Showing posts with label a. Show all posts
Showing posts with label a. Show all posts
Wednesday, December 25, 2013
It also has a special mode for pictures
It also has a special mode for pictures of contacts and a World Card Mobile application
for capturing and reading business cards.
Videos can be captured in normal and MMS modes. Format options include MPEG4 and H.263. Highest resolution can be set at VGA (640x480 pixels). Recording limit has a number of options such as 10
seconds, 3 minutes, 2 MB, etc.This is a gadget which can add extra capability to your cellular phone. A cell phone booster with
a Bluetooth contrivance can set up a wireless connection with some other detailed devices with the same capability. Hence, it abolishes the requirement to use physical cables.This accessory help
you in providing the strong network along with the huge connectivity. Antenna Booster will help you in many ways. It provides the good connection so that you can easily talk to your relatives or
family members.Faceplates are generally used to give the trendy, classy, amazing, stylish, and the glossy look to your touchtone phones. They are available in the market in great abundance. You can
get them according to your need and make your cell also luxurious.
This is all about the accessories and its benefits, I hope after reading this article you will surely purchase the good and the stylish accessories for your handsets.
Schools are looking to purchase mobile phone signal boosters. The misuse of cell phone boosters during class is causing the teachers to fight back. Not only is it a huge distraction during class
while teachers are trying to actually teach, but there is also concern that cheating is more prevalent with the ongoing texting.
In Des Moines, Iowa, one school board member was quoted by the Des Moines Record. "I dont think they have a place in the educational environment. The educational environment is supposed to be
about students learning and teachers teaching and teachers cant teach over a mobile phone. If a student is busy on the cell phone booster they arent learning. Its a distraction... and we need to
minimize the distraction."
What is the solution? With the FCC controlling signal boosters as well as signal boosters, and the law limiting signal boosters to use only by federal authorities, schools dont have much of a
chance to fight back that way.
One reader responded to the article in the Des Moines Register with an amusing suggestion to the problem. "Oh, For Crying-out-load. Just hang one of those shoe organizers next to the door and
require each student to check in their phones on entering the classroom, then they can retrieve them after class.
Read More..
for capturing and reading business cards.
Videos can be captured in normal and MMS modes. Format options include MPEG4 and H.263. Highest resolution can be set at VGA (640x480 pixels). Recording limit has a number of options such as 10
seconds, 3 minutes, 2 MB, etc.This is a gadget which can add extra capability to your cellular phone. A cell phone booster with
a Bluetooth contrivance can set up a wireless connection with some other detailed devices with the same capability. Hence, it abolishes the requirement to use physical cables.This accessory help
you in providing the strong network along with the huge connectivity. Antenna Booster will help you in many ways. It provides the good connection so that you can easily talk to your relatives or
family members.Faceplates are generally used to give the trendy, classy, amazing, stylish, and the glossy look to your touchtone phones. They are available in the market in great abundance. You can
get them according to your need and make your cell also luxurious.
This is all about the accessories and its benefits, I hope after reading this article you will surely purchase the good and the stylish accessories for your handsets.
Schools are looking to purchase mobile phone signal boosters. The misuse of cell phone boosters during class is causing the teachers to fight back. Not only is it a huge distraction during class
while teachers are trying to actually teach, but there is also concern that cheating is more prevalent with the ongoing texting.
In Des Moines, Iowa, one school board member was quoted by the Des Moines Record. "I dont think they have a place in the educational environment. The educational environment is supposed to be
about students learning and teachers teaching and teachers cant teach over a mobile phone. If a student is busy on the cell phone booster they arent learning. Its a distraction... and we need to
minimize the distraction."
What is the solution? With the FCC controlling signal boosters as well as signal boosters, and the law limiting signal boosters to use only by federal authorities, schools dont have much of a
chance to fight back that way.
One reader responded to the article in the Des Moines Register with an amusing suggestion to the problem. "Oh, For Crying-out-load. Just hang one of those shoe organizers next to the door and
require each student to check in their phones on entering the classroom, then they can retrieve them after class.
Saturday, December 21, 2013
This is why it is a good idea to get a universal gift
This is why it is a good idea to get a universal gift that all people will love. Here are some reasons why a booster is the perfect
present.
Shopping for a teen or a pre-teen can be an exceedingly difficult task. A person has to be updated on the latest gadgets and the hottest fashions. Instead of catering a gift to preconceived notions
of what teenagers might like, a person should buy a present based on what these teens will need. All young people use cell phones and the onset of smart phones has increased their prevalence. A
cell phone booster is a great gift because a teen is guaranteed to use it. Anything that allows them to talk and text for longer periods of time will keep them happy and satisfied for years to
come.
If a person has a businessman on his or her gift list, a cell phone booster is a terrific option. People who work in business rely on their phones in order to communicate with clients. There is
nothing more embarrassing than consistently dropping or missing calls. A cell phone booster will reduce the propensity for dropped telephone conversations. Any businessman will be thankful for a
device that allows them to conduct business in an easy and effective manner.
Shopping for ones parents can also be a perplexing experience. People often rely on flowers for their mothers and ties for their dads. A person should instead use some ingenuity and purchase a
cell phone booster for their parents. Although this technology has been around for a number of years, it will seem revolutionary to most parents. Many of them will marvel at the fact that they can
talk in any part of the house. This is a great present for parents that love to talk and communicate over the phone.
So for the upcoming holiday season, look for something that every person will love. Since most people have mobile phones, a cell phone booster is the ideal gift. They are terrific for any age group
and any demographic. So pick up a booster and reward the ones you love.If you have trouble talking on your cell due to a weak signal on the road, at home, or in the office, then a cell phone signal
booster can improve your reception and call quality. Do you need a booster for your weak signal? Many people report poor cell signals when traveling to different areas. Cellular boosters help you
by improving call quality and reducing dropped calls while being very easy to install.
Read More..
present.
Shopping for a teen or a pre-teen can be an exceedingly difficult task. A person has to be updated on the latest gadgets and the hottest fashions. Instead of catering a gift to preconceived notions
of what teenagers might like, a person should buy a present based on what these teens will need. All young people use cell phones and the onset of smart phones has increased their prevalence. A
cell phone booster is a great gift because a teen is guaranteed to use it. Anything that allows them to talk and text for longer periods of time will keep them happy and satisfied for years to
come.
If a person has a businessman on his or her gift list, a cell phone booster is a terrific option. People who work in business rely on their phones in order to communicate with clients. There is
nothing more embarrassing than consistently dropping or missing calls. A cell phone booster will reduce the propensity for dropped telephone conversations. Any businessman will be thankful for a
device that allows them to conduct business in an easy and effective manner.
Shopping for ones parents can also be a perplexing experience. People often rely on flowers for their mothers and ties for their dads. A person should instead use some ingenuity and purchase a
cell phone booster for their parents. Although this technology has been around for a number of years, it will seem revolutionary to most parents. Many of them will marvel at the fact that they can
talk in any part of the house. This is a great present for parents that love to talk and communicate over the phone.
So for the upcoming holiday season, look for something that every person will love. Since most people have mobile phones, a cell phone booster is the ideal gift. They are terrific for any age group
and any demographic. So pick up a booster and reward the ones you love.If you have trouble talking on your cell due to a weak signal on the road, at home, or in the office, then a cell phone signal
booster can improve your reception and call quality. Do you need a booster for your weak signal? Many people report poor cell signals when traveling to different areas. Cellular boosters help you
by improving call quality and reducing dropped calls while being very easy to install.
Friday, December 20, 2013
Build a Bridge Circuit Diagram With One Power Supply
This is simple Bridge Circuit Diagram With One Power Supply. For systems with only one power supply, two op amps act as instrumentation and buffer amps. The OPA111 AM buffers the reference mode of the bridge and applies that voltage to the instrumentation amps ref terminal. Output is taken between the amplifier outputs to exclude the fixed output offset.
The additional op amp creates a bridge error of 2, where IB=bias current of op amp and R is the resistance of one leg of the bridge.
Bridge Circuit Diagram With One Power Supply
Monday, September 23, 2013
zBot 10 A Power Stage for DC Motor
If you look at the chassis of the zBot vehicle1, you’ll find two parts requiring intelligent control: the steering servo and the DC motor. The so called H-bridge is the normal circuit for electronic control of revolution speed and direction. The DC motor of a Tamiya car is powerful enough to propel zBot at up to 20 miles per hour.
The motor then consumes more than 10 A, so we choose high-current power MOSFETs for the driver stage. There are lots of different devices to choose from. The MOSFET we require has to supply the maximum motor current and, importantly, it has to be switched with gate voltages of about 5 V. In this case, the microcontroller switches the power stage (‘low side’) directly. For high side driving level shifters are necessary. The schematic of the H-bridge power stage shows a few inverters, NAND gates and two tri-stateable drivers. These logic functions are very important as the easier way, i.e.., directly controlling all four MOSFET has a fatal disadvantage.
In case of a software crash it could happen that two ore more MOSFETs are switched on incor-rectly for exam-ple, T4 and T7. In that case, the current through the transistors is limited by the internal resistors of the MOSFETs (about 10 mO) only. Such a fatal error would destroy the MOSFETs. The logic functions configured here effectively avoid illegal states.To control the DC motor, three signals are needed: DIR, PWM and STOP. DIR controls the direction of the motor revolution, PWM the speed, and STOP brakes the motor.
The software module for the DC motor is called dcm.c.(070172-I) The complete document called Zbot the Robot Experimental Platform is available for free downloading from the Elektor Electronics website. The file number is 070172-11.zip (July/August 2007).
Author: Jens Altenburg Copyright: Elektor
Wednesday, September 11, 2013
Build a Telephone Record Control Circuit Diagram
This simple Telephone Record Control Circuit Diagram will allow you to connect any tape recorder that has a mic and remote input to a phone line and automatically record both sides of a conversation when ever the phone is in use. You will need to take a couple of voltage readings before connecting the circuit. First determine the polarity of your phone line and connect it to the circuit as shown and then determine the polarity of the remote input and connect it to the circuit.
Circuit operation is as follows. When the phone is on hook the voltage across the phone line is about 48volts dc. When the phone is off hook the voltage will drop to below 10volts dc. When the line voltage is at 48volts the FET is off which causes Q2 and Q3 to be off. When the phone is picked up the FET turns on along with Q2 and Q3 which turns your recorder on. The tape recorder must be in the record mode at all times. As you can see the power source for the circuit is the phone line.
Circuit operation is as follows. When the phone is on hook the voltage across the phone line is about 48volts dc. When the phone is off hook the voltage will drop to below 10volts dc. When the line voltage is at 48volts the FET is off which causes Q2 and Q3 to be off. When the phone is picked up the FET turns on along with Q2 and Q3 which turns your recorder on. The tape recorder must be in the record mode at all times. As you can see the power source for the circuit is the phone line.
Telephone Record Control Circuit Diagram
Saturday, April 6, 2013
Making a Solar Energy Powered an iPhone Battery Charger
The project was termed as Mighty Minty Boost as it was developed to function as iPod/iPhone charger with solar power. Aside from being small, it has a large battery capacity of 3.7V at 2000mAh and it accepts input power from 3.7V to 7V. As shown in the images below, it can become a compact USB power supply when the solar cell is removed after charging. The Velcro is used to secure the Mighty Minty Boost inside a backpack or messenger bag after unplugging the solar cell.
For faster charging, a larger solar cell can be attached to the bag. Enough power can be generated to fully charge an iPhone in about 5.5 hours and an iPod Touch in 4 hours using a slightly larger solar cell with 6V at 250mAh. The charger will automatically switch to trickle charging when the cell reaches full charge. The charging current is limited to 100mA when charging using the mini USB port and the charging is limited to 280mA when charging using the barrel plug jack
For faster charging, a larger solar cell can be attached to the bag. Enough power can be generated to fully charge an iPhone in about 5.5 hours and an iPod Touch in 4 hours using a slightly larger solar cell with 6V at 250mAh. The charger will automatically switch to trickle charging when the cell reaches full charge. The charging current is limited to 100mA when charging using the mini USB port and the charging is limited to 280mA when charging using the barrel plug jack
.
The materials needed to build the charger include a small solar cell, Lithium Polymer battery charger, minty boost kit, adhesive backed Velcro, Altoids tin, connector/wire, and small double adhesive squares as shown in the images below. An input power that ranges from 3.7V to 7V maximum can be accepted by the single cell Lithium Polymer. In bright sunlight, the solar cell maxes out at approximately 5V at 100mA. A larger solar cell with 6V at 250mA can be used for faster charging.
The images below show the assembly of minty boost kit where a JST connector is soldered to the minty boost PCB instead of connecting the battery holder in the kit. The minty boost circuit is allowed to connect to the Lithium Polymer battery charger circuit with this tiny connector. The minty boost is tested by connecting the battery pack and the charger circuit, the Lithium Polymer battery connects to the connector marked GND on the charger board and the minty boost connects to the connector marked SYS.
To fit the charger, a notch is cut out of the other side of the Altoids tin and used double sided adhesive to secure the charging circuit to the bottom of the Altoids as shown below. The bottom of either one of the circuit boards should not touch the bottom of the Altoids tin while reconnecting the minty boost PCB and the battery to the charging circuit.
Connecting or adding the solar cell can be done in different ways. Shortening the connector leads and plugging the barrel plug into the barrel jack on the charging circuit is one way. The other method is using another JST connector to replace the connector and plugging it into the third connector marked 5V on the charging circuit. Since there is no bog barrel plug sticking out of the side of the tin, using the second method is cleaner.
As shown in the photos below, some 2” Velcro was used to attach the solar cell to the top of the Altoids. To help protect the battery, a layer of clear packing tape was used for wrapping. N top of the two circuit boards, the battery pack is then set down. A red LED on the charger board will light up when the Mighty Minty Boost is set out in the bright sun. The iPod/iPhone/USB powered device can be connected once it is fully charged.
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