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Tuesday, November 18, 2014

Stereo Circuit Schematic of The ADAU1592 Audio Power Amplifier

Stereo Circuit Schematic of The ADAU1592 Audio Power Amplifier

This is a stereo circuit schematic of the ADAU1592, a 2-channel, bridge-tied amount (BTL) switching audio ability amplifier. You can administer ADAU1592 on collapsed console televisions, pc audio arrangement and/or mini-components applications.

According to the ADAU1592 datasheet, an alien aegis ambit is recommended to be added for applications that crave accumulation voltage (PVDD) >15 V, you can use RC snubber or Schottky diode for this purpose. To anticipate the exhausted frequencies of asynchronous clocks (if appliance assorted ADAU1592s) in the audio band, it is recommended to use alone one alarm antecedent if the ADAU1592s allotment the aforementioned ability supply.

You can additionally body a archetypal address appliance ambit of the ADAU1592 by affairs pin 11 (MO/ST) to argumentation high, with abundant account in the datasheet.

Make a series letters from the LED

Make a series letters from the LED , Things to consider before making the sign of the LED array,
1) Use LED nodes.
2) Paint the top of the PCB with a dark color (black).
3) Note the LED specifications. In this experiment use a 5mm diameter LED nodes
that emit red, specification voltage of 3 volts.

The assembly of LED:
1) One letter composed at most 5 columns and 7 rows.
2) One column mostly composed by 6 LEDs are arranged series.
3) Then the fifth column are connected in parallel.

4) Each column given the constraints, Rx, which amount depends on the number of LEDs in one column and depends also on the type of LED (in this experiment that used LED 5mm in diameter, clear with red light beam).

5) In a column consisting of 6 LEDs, Rx = 330 ohm, 5 LEDs, Rx = 560 Ohms, 4 LEDs, Rx = 680 Ohms

Remember, this provision applies to 5 mm LED red light beam nodes.

6) Every letter was given FCS9013 transistor amplifier.

Here is one letter LED scheme.

Medium picture below is the lay out of the 2-letter nameplate. To make the sign 8 letter, copied from a second stay this letter.

Example of LED on the letters A and B:

Value Rx in the first and the fifth column (letter A) of 560 ohms, because it consists of 5 LEDs are arranged series. Rx in the second column, third, and fourth, amounting to 680 ohms because it consists of two LEDs.

Rx first column letter B, 330 ohms. Rx second column, third, fourth, and fifth at 680 ohms.

Monday, November 17, 2014

Protection of the Mosfet in flyback power supply

PKC-136 PEAK CLAMP CHARACTERISTICS VBR 160Vdc VDRM 700Vdc P 1.5W. See Circuits Diagram below :

Protection of the Mosfet in flyback power supply

Feature :
- Protection of the Mosfet in flyback power supply
- TRANSIL™ and blocking diode in a single package BENEFITS
- Accurate voltage clamping regardless load
- Reduced current loop
- Reduced EMI emission
- High integration
- Fast assembly
- Reduced losses in stand by mode

Tuesday, November 11, 2014

The Gentle Touch Circuit Diagram

Consumer appliances these days hardly ever have a proper mains switch. Instead, appliances are turned on and off at the touch of a button on the remote control, just like any other function. This circuit shows how a device (as long as it does not draw too high a current) can be switched on and off using a pushbutton. The approach requires that a microcontroller is already available in the circuit, and a spare input port pin and a spare output port pin are required, along with a little software. When power is applied T1 initially remains turned off. When the button is pressed the gate of T1 is taken to ground and the p-channel power MOSFET conducts. The microcontroller circuit is now supplied with power. Within a short period the microcontroller must take output PB1 high. This turns on n-channel MOSFET T1 which in turn keeps T1 turned on after the push-button is released.

Now the microcontroller must poll the state of the push-button on its input port (PB0) at regular intervals. Immediately after switch-on it will detect that the button is pressed (a low level on the input port pin), and it must wait for the button to be released. When the button is next pressed the device must switch itself of f: to do this the firmware running in the microcontroller must set the output port pin to a low level. When the button is subsequently released T1 will now turn off and the supply voltage will be removed from the circuit.

The circuit itself draws no current in the off state, and for (rechargeable) battery-powered appliances it is therefore best to put the switch before the voltage regulator. For mains-powered devices the switch can also be fitted before the voltage regulator (after the rectifier and smoothing capacitor). Since there is no mains switch there will still be a small standby current draw in this case due to the transformer. Be careful not to exceed the maximum gate-source voltage specification for T1: the IRFD9024 device suggested can withstand up to 20 V. At lower voltages R2 can be replaced by a wire link; otherwise suitable values for the voltage divider formed by R1 and R2 must be selected.

Circuit diagram:

The Gentle Touch Circuit Diagram

The author has set up a small website for this project at http://reweb.fh-weingarten.de/elektor, which gives source code examples (which include dealing with pushbutton contact bounce) for AVR microcontrollers suitable for use with AVR Studio and GNU C. Downloads are also available at http://www.elektor.com.

Saturday, November 1, 2014

General DC Power Supply with uA723 This is the power supply circuit for general purpose usage General Power Supply with uA723 circuit diagram The s

General DC Power Supply with uA723

This is the power supply circuit for general purpose usage.

The supply can be used for supply output voltages from 1 to 35V. The line transformer should be selected to give about 1.4 times the desired output voltage from the positif side of filted capacitor C1 to ground. Potensiometer R2 sets the output voltage to the desired value by adjusting the reference input. Rsc is the current limit set resistor.

For example, if the maximum current output is to be 1A, Rsc=0.65/1.0 = 0.65 Ohm. The 1KOhm resistor,R5, is a light-loaded resistor designed to improve the no-load stability of the supply.

Thursday, October 23, 2014

The Portable Solar Lantern

This portable solar lantern circuit uses 6 volt/5 watt solar panels are now widely available. With the help of such a photo-voltaic panel we can construct an economical, simple but efficient and truly portable solar lantern unit. Next important component required is a high power (1watt) white LED module.

When solar panel is well exposed to sunlight, about 9 volt dc available from the panel can be used to recharge a 4.8 volt /600 mAh rated Ni-Cd batterypack. Here red LED (D2) functions as a charging process indicator with the help of resistor R1. Resistor R2 regulates the charging current flow to near 150mA.

Solar Lantern Circuit Schematic

Assuming a 4-5 hour sunlit day, the solar panel (150mA current set by the charge controller resistor R2) will pump about 600 – 750 mAh into the battery pack. When power switch S1 is turned on, dc supply from the Ni-Cd battery pack is extended to the white LED (D3). Resistor R3 determines the LED current. Capacitor C1 works as a buffer.

Note: After construction, slightly change the values of R1,R2 and R3 up/down by trial&error method, if necessary.

Wednesday, October 8, 2014

Door Alarm Hangs up on the door handle Beeps when someone touches the door handle from outside

Door Alarm

Hangs up on the door-handle

Parts:

R1______________1M   1/4W Resistor R2______________3K3 1 or 2W Resistor (See Notes) R3_____________10K   1/2W Trimmer Cermet (See Notes) R4_____________33K   1/4W Resistor R5____________150K   1/4W Resistor R6______________2K2 1/4W Resistor R7_____________22K   1/4W Resistor R8______________4K7 1/4W Resistor C1,C2__________10nF   63V Ceramic or Polyester Capacitors C3_____________10pF   63V Ceramic Capacitor C4,C6_________100nF   63V Ceramic or Polyester Capacitors C5______________2µ2   25V Electrolytic Capacitor C7____________100µF   25V Electrolytic Capacitor D1,D2,D4_____1N4148   75V 150mA Diodes D3_____________5 or 3mm. Red LED Q1,Q2,Q3,Q5___BC547   45V 100mA NPN Transistors Q4____________BC557   45V 100mA PNP Transistor L1_________________   (See Notes) L2_____________10mH miniature Inductor Hook_______________   (See Notes) BZ1___________Piezo sounder (incorporating 3KHz oscillator) SW1,SW2________SPST miniature Slider Switches B1_______________9V PP3 Battery Clip for PP3 Battery

Device purpose:

This circuit emits a beep and/or illuminates a LED when someone touches the door-handle from outside. The alarm will sound until the circuit will be switched-off.
The entire circuit is enclosed in a small plastic or wooden box and should be hanged-up to the door-handle by means of a thick wire hook protruding from the top of the case.
A wide-range sensitivity control allows the use of the Door Alarm over a wide variety of door types, handles and locks. The device had proven reliable even when part of the lock comes in contact with the wall (bricks, stones, reinforced concrete), but doesnt work with all-metal doors.
The LED is very helpful at setup.

Circuit operation:

Q1 forms a free-running oscillator: its output bursts drive Q2 into saturation, so Q3 and the LED are off. When part of a human body comes in contact with a metal handle electrically connected to the wire hook, the body capacitance damps Q1 oscillations, Q2 biasing falls off and the transistor becomes non conducting. Therefore, current can flow into Q3 base and D3 illuminates. If SW1 is closed, a self-latching circuit formed by Q4 & Q5 is triggered and the beeper BZ1 is activated.
When the human body part leaves the handle, the LED switches-off but the beeper continues to sound, due to the self-latching behavior of Q4 & Q5. To stop the beeper action, the entire circuit must be switched-off opening SW2.
R3 is the sensitivity control, allowing to cope with a wide variety of door types, handles and locks.

Notes:

    L1 is formed winding 20 to 30 turns of 0.4mm. diameter enameled copper wire on R2 body and soldering the coil ends to the resistor leads. You should fill R2 body completely with coil winding: the final turns number can vary slightly, depending on different 1 or 2W resistor types actual length (mean dimensions for these components are 13-18mm. length and 5-6mm. diameter).

    The hook is made from non-insulated wire 1 - 2mm. diameter (brass is well suited). Its length can vary from about 5 to 10cm. (not critical).

    If the device is moved frequently to different doors, Trimmer R3 can be substituted by a common linear potentiometer fitted with outer knob for easy setup.

    To setup the device hang-up the hook to the door-handle (with the door closed), open SW1 and switch-on the circuit. Adjust R3 until the LED illuminates, then turn slowly backwards the screwdriver (or the knob) until the LED is completely off. At this point, touching the door-handle with your hand the LED should illuminate, going off when the hand is withdrawn. Finally, close SW1 and the beeper will sound when the door-handle will be touched again, but wont stop until SW2 is opened.

    In regular use, it is advisable to hang-up and power-on the device with SW1 open: when all is well settled, SW1 can be closed. This precautionary measure is necessary to avoid unwanted triggering of the beeper.

Sunday, October 5, 2014

How to calculate the value of a resistor using the color coded stripes on the resisto

To calculate the value of a resistor using the color coded stripes on the resistor, use the following procedure.

Step One: Turn the resistor so that the gold or silver stripe is at the right end of the resistor.

Step Two: Look at the color of the first two stripes on the left end. These correspond to the first two digits of the resistor value. Use the table given below to determine the first two digits.

Step Three: Look at the third stripe from the left. This corresponds to a multiplication value. Find the value using the table below.

Step Four: Multiply the two digit number from step two by the number from step three. This is the value of the resistor n ohms. The fourth stripe indicates the accuracy of the resistor. A gold stripe means the value of the resistor may vary by 5% from the value given by the stripes.

Resistor Color Codes (with gold or silver strip on right end)

Follow the above procedure with the examples below and soon you will be able to quickly determine the value of a resistor by just a glance at the color coded stripes.

Examples

Example1:
You are given a resistor whose stripes are colored from left to right as brown, black, orange, gold. Find the resistance value.

Step One: The gold stripe is on the right so go to Step Two.

Step Two: The first stripe is brown which has a value of 1. The second stripe is black which has a value of 0. Therefore the first two digits of the resistance value are 10.

Step Three: The third stripe is orange which means x 1,000.

Step Four: The value of the resistance is found as 10 x 1000 = 10,000 ohms (10 kilohms = 10 kohms).

The gold stripe means the actual value of the resistor mar vary by 5% meaning the actual value will be somewhere between 9,500 ohms and 10,500 ohms. (Since 5% of 10,000 = 0.05 x 10,000 = 500)

Example2:
You are given a resistor whose stripes are colored from left to right as orange, orange, brown, silver. Find the resistance value.

Step One: The silver stripe is on the right so go to Step Two.

Step Two: The first stripe is orange which has a value of 3. The second stripe is orange which has a value of 3. Therefore the first two digits of the resistance value are 33.

Step Three: The third stripe is brown which means x 10.

Step Four: The value of the resistance is found as 33 x 10 = 330 ohms.

The silver stripe means the actual value of the resistor mar vary by 10% meaning the actual value will be between 297 ohms and 363 ohms. (Since 10% of 330 = 0.10 x 330 = 33)

Example3:
You are given a resistor whose stripes are colored from left to right as blue, gray, red, gold. Find the resistance value.

Step One: The gold stripe is on the right so go to Step Two.

Step Two: The first stripe is blue which has a value of 6. The second stripe is gray which has a value of 8. Therefore the first two digits of the resistance value are 68.

Step Three: The third stripe is red which means x 100.

Step Four: The value of the resistance is found as 68 x 100 = 6800 ohms (6.8 kilohms = 6.8 kohms).

The gold stripe means the actual value of the resistor mar vary by 5% meaning the actual value will be somewhere between 6,460 ohms and 7,140 ohms. (Since 5% of 6,800 = 0.05 x 6,800 = 340)

Example 4:
You are given a resistor whose stripes are colored from left to right as green, brown, black, gold. Find the resistance value.

Step One: The gold stripe is on the right so go to Step Two.

Step Two: The first stripe is green which has a value of 5. The second stripe is brown which has a value of 1. Therefore the first two digits of the resistance value are 51.

Step Three: The third stripe is black which means x 1.

Step Four: The value of the resistance is found as 51 x 1 = 51 ohms.

The gold stripe means the actual value of the resistor mar vary by 5% meaning the actual value will be somewhere between 48.45 ohms and 53.55 ohms. (Since 5% of 51 = 0.05 x 51 = 2.55)

Other Resistor Information

There are some more rules that may be useful when working with resistors. You do not need to know them but if you need a resistor with a value that you do not have, you my be able to use the following information to create the value of resistor you need.

First Rule for Resistors : Series Connection

When two resistors are connected in series, as shown in Figure 1, the new resistance between points A and B is R1 + R2.

Figure 1

The resistors add together. For example if R1 = 500 ohms and R2 = 250 ohms then the resistance between points A and B would be R1 + R2 = 500 + 250 = 750 ohms.

Second Rule for Resistors : Parallel Connection

When two resistors are connected in parallel, as shown in Figure 2, the new resistance is smaller than either R1 or R2. The new resistance between points A and B is (R1 x R2) / (R1 + R2).

Figure 2

For example, if R1 = 500 and R2 = 250 then the resistance between points A and B = (500 x 250) / (500 + 250) = (125,000) / (750) = 167 ohms. If R1 = R2 then the new resistance is just R1 / 2.

Wednesday, September 24, 2014

DC Voltage Doubler using the 74HC132 Circuit Diagram

This circuit is a cheap way is a simple DC voltage doubler, which requires a few components and will generate a voltage 10Vdc from a 5Vdc power supply that can be output from the PC USB. The oscillator should be constructed from a non-functional door IC 74HC132 then requires more than two components are R1 and C3. The most important parameters of the voltage doubler circuit are given in the table schema.

Note

That due to the tolerances of the data IC may have a few differences.

DC Voltage Doubler using the 74HC132 Circuit Diagram

Sunday, September 21, 2014

Fuse Box Toyota 2006 Matrix Under The Dash Diagram

Fuse Box Toyota 2006 Matrix Under The Dash Diagram - Here are new post for Fuse Box Toyota 2006 Matrix Under The Dash Diagram.

Fuse Box Toyota 2006 Matrix Under The Dash Diagram

Fuse Panel Layout Diagram Parts: instrument panel, glass breakage sensor ECU, airbag sensor assembly, voltage inverter, ABS deceleration sensor, daytime running ligjt relay, starter cut relay, engine control mocule, shift lock control, stereo component amplifier, automatic light control sensor, cruise control, ignition relay, transponder key computer.

Wednesday, August 20, 2014

Auto Sound Systems for the Budget Minded

Despite popular belief, it is quite possible to get a great quality auto sound system even if you are operating on a limited budget. I completely understand your skeptical glances and the comments and grumbles that being on a budget means different things to different people. I can tell you without a doubt that you can get a really nice sound system for your car, truck, or SUV even if your budget is less then $300.

There are several things you can do as a savvy consumer that will help drive the price of the wonderful sound you seek to a bare minimum if you use a few tips, tricks, and techniques, in order to do so. First of all, the competition in this market is fairly fierce. As a result of that you will find that prices tend to be pretty competitive from one shop to another and that your best bargains are usually going to be found online. Search around online and find the absolute best bargain you can find on the auto sound system of your dreams.

Once youve found the lowest online price, get on the phone with local retailers. Many local stores understand the need to compete on a much larger scale. As a result they are often willing to match prices and even through in perks such as installation or freebie upgrades in order to sweeten the deal. Once youve gotten a few upgrades from local markets, continue calling around and let them compete with one another for your business. Take into account the value of the freebies and upgrades to you. If you really have no use for the bobble head hula girl then skip that offer and go for the one that offers an upgrade on speakers or an extended warranty thrown in for free. Make sure that the upgrades are really worth something to you. Also consider the value of the upgrade verses the price and go with the best bargain.

Another truth when it comes to purchasing an auto sound system is that you do not have to buy the best known or biggest name brand in order to get a great sound and excellent quality. Spend your money where it matters most to you. Sometimes you are paying for nothing more than the name attached to a product. Im a huge fan of Bose. I love the sound and have yet to find a product that can offer the quality of sound at a lower price. That does not mean I would not jump at the chance to buy an untried brand if the sound in the display equaled the quality of sound I can get with a Bose sound system. In fact, I have held onto an SUV for 10 years because Im not ready to give up my sound system and my truck still runs. A Bose system is not a budget investment, but you can find bargains that are similar and sound wonderful. In other words, dont become a name brand snob if you dont have to.

In reality, there are many discount dealers you can find both online and off that will be more than happy to hook you up with a great set of sound for your car, truck, or SUV at a really great price. It simply takes a little leg and phone work on occasion to find them.

Saturday, August 16, 2014

The New Technology of Auto Sound Systems

So what kind of auto sound system really seems to float your boat? Are you the type of person who wants the simplest sound system on the market today? Will you be content with talk radio and a few FM radio stations? Do you need an 8-track? How about a cassette player? I hate to say it, but if you are still living in the past, you will have a rather difficult time finding an audio system for your car that can accommodate your desire to hold technology behind the current trends. These things simply do not sell. You may find an occasional auto sound system that still has a cassette player but for the most part you will find that the market for this device is almost as limited as the quality of the device itself.

Todays auto sound systems are more sophisticated than they have ever been before. Gone are the days when you had to turn a dial to find a radio station. Today you can set your car to scan the stations until you find one you like. You can even set them to scan radio stations by type. For me, that was a great invention as I find country music rather sad and always end up finding the one song that will bring uninvited torrents of tears while flipping through the stations mindlessly as I drive. Being someone that hates to cry on any given day it is bad enough to cry. Add to that the fact that Im probably driving at about 75 or so miles an hour and you can probably see where this is problematic. I do best whenever I can avoid country music stations all together.

Another great technological advance when it comes to the auto sound system is individual volume control. No longer do you have to listen to your mothers, brothers, sisters, or Aunt Sallys music blaring, you can slide on your headphones and mute out the noise of the rest of the world. If your vehicle has a truly sophisticated sound system, you can even change the radio station in order to find music that is much more suitable for your musical tastes.

You should also be aware that todays auto sound systems are much more user friendly than those of days past. Most displays are digital and easy to read. You might even notice that many can read the local radio stations codes and formats and will list the songs that are playing for you. Youll never have to wonder about the name of that great song you just heard or even who sang it again. Its right before your eyes as you are driving along and listening to awesome tunes.

The best auto sound systems offer not only CD options to drivers and passengers alike but also the ability and capability of reading and interpreting MP3 data as well. More and more people are turning to MP3s for their primary source of music. It takes up far less space than your average CD holder and holds a lot more music. You can download only the songs you like without purchasing an entire CD full of songs only to find that you only liked one song on the entire CD. You can put your favorite songs on a memory stick and bring them along for the ride. Its a great way to enjoy music in this day and age. Im quite literally surprised that I havent seen an iPod auto sound system pop up on the radar yet and am seriously expecting to see one any day now, literally.

Regardless of whether or not you wish to enter the modern era of music and music listening its upon us. However, if you are truly opposed we could always find you a nice supply of Sinatra in MP3 format in order to make the transition a little more comfortable for you.