6502.org Forum  Projects  Code  Documents  Tools  Forum
It is currently Sat Nov 23, 2024 1:24 pm

All times are UTC




Post new topic Reply to topic  [ 122 posts ]  Go to page Previous  1 ... 5, 6, 7, 8, 9
Author Message
PostPosted: Mon Nov 19, 2018 9:10 pm 
Offline
User avatar

Joined: Mon May 25, 2015 2:25 pm
Posts: 690
Location: Gillies, Ontario, Canada
That would be fun for sure.

The intersting thing is that even the Vulcan-74 board fully running only required 300mA to operate!
I was actually running it right off the +5V on the VIC-20 Cart port.

I have a large box full of brand new LM323 VRegs as well (VIC-20 style) , so I might as well use them.
No doubt, that beefy 3 amp monster will stay 100% cool since JetPack is 100% CMOS tech.

Brad



mojo wrote:
You could just build a switch mode power supply... Or even a linear one, but using discrete components.

Back in the day efficient switch mode PSUs were possible, just not common due to cost.


Top
 Profile  
Reply with quote  
PostPosted: Wed Nov 21, 2018 5:15 pm 
Offline
User avatar

Joined: Mon May 25, 2015 2:25 pm
Posts: 690
Location: Gillies, Ontario, Canada
Here is the final IO Buffer and Expansion RAM schematic.

Image

Viewable size...

http://lucidscience.com/temp/jpsch-io-nov18l.png

I have been picking away at the Video Generator now the VIC and MOAB get along.
Will have some photos and a video to show off on my next free Sunday hacking day.

Funny thing about the Video Generator... I have to build it completely in order to test it.
All counters, comparators, memory, sync logic, DAC, mixer, etc.


Brad


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 122 posts ]  Go to page Previous  1 ... 5, 6, 7, 8, 9

All times are UTC


Who is online

Users browsing this forum: No registered users and 16 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: