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1096  Using Arduino / Project Guidance / Re: Fading LCD backlight via PWM pin on: March 22, 2012, 12:20:57 pm
Well you have the very right transistor , utilise it just like you would run a relay ,I have written other things already, in the above post.   smiley-kiss
1097  Using Arduino / Project Guidance / Re: Fading LCD backlight via PWM pin on: March 22, 2012, 11:42:46 am
You can in such a case use a transistor with its base connected to the pwm pin with a 220min resistor, just like you drive a high power motor or relay,take care of the base current needed to turn the transistor on as chip can supply a max of 40ma.
1098  Using Arduino / General Electronics / Re: power supply all most done i want to test it and see what it is good for any ideas ? on: March 22, 2012, 07:49:59 am
If you are looking for shorting out (sorry, its hard to understand your language flow dn;t mind it smiley-roll) why do not you check out for the continuity, just telling you what i was able to deduce from your statements.

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Nishant
1099  Using Arduino / Project Guidance / Re: Fading LCD backlight via PWM pin on: March 22, 2012, 06:30:49 am
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Putting 5v into the backlight and then using the PWN pin as a drain to control the brightness.

Putting +5v from the PWM pin of the arduino to anode of an LED and ground to ground of the arduino will make it work.
1100  Using Arduino / General Electronics / Re: power supply all most done i want to test it and see what it is good for any ideas ? on: March 22, 2012, 04:12:23 am
Simply utilise a Multimeter Analog/Digital to know what you are getting on the outside.
1101  Using Arduino / Microcontrollers / Re: Help... Newbee on: March 22, 2012, 04:04:23 am
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I am aware of C++ programming but not C but i guess they are similar

Guess not  smiley-wink its C only ,c++ is actually known as C with 'Classes' actually named as this way by Bjarne Stroutstrup who worked on c to extend it to classes plus all this, C++ is a object oriented language that means that one programmer works on it by making and working on instances of objects with implication of concepts like Encapsulation, Inheritence(one more is there just not on my mind) etc..

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that i want to write a simple blink program to a atmega 8.

Just write the code for blinking for any of ATmega168 and ATmega328 and you can after compiling the sketch load the Binary out of it to the ATmega8 by using a traditional programmer like MKII/AVR isp programmer you can get this in south India for about 500 to 1000 bucks its pretty much useful and will work because internal architecture of all these chips is same they only differ in the fact of flash memory, EEPROM ,pinout is same.

If you want to load this ATmega8 with bootloader then you can load it by using the Arduino as a ISP programmer, more on that you can learn on the site examples/playground.

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Nishant

1102  Using Arduino / Project Guidance / Re: Why led be is dimmer in pin 2 than in pin 13 ? on: March 22, 2012, 03:04:04 am
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Are you using a resistor?  It might have too much current going through it, making it dimmer(I'm not sure if that's possible, but maybe?).

That resistor is a current limiting resistor that simply limits current and thus controls too much current to be at a level which is comfortable to make the LED lit and not burn it, if you use a Led without a resistor then it will burn with outrageous brightness and will first get hot and then its filament with in will burn by becoming hot and will melt.
1103  Using Arduino / Project Guidance / Re: using arduino for atmega8535 on: March 22, 2012, 02:59:05 am
HI Sandesh, why don't you ask some guys from the AVR-developers site i think they would have taken that up already and can help you with the code.
1104  Using Arduino / Project Guidance / Re: Fading LCD backlight via PWM pin on: March 22, 2012, 02:44:46 am
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define up 1
define down 0

Should be like:

Code:
#define up 1
#define down 0
1105  Using Arduino / Project Guidance / Re: Reading serial data from a touch screen on: March 20, 2012, 11:27:59 pm
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The touch screen uses a USB to power itself, and I assume it operates on 5V

Mostly the LCD use 4.5 to 5v for driving the logic chip whereas you can also checkout the datasheet that i think one must refer to before even connecting it.(The back light current is + logic driving voltage and consumes upto 200mA's max in case of GLCD with limiting resistors)

have you checked your RX and TX connectivity are they hooked in the right way?
1106  Using Arduino / Project Guidance / Re: Bug Zapper on: March 20, 2012, 11:21:11 pm
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Just look out for voltage and current levels of the spikes generated.

By this statement i mean;t that only to measure first from a mulitmeter how much severe the spikes are when a bug gets zapped the we an use voltage dividers to lower the  voltage and/or zener  spike shock level and capacitor to smoothen the current.
1107  Using Arduino / Project Guidance / Re: Bug Zapper on: March 20, 2012, 11:18:27 pm
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I have to buy my uno still I'm just trying to figure out everything before hand I guess

UNO is the best to own as a beginner ,so you can have it without thinking further ,you'll be glad to have it  smiley-grin .
1108  Using Arduino / Project Guidance / Re: flip flop it or 4051 it? on: March 20, 2012, 11:16:30 pm
What MM of LED are you using?
1109  Using Arduino / Project Guidance / Re: Bug Zapper on: March 20, 2012, 11:05:57 pm
If there is a spike in the level of input voltage or current that can be measured on ADC's/digital pin inputs and then simultaneously an LED display can be driven so show the count.

First you have to get a way to measure the bug zapping if its been noted then other things are quite easy.
1110  Using Arduino / Project Guidance / Re: Wifi on: March 20, 2012, 10:56:23 pm
apart from wifly shield you can also go for the Async labs WiShield from cutedigi as Async Labs is out of business but the wishields but can be bought from cutedigi.
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