that individual components provides.
Unfortunately, I cannot tell you which will work best for your situation as your tastes and requirements will also play heavily on which decision is best for you as will your budget. Some people do not place nearly as much emphasis on sound as I do and most people have budget constraints that make individual components seem like a bit of overkill. However, if you spend, as much time as I do submersing yourself in experiences that require sound, then you will find that the investment in these components may be well worth every penny. You will pay a few though and should understand that now.
If you want to build a fabulous surround sound system you will need to start with the preamp or processor. This will be the heart of your sound system and works as a surround processor, AM/FM radio, amplifier, and preamp in one. This piece of equipment receives the signals and then sends them on their merry way. Amazingly enough the information always seems to find its way where it should go-assuming of course that everything is plugged into its proper channel.
The tuner allows you to receive and process AM/FM radio signals, XM or Satellite Radio, and some High Definition signals as well. The amplifier adds power to the sound or as its name implies, amplifies it. This allows the sound to reach across the room so that everyone in the room is touched by it.
These components each achieve functions individually that a good quality AV receiver can accomplish. The difference is always in degrees and depth. The AV receiver allows some of the functionality of each but doesnt quite match the control and nuances that can be achieved with any one of the pieces individually. The average consumer doesnt need that sizeable of an investment in equipment, money, time, or space in order to achieve excellent theater quality sound in their home theater system and that is the important thing to remember.
If you are hoping to imitate a theater experience in an average size room, chances are you will never need anything more than a decent AV receiver and an excellent set of speakers. The more speakers you have in your surround sound system, the better the quality of the sound will be. However, better quality speakers will trump marginal quality equipment any day while marginal quality speakers can still ruin the sound of even the best quality AV equipment. The best advice I can give you when purchasing equipment for your surround sound system is to make sure you put your money in your speakers and sort the rest out afterwards.
PPPPP
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How to Make a Small Homemade Automatic Voltage Stabilizer for TV sets and Refrigerator
A voltage stabilizer is a device which is used to sense inappropriate voltage levels and correct them to produce a reasonably stable output at the output where the load is connected.
Referring to the figure we find that the whole circuit is configured with the single op amp IC 741. It becomes the control section of the whole design.
Here we will study the design of a simple automatic mains AC voltage stabilizer which can be applied for the above purpose.
How the Circuit Functions
Referring to the figure we find that the whole circuit is configured with the single op amp IC 741. It becomes the control section of the whole design.
The IC is wired as a comparator, we all know how well this mode suits the IC 741 and other op amps. Its two inputs are suitable rigged for the said operations.
Friday, April 5, 2013
170W power amplifier LM4651 and LM4652
170 Watt power amplifier is a power amplifier that is built by IC LM4651 and LM4652.
Part of this power amplifier driver using the LM4651 IC designed specifically for the purpose of the class AB amplifier driver with short circuit protection feature, containing under voltage, thermal shutdown protection and standby functions. Section 170 Watt power amplifier using LM4651 IC with a MOSFET power amplifier is equipped with temperature sensors that will be used by IC LM4651 as controlnya thermal signal. IC IC LM4651 and LM4652 are designed specifically to each other in pairs to create a class AB power amplifier with protection features are detailed. Detailed series of 170 Watt power amplifier can be seen in thethe following figure .
Power amplifier circuit requires supply voltages +22 V DC symmetrical 0-22V. Power Amplifier with IC LM4651 and LM4652 are often used in portable HiFi systems such as powered speakers, power subwoofer and car audio power Booter. D1, D2, D3 and D4 in series 170 watt power amplifier with LM4651 and LM4652 is a 22V zener diode.
ReadMore....
Part of this power amplifier driver using the LM4651 IC designed specifically for the purpose of the class AB amplifier driver with short circuit protection feature, containing under voltage, thermal shutdown protection and standby functions. Section 170 Watt power amplifier using LM4651 IC with a MOSFET power amplifier is equipped with temperature sensors that will be used by IC LM4651 as controlnya thermal signal. IC IC LM4651 and LM4652 are designed specifically to each other in pairs to create a class AB power amplifier with protection features are detailed. Detailed series of 170 Watt power amplifier can be seen in thethe following figure .
Power amplifier circuit requires supply voltages +22 V DC symmetrical 0-22V. Power Amplifier with IC LM4651 and LM4652 are often used in portable HiFi systems such as powered speakers, power subwoofer and car audio power Booter. D1, D2, D3 and D4 in series 170 watt power amplifier with LM4651 and LM4652 is a 22V zener diode.
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