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Projects Q/A / Re: The Link Telephone Intercom
« Last post by Cory D on October 20, 2014, 09:02:44 PM »
The Newbie has struck again...LOL...oh, that's me! I have a question...for the lack of knowledge of abbreviations, what does "+ve", "-ve", "MR", "EN", and "R"? I think the "R" means Reset. A friend told me I can find these abbreviations in a book called "Ugly's Book of Electronics" or something like that. Thanks!
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Electronic Projects Design/Ideas / Re: Programmer
« Last post by KINGTIGER on October 20, 2014, 12:58:15 PM »
thanks everybody for reply and yes i read and its an old programmer but thougth i can program atmega8 with its ICSP connector cant i? i want a hi voltage programmer if anybody has made please help
3
Electronic Projects Design/Ideas / Re: Programmer
« Last post by redwire on October 20, 2014, 09:59:10 AM »
I agree 100% with Electropepper.   Buy a commmercial programmer or build one from a kit.  You will find support in either case if you have questions.  The one shown looks old and who knows if it supports the chips you will eventually want to program.   Do you plan to use AVRStudio for writing and compling your programs?
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Electronic Projects Design/Ideas / Re: Programmer
« Last post by Electropepper on October 20, 2014, 06:35:54 AM »
It looks like its for PICs, but like KINGTIGER says read more about where you got the schematics from, also that programmer looks rather old, its still using LPT, yucc  :P .
HERE  It includes schematic and firmware to build yourself.
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Electronic Projects Design/Ideas / Re: Programmer
« Last post by liquibyte on October 19, 2014, 11:24:28 AM »
hello everybody
im new in electronic specially microcontroller and in here :))))) so i start with a question
can i program ATMEGA8 WITH this programer? and how?
thanks
Have you tried reading the documentation where you got that project from?
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Electronic Projects Design/Ideas / Programmer
« Last post by KINGTIGER on October 19, 2014, 05:09:36 AM »
hello everybody
im new in electronic specially microcontroller and in here :))))) so i start with a question
can i program ATMEGA8 WITH this programer? and how?
thanks

7
Inventive/New Ideas / RF vs FCC (and some secret science)
« Last post by wdw86 on October 14, 2014, 03:30:23 PM »
I'm brand new here.

I took Electronics on Vocational school... but then I got into PCs and completely forgot everything I learned. I can vaguely remember the stuff, and I know I'll pick it back up as I work..

That said, I've developed a new idea that I'm going to hold very close to my chest. Without naming any specifics, I need to generate an RF signal within the ISM band.

What are my limitations there? I don't want to broadcast the signal, it is purely local. Can I generate this signal with sufficient shielding that the FCC never knows I'm doing it? I don't really want to hide what I'm doing as much as I just don't want to bother anyone else. Basically, how does the ISM band work for an amateur user? Do I need permission to mess with frequencies in that band? Does it depend on what frequency I'm using?

Thanks.

W2
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Projects Q/A / Re: 0-30V Stabilized Power Supply
« Last post by liquibyte on October 12, 2014, 10:35:40 PM »
That was the consensus by Tim too.  I'm wondering if the 2N3055's are at fault here in some way by allowing voltage and current through at power on by being hit by the initial surge.  Is that possible?  Would a higher Vceo help with that?  I'm certainly no expert either but since I started using LTSpice, I've been learning a bit faster than I was.  It's a neat program once you get used to how it works.
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Projects Q/A / Re: 0-30V Stabilized Power Supply
« Last post by redwire on October 12, 2014, 10:00:40 PM »
These actually look pretty good to me but I'm no expert.
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Projects Q/A / Re: 0-30V Stabilized Power Supply
« Last post by liquibyte on October 12, 2014, 08:33:00 PM »
Excellent, that's what I wanted to see, thanks.  I'm trying to get a few more eyes on the problem and was asked about the voltages across the voltage pins for those op amps.  One of these days I'm going to get at lease a cheap DSO.
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