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Search: Posts Made By: Geoff Harrison
Forum: Altair 680 06-05-2008, 11:45 AM
Replies: 7
Views: 25,699
Posted By Geoff Harrison
That's an interesting thought, I've read 7805s...

That's an interesting thought, I've read 7805s don't like to see high voltage on their output side.

I unsoldered the resistor and the regulator is putting out a solid 5v now, but I don't know...
Forum: Altair 680 06-05-2008, 01:46 AM
Replies: 7
Views: 25,699
Posted By Geoff Harrison
I'm up :D ...

I'm up :D

http://www.solivant.com/misc_images/altair680_first_words.jpg

After installing the ICs, I tentatively powered up and the 5v rail was reading 8v. Scary, but it was dropping slowly. ...
Forum: Altair 680 06-04-2008, 11:57 PM
Replies: 7
Views: 25,699
Posted By Geoff Harrison
Following up on my own question, I attached a 12v...

Following up on my own question, I attached a 12v incandescent lamp to the 5v line as a load, and the voltage came down to a much more reasonable level (actually a little below 5, but that's better...
Forum: Altair 680 06-04-2008, 08:41 PM
Replies: 7
Views: 25,699
Posted By Geoff Harrison
Almost ready to power up

I've got the motherboard finished and I'm checking the voltages before I insert the chips and everything's kind of high, but I suppose that's to be expected with no load.


Should be ...
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