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    How i can use a 12 V 7 Ah battery to power up a 3w led light box

    in that case what will be the running hours in both load case 1. if am using 7w led pannel load (12v ,600 mA) 2. if am using 3W led panel (6v,500mA) in the above case as per your opinion which option is best using the 7w led panel structure or 3w led panel structure by considering 1. total...
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    7.2w led panel with 12v 7Ah battery

    Hi , i am trying to power a led panel of 7.2W (12V, 600mA) and a controller board with atmega8 microcontroller i want t run this circuit and light up the led panel for 4-5 hrs is that possible to achieve this running hours with 12v 7,Ah battery .to achieve this what is the battery capacity that...
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    How i can use a 12 V 7 Ah battery to power up a 3w led light box

    sorry for the mistake the led panel is 3w (6v ,500mA) in this case 7805 will heat up right? so ow can i avoid that if i use a dc to dc step down converter module is that ok is there any other stable and reliable way to take 5-6v 500mA from the 12V 7Ah battery
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    How i can use a 12 V 7 Ah battery to power up a 3w led light box

    hi my led panel is using 6v 100 mA in this case how we can power the led panel from the 12v 7Ah battery - - - Updated - - - is that ok to use a dc to dc down converter, in this case what will be the running hours
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    How i can use a 12 V 7 Ah battery to power up a 3w led light box

    Hi, i want to take power from a 12v 7 ah battery to 3 watt led board (the led board contains 50 units of 2 led connected in series linked in parallel along with a 56 ohm (please ignore the 470 ohm ) in series as in the image .when i use 7805 to reduce the voltage the ic is getting very hot ...
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    [AVR] Count down timer using avr

    i want the source code design , the counter should have the following 1. the count should start from the number specified by the 3 bit input to the micro controller 2. the count starts only when the enable pin is high i want to design it in codevision avr compiler , when i am trying to do this...
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    [AVR] Count down timer using avr

    hi i want to design a count down display using avr ,the counter should produce a interrupt signal or indication when the count reached at zero , the count length has to be variable , so that it can be changed as per requirement . am using code vision avr compiler , can anyone help me in this...
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    How smps provide current ?

    my question is , whether the smps provide output current as per the requirement of the load or not m simply smps out put current is consonant or not basically, if it is not constant then my idea will work i need only 12 v , 3.5 A max at any instant during the operation , since am providing the...
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    How smps provide current ?

    hi, I am using A 24V 10 A SMPS to power my project work, it consumes different current rating in different intervals , i want to know how the smps provide current to the load, if i connect a LOAD that require 12 v 600 MA is that possible to use 12 v 10 A smps here , is there is any chance...
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    Power supply design help

    hi thank you for your time , please let me know if i want to get back up of two weeks , how can i do that , which kind of battery will help me to do that , what will happen i remove the 56 ohm resistor connected in series with the each four series led in led panel, it will help to reduce the...
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    Power supply design help

    How can I do that , all what I want high bright led panels ,the panel construction can't be changed because it is very difficult to re assemble all led connections , the circuit can be modified, so provide me a bit st solution to run this with minimal power loss and max possible battery back...
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    Power supply design help

    thank you for your response i missed your answer,since am powering it from 24v (two 12v,7 ah in series), i have to regulate it to 12v am i right otherwise high voltage will burn the led, if i use 12v 7 ah single battery if battery drops to 10 the panel will not work since each sub module (...
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    Power supply design help

    Power design for led lighting hi, am using 12v 7 ah battery to power 13 led modules used for led lighting , i want to know is it possible to power these 13 panel from this 12 v 7 ah battery using a simple resistor network or using series resistor ? the each panel structure is as follows 4...
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    global variable accessing problem

    tried but no result , same response undefined variable
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    global variable accessing problem

    i declared the variable 'x' before void main function, even after that am getting the same error, you can see that a variable 'x' is declared before the void main function . 1 #include <mega8535.h> #include <alcd.h> #include <delay.h> // External Interrupt 0 service routine interrupt [EXT_INT0]...
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    global variable accessing problem

    hi, i tried to use interrupts in at8535 to perform a switch operation , am getting an error my code #include <mega8535.h> #include <alcd.h> #include <delay.h> // External Interrupt 0 service routine interrupt [EXT_INT0] void ext_int0_isr(void) { x=1; // when int0 pressed x =1 } interrupt...
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    Power supply design help

    yes , i used a heat sink am using 24v 7 ah battery as power source (12 v 7 ah in parallel ). also let me know if i want to regulate the power to derive normal atmega 8 from this power source how can i do that , i tried to down the 24v to 12 using 7812 then i used 7805 to down further the...
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    Power supply design help

    hi, i want to design a power supply which can drive an led array (30 parallel led module each module consists of 4 series led connected with 56 ohm resistor)i want to drive led panel like this , i tired to build one using 7812 and lm 317 but the 7812 is heating itself continuously so can anyone...

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