12v Solar Battery Charger Circuit >>

 In the field of physics star technology is extremely well-liked currently a days  and growing day by day. star gadgets additionally|also are|are} taking attention of peoples and uses of alternative energy is happening not solely in out facet of cities and area wherever no wattage is on the market however also in cities
Here could be a star device schematic which might charge twelve potential unit SLA batteries. This solar panel charger circuit has car stop perform therefore it\'ll mechanically stop charging once the battery become full charge.Electronics Circuit Application

 

USB charger circuit >>

This is a conveyable battery steam-powered USB charger circuit. This circuit is ready to charge your PDAs, Ipods, Mp3 players and any device that insert to a laptop USB to charge. If you work this circuit in an exceedingly little box with a 9V battery then it'll become a conveyable emergency USB charger.
The schematic is therefore easy victimisation solely few parts therefore you'll be able to build this circuit in some minutes if all elements out there with you. The circuit is victimisation low dropout regulator IC LM7805 that is well out there within the market and it's additionally rock bottom. The circuit takes voltage from 9V battery and step down the voltage in to a DC 5V output 

 

Electronics Circuit Application

 

T-Mobile myTouch 3G Master reset using hardware >>

Before performing a master reset using hardware buttons, first attempt:

• Soft reset, see Soft reset - T-Mobile myTouch 3G / 3.5 mm / LE.
• Clear system cache to reset, see Clear system cache to reset the phone - T-Mobile G1 / myTouch 3G / 3.5 mm Jack / LE.
• Master reset, see Master reset - T-Mobile myTouch 3G.

If the phone is locked, frozen, or unresponsive, you can perform a master reset using the hardware keys instead of the menu. A master reset restores the original factory settings and may erase all downloaded content, including ringtones, images, programs, and contacts stored in the internal memory. It does not erase data stored on the SIM card or memory card (if available).

To perform a master reset using hardware keys, follow these steps:

1. Back up your data. See: Prepare for a master reset and back up data on Android
2. Turn off the device.
   • Note: If the device is unresponsive and does not turn off, remove and then reinsert the battery.
3. Press and hold the Home key.
4. While already holding Home, press and hold the Back key.
   
   
5. While holding both keys, press the Power key and release it. Do not hold it.
6. Release the keys when you see Androids on skateboards.
   Note: If you do not see this, you have the incorrect software version for this proceedure. See: Master reset using hardware buttons - T-Mobile myTouch 3G with Android 1.6.
7. If you see a CLEARSTORAGE option, select it.
   
   
8. Press the Trackball (action) to select YES.
9. When the device says Send, press the green Send key.
   
   
10. Wait as the device turns off and back on.
11. If unable to access the internet after performing the reset, see Verify the Access Point Name (APN) and internet data connection - T-Mobile myTouch 3G / myTouch 3G Slide / myTouch 4G.

Important: This procedure is for the newest software version. To check the software version, see: Verify software / flex version - T-Mobile myTouch 3G / 3.5 mm / LE. For phones with old Android 1.6 software that have NOT been updated to Android 2.2 (Froyo), see: Master reset using hardware buttons - T-Mobile myTouch 3G with Android 1.6.

Electronics Circuit Application 

Transformerless Power Supply circuits >>

Many times we want a simple power supply to operate our low power electronics or electronic circuits. Most of the power supplies use transformers but there is also some tricks to get voltage of your needs from transformerless power supplies. Transformerless power supplies are very

important and works well on the places where you have short place and low mA requirements. The circuit mentioned here is a simple and verastile power supply circuit which is capable of delivering any voltage from 3 to 12 volts by selecting suitable parts values you can obtain voltage of your needs.
Here are some details of part values you can change to get the required voltages.

For  3V Use  R2 = 15K, D2 = 3V & C1 = 220µF
For  6V Use  R2 = 12K, D2 = 6.2V & C1 = 220µF
For  9V Use  R2 = 10K, D2 = 9V & C1 =  220µF
For 12V Use R2 =  10K, D2 = 12V & C1 =  470µF

Note: Many of its points are at AC mains voltage. It could give you lethal shock if you are not careful. If you don't know much about working with AC line voltages do not attempt to construct this circuit. Electronics Circuit Application

Lead Acid 12V Battery Charger circuits >>

There are a cardinal of credibility we allegation to awning about the affliction and use of Sealed Lead Acid batteries.

Firstly, these batteries allegation be charged, absolved and stored actual carefully.

We commonly anticipate batteries can be stored for months (if not years) and they will be accessible for actual use.

This is not the case with SLA batteries.

If you abundance a NEW, abounding answerable SLA array for 6 months or more, you will acquisition it may be absolutely discharged.

You may additionally acquisition you cannot allegation it!! It may be worthless.

That's how aerial SLA batteries are.

They allegation be answerable on a approved base to anticipate them absolution to a actual low voltage level.

If the terminal voltage of a SLA array is accustomed to go beneath 8v, a action alleged SULPHATION starts to awning the apparent of the plates and prevents the array actuality re-charged. The centralized attrition of the array increases and it becomes useless.

Parts List.

2 - 1R8 0.5watt resistors

1 - 150R 0.25 watt resistor

1 - 180R

1 - 560R

1 - 1k5

3 - 2k2

1 - 3k3

1 - 4k7

1 - 8k2

1 - 1k mini trim pot

1 - 1n ceramic

2 - 47u 25v electrolytics

1 - 5mm red LED

4 - 1N4148 arresting diodes

1 - 10v 0.25watt zener

1 - BC 547 transistor

2 - BC557 transistors

1 - MCR100-6 SCR

1 - 1m red lead

1 - 1m atramentous lead

2 - alligator clips

1 - 2m actual accomplished solder

1 - SLA Array Charger PCB

Also required:

1 - 12v AC agent (500mA AC)

1 - ability lead

Huawei CDMA PHONES circuits board

Huawei CDMA PHONES circuits board Phone Parts and Components

Electronics Circuit Application

STK465 Stereo Amplifier circuit >>

STK465 Stereo Power Amplifier circuit

STK465 - 30 watt Stereo Power Amplifier

Source: http://sharingmanual.blogspot.com/2012/08/stk465-30-watt-stereo-power-amplifier.html

Completed STK465 is an amplifier of acoustic frequencies that offers qualitative output, using minimal exterior elements. Substantially he is one of big completed force. When it functions with tendency 56V then the tendency will be ± 28V as for the ground. With this recommended tendency of catering, the attributed force is 30 WRMS in charge 8 Ohm.

The STK465 Amplifier circuit is stereo and has two channels of amplifier in a nutshell. It is a formal designing that develops positively all the particularities completing. The amplifier can be supplied from a line of double polarity. Still it can function under a wide region of tendencies (±10V as ±28V). The requirements of current depend from the force of expense and it can they begin from 120mA up to 1A. It is very important the catering to be sufficiently unharnessing, so that is avoided imports of annoying noises.Electronics Circuit Application

0-30V 2A Adjustable Laboratory DC Power Supply circuits.

 

 PCB of Cheap adjustable 0-30V 2A Laboratory DC Power Supply

This 0-30V power supply is the variable voltage Regulator at 2A max, by used IC-723 for control volt stable regulated. The 2N3055 power transistor for boost up current to 2amp.
It suitable for general electronics work shop. Because it is a simple circuit and easy circuit. In addition to this has the over current protection as well.

This circuit is designed using LM723 voltage regulators IC –DIP 20pin maintain a constant voltage, and a power transistor as the way through the current to can be used up as wanted.
The circuit was designed also with overload protection or short circuit in the output. The amount of current flow will not exceed the set. Because it is monitored constantly by R4.
When the current flows through the R4, until the 0.6V voltage drop across it. Making Q3 runs short the bias voltage between the base-emitter of Q2, it stopped working. Now, the Q1 stop working because does not has the bias voltage to base pin its, The output voltage is zero or down quite a close to zero.
The potentiometer VR1 acts as adjust the voltage that enter to the LM723 for the volt output by you want. By the our circuit can adjust the voltage output from 0V to 30V.
In use real, because the properties of the transistors used and values error of each device. Therefore, if the circuit can not be supply up to 2 A. Try changing the value of R4 is a lower value, until has the maximum current desired. Should be to use transformer 3A. The Transistor to Hold Heat sink as well.Electronics Circuit Application

NiCd & NiMH Battery Charger Circuit >>

A very interesting and useful design of a multiple nicd & nimh battery charger circuit which can charge many different NiCd and NiMH batteries. It can be used to charge batteries of many electronic devices for example radio, mp3 players, cellular phones and lots of other devices.
You can charge multiple voltage batteries with the help of  the input voltage chart given below for example if you want to charge 1.2V battery then the minimum voltage should be 6.5V and maximum should be 10V. You can also change the output current to desired value by changing the value of resistor RX. The output current chart is also mentioned below. It is better to charge a battery with a current ten time smaller then the battery capacity. If you double the charging current then the battery will charge in half time. I suggest you to charge the battery for 15 hours if you select charging current ten times smaller but if you double the charging current then the battery will become charge in 7 hours.

Electronics Circuit Application

latest HTC Drivers available for download > HTC Sync Manager App >>

Android devices or its open associated AOSP ( Associated Open Source Project) have numerous common technical derivatives from Linux OS, and therefore they work with Linux-based systems without requiring additional configuration. This is valid for all Linux or OS X systems that have common ground by default. Even if Windows is the most common operating system in the world, things are a little different when it comes to connecting a peripheral device to a PC which is running Windows. On Microsoft operating system any hardware device that is attached to it, it needs some proper drivers to establish communication between the two devices.

This is not something new if you use a Windows PC, but when it comes to specific devices like android phones or tablets, they require more specific drivers than other devices.
It is the same situation in the case of HTC devices, because more and more devices come with their own way of using and drivers separately, so HTC devices is equipped with Android specific drivers depending on the version of Windows you are using.

Since such drivers are more specific for their HTC device, users faces some issues in locating  the specific driver for their HTC device. For that reason,  the HTC Company comes with an easy way to download and install the suitable drivers for the entire HTC specific device from its portfolio.  This solution is named HTC Sync Manager, which is a free application for your Windows based PC that is especially developed to sync all your media file from your HTC device with your PC. After the HTC Sync Manager application is installed, the suitable driver for your HTC device is installed on the same time.  Also you can use the HTC Sync Manager to sync all your personal contacts, your agenda events, documents, bookmarks, images as well.

On the HTC Sync Manager list we’re finding almost all HTC Android devices on the market, devices such as HTC One, HTC One S, HTC One SC, HTC One SU, HTC One SV, HTC One V, HTC One x AND X+, HTC One VX, HTC One XC,  HTC Butterfly, HTC J Butterfly, HTC Desire C, HTC Desire U, HTC Desire V, HTC Desire VC, HTC Desire SV, HTC Droid DNA, HTC Droid Incredible 4G,  HTC Desire X, HTC One S Special Edition, HTC J, INFOBAR A02, HTC T327d and TC T327w.

Download latest USB HTC drivers (included on HTC Sync Manager) for all HTC Android Phones from Here

•   The HTC Sync Manager will be installed on a Windows PC with the next hardware Requirements: Intel Pentium III or higher for the CPU clock speed, 1 Gb of RAM minimum, 1024 * 768 video resolution or higher, 300 MB of free space on the hard disk, and also a USB 2.0 will be used for connecting the HTC device to PC.
• The software requirements and the supported Windows OS for the PC:
• Windows XP Home, Professional, Media Center Edition (32-Bit); Windows Vista Ultimate, Enterprise, Business, Home Premium and Basic Edition for both 32 and 64 Bit; Windows 7 Home Premium and Basic Edition, Professional, Ultimate (32 and 64-Bit); Microsoft Office Outlook 2000 and up.

How to download and install the latest Drivers for HTC Android device included on HTC Sync Manager Application:

1.  Download the HTC sync to your PC.
2. Run the downloaded executable file to install it on your computer and follow all the wizard steps. (Make sure that your Antivirus allows this file installation).
3. Select “Complete setup type” for an easier and faster installation or you can select “Custom” in case you’re an advanced user and you want to change the default installation path.
4. Press “Finish” to finish the installation.
5. Enable the USB Debugging option from the following path: Settings > Applications > Development .
6. Now, connect your HTC smartphone to PC using its original USB cord.
7. Choose the USB type connection on your smartphone by pressing the HTC Sync and then Done.
8. Next, wait for your HTC to be recognized by HTC sync.
9. Enter a name for your HTC smartphone and click “save”.
10. Now, set up your sync options.

NiCd Battery Charger Circuits >>

The circuit is able to charge 2.4V, 4.8V, and 9.6V NiCd batteries. The LM317T IC showed in this NiCd battery charger schematic is use to regulate the voltage to battery charge the NiCd batteries as you know that the LM317T IC is a very popular IC from many years, it is a cheap
IC with many built in features like current limiter, built in thermal overload protection, safe area protection etc. The circuit is using center-tape transformer, which is input 220 and output is 9V-0-9V.
Electronics Circuit Application

6V 4.5AH Battery Charger Circuit >>

Here is a 6V 4.5 AH battery charger circuit which is able to charge 6V 4.5 AH lead acid batteries. The schematic is very simple and using only few components. IC LM317T is the heart of the circuit. The circuit is automatic so when the battery will become full charge it will stop charging.
These type of circuits are very useful for solar garden light and can also be used in other circuits like emergency led lamp etc. Use transformer 230 AC to 9V / 500mA
Electronics Circuit Application

LM 3909 Simple LED flasher circuit >>

This is a very simple LED flasher circuit using LM3909 IC. LM3909 is a great LED flasher IC operated only on 1.5 volt DC and gives a bright-high current LED pulse and work on wide temperature range. This IC has a very low current consumption due to which a 1.5 volt (C) size cell or 1.5 volt AA  

speaker protection circuit >>

 

Why to have The speaker protection circuit? How do the speaker protection circuit can prevent the speakers? This may be questions understand of somebody, and if you have not yet received a satisfactory answer, here is the answer.
For the power amplifier circuit in the new version, usually popular to build by the direct coupling circuit, from the the amplifier circuit to the speakers directly, or as also known as the OCL amplifier circuit. Which this pattern are both positive and negative power supply circuit, or what I call is the three wire power.
Features of this circuit has the advantage is that the frequency response is better than any other circuit. But it has the disadvantage that when the circuit is damages. In any case, it may be has a DC voltage positive or negative that the higher like the power supply, output to Immediately the speakers.
With this voltage, will make coil of the speaker is burned and lack of eventually, so if we do not want to the speaker is usually the most expensive audio system, need to damaged. We need to do is cut this voltage not go out the speaker. We call this circuit. Speaker protection circuit. As shown below.

Working of circuit
As shown in this circuit, we take a some signal from the speaker enter through the resistors R1, R2 into the protection speakers section, By reducing the signal strength lower down, then after the capacitor C1 serves to bypass this signal to ground.
However, if the dc voltage to either positive or negative, whatever this voltage is passed through the bridge diode circuit immediately, by they will be setting voltage input is positive or negative to the positive voltage to the base pin of Q1 doing the Q1 work.
When the Q1 working, will make the collector voltage low down, the bias voltage at base pin of Q2 will also lower down, making The Q2,Q3 stop run therefore not have current pass through the relay RY1, so it will be cut off the signal of power amplifier without to output speaker at once. The speakers will safe from the dc power.
To be used.
1. to connect the ground wire from the amplifier to ground of the protection speaker.
2. to connect the signal output from the the amplifier to the speakers,we connected it to the IN of the protection speaker to both the left and right.
3. to connect the OUT signal from the speaker to the positive terminal of the protection speaker.

Electronics Circuit Application

Variable Adjustable power supply circuits >>>

Features:

Regulated Adjustable Voltage out 2-30VDC

High Current Output 5A (based on transformer selection).

Adjustable Current Limit

Can be used as a variable current supply.

Based on LM317 Voltage Regulator.

Built in protection diodes

Speed controlled fan connection (based on current draw).

Current meter connection (0.1V/1A

                                         Circuit Diagram

Features universal capcitor mounting/spacing to allow various capacitors to fit.  Mounting pattern that fits TO-200 or TO-218/247 for pass transistor and transistor used for current limit circuit.  Fan connection uses connection compatible with standard PC fan connection; allowing use of PC heatsink fan combination.

Circuit Board Layout

Electronics Circuit Application 

 

Sealed Lead Acid 12V Battery Charger circuits >>

 Sealed Lead Acid 12V Battery Charger circuits.

There are a cardinal of credibility we allegation to awning about the affliction and use of Sealed Lead Acid batteries.

Firstly, these batteries allegation be charged, absolved and stored actual carefully.

We commonly anticipate batteries can be stored for months (if not years) and they will be accessible for actual use.

This is not the case with SLA batteries.

If you abundance a NEW, abounding answerable SLA array for 6 months or more, you will acquisition it may be absolutely discharged.

You may additionally acquisition you cannot allegation it!! It may be worthless.

That's how aerial SLA batteries are.

They allegation be answerable on a approved base to anticipate them absolution to a actual low voltage level.

If the terminal voltage of a SLA array is accustomed to go beneath 8v, a action alleged SULPHATION starts to awning the apparent of the plates and prevents the array actuality re-charged. The centralized attrition of the array increases and it becomes useless

 Parts List.

2 - 1R8 0.5watt resistors

1 - 150R 0.25 watt resistor

1 - 180R

1 - 560R

1 - 1k5

3 - 2k2

1 - 3k3

1 - 4k7

1 - 8k2

1 - 1k mini trim pot

1 - 1n ceramic

2 - 47u 25v electrolytics

1 - 5mm red LED

4 - 1N4148 arresting diodes

1 - 10v 0.25watt zener

1 - BC 547 transistor

2 - BC557 transistors

1 - MCR100-6 SCR

1 - 1m red lead

1 - 1m atramentous lead

2 - alligator clips

1 - 2m actual accomplished solder

1 - SLA Array Charger PCB

Also required:

1 - 12v AC agent (500mA AC)

1 - ability lead

Electronics Circuit Application

3Vdc to 12Vdc step up DC converte circuits >>

The 3Vdc to 12Vdc step up DC converter by IC LT1073-12,

 

When we have a battery of two cell 1.5V AA batteries or 3 voltage input source, but want size of voltage 12VDC. This circuit can be done, but when we use the battery voltage size of 2 V will be has a current is about 35mA only, That’s something we accept, In some work we use low power interface, such as : an op-amp circuits, digital CMOS circuits and others. In addition to I have the boost up DC volt, more 3 circuits, with the same circuit is a little device, information about the device. You can see it in circuit