Hack N Mods

Discuss the new Altair 8800 Micro

Hack N Mods

Postby galaga » Mar Thu 03, 2011 3:40 am

Hack N Mods
I'll start.
adding a flashing led to the step switch so it would step though each instruction..
basicly i swaped the run stop switch with a on-off-on drilled a hole about 3mm for it to fit..

then ran the "flashing led" form the new hole to middle of the step switch.
------------|>|--------------
red or green I don't think is matters...

thanks matt.
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Re: Hack N Mods

Postby galaga » Mar Thu 03, 2011 4:08 am

2nd mod. After running my unit I found 5v reg was to hot for my taste.
as vbriel was nice and included a aluminium plate :)
so i unsolder the 5v reg and drilled a 3mm? hole found a 3 pin plug and socket off and old TV.
one cool regulator. :idea:
thanks matt
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Re: Hack N Mods

Postby wd5gnr » Mar Fri 04, 2011 1:22 am

I like the 7805 hack. Here's my RS232 hack: viewtopic.php?f=23&t=767

I want to make it more permanent and I need real RS232 to drive my recently acquired ADDS Regent 100/VT terminal. I'll have pictures of that soon.
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Re: Hack N Mods

Postby galaga » Mar Wed 09, 2011 3:12 am

are you going to have a switch internal/external or automatic switch :P
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Re: Hack N Mods

Postby vbriel » Mar Wed 09, 2011 2:47 pm

The latest firmware 5.0 will detect keyboard, if no keyboard the onboard terminal is no good so it will turn it off, leaving the RS232 hack free to run. The 88-DISK RAM card under development will have the serial to USB ready to go.

Vince
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Re: Hack N Mods

Postby galaga » Mar Tue 27, 2012 5:03 am

making the current on the 88-DSK-RAM lower.
I found the current on the backup battery was 2.5mA ..
so i look at what can do.. i removed the AVR and the current went down to 7uA cool.
here's what I came up with.. with 2 opto-coupler pc123
this mod is done close to the avr8515 so the pull up resistors are still working

I'm now going to add a BATT LITH 1/2AA 3.6V CYL W/LEADS should be good for 7-9 years
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