Huh? What is free? You mean the PIC? Can be rite? I'm lost ???

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YES order SAMPLES...

 

Whaow! You mean I can do that? But how? As in from who? Or which company? ops: Sorry for my blur question.

I was thinking to purchase them from Farnell. (heard of this company?) Any advice on how can I get free samples? I'm from Malaysia.

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thats ok i think mine came from Taiwan..
ok go to
www.microchip.com
top left search .. type in 16F628A
then click on the 628A
next screen right under spec sheet click on samples
Sorry about the extra dots on the link

 

Oh no.....I'm from Malaysia and it states that its one of the country where they wont send the samples to

I'll go buy them then. Thanks!

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aaaaaw..sorry

 

I read about this Half-Bridge Converter, it states that it is recommended to run loads between 500W to 1500W.

Can I still use this to convert from AC to a DC level and uses a buck converter to step-down the voltage for charging purposes? ops:

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got link?

 

It's no more complicated than a 16F84, it's an upgraded direct replacement. There's only one change required to the code, and that's to disable the comparators - it takes two lines.

No point carrying on using obselete expensive parts!.

The 628's internal 4MHz oscillator even makes it far easier to use than an 84!, and it even has a hardware USART.

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PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

http://henry.fbe.fh-darmstadt.de/smp...w_hilfe_e.html

Thanks

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Lord Robert Stephenson Smith Baden Powell\'s last message : -BE PREPARED-

 

You still haven't mentioned any values?, input and output voltages and output current would be helpful!.

As a matter of interest, I've never seen that half bridge converter circuit used in domestic electronics - even switchmode microwaves don't use it, and they are about 1000W or so. I am aware of the configuration though, as far as I'm aware it's to allow you to use lower voltage switching devices?.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Sorry, I was thinking of:

Input - 240V AC and Output - 12-14V DC? (For charging purposes)

Is that the appropriate range needed for charging? ops: sorry

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By the way, if the Half Bridge Converter can be implemented to obtain a DC voltage level of 12V for charging purposes, how do I determine the values of the capacitors? ops:

Is there any calculations involve? Or I can just use high value, approximately 100microFarad?

Real sorry as I got to go to bed, have been staying all night long, its 6 in the morning here, having class later. Will be back to check replies? Thanks a lot...

Bye! Sorry to trouble you guys.

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Lord Robert Stephenson Smith Baden Powell\'s last message : -BE PREPARED-

 

how about a simple stepdown transformer..Got any lying around??
and a full wave rectifier.. filter caps .. Regulator...
Can u use a regulator.??

 

Oh, I did that. I mean, are you talking about a linear regulator? I submitted that during our discussion with our lecturer last week but he wanted me to implement switching regulators instead of a linear regulator.

ops: Correct me if I'm wrong, are you saying that, from the power supply, using a step-down transformer then rectifies it thorugh diodes and a capacitor in parallel with the load? ops: Hope I'm not talking nonsense...

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