Future PSU designs

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exxos
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Re: Future PSU designs

Post by exxos »

I've done a PSU variation with 12V linear regulator. Will order 5 pcs and build them up and review. These will be easier to assemble as less parts involved and should work out a fraction cheaper to produce.

PCB is a fraction smaller than before and I have moved fuse holder as it is a little bit in the way of the top right screw hole.

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Re: Future PSU designs

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Prototype PCB's arrived today. Will build one up and evaluate it next week.

I think once the current batch of PSU's have sold, I doubt I am going to be making those again in favour for the "low cost" version as shown below. Though the price for them may not be a huge difference anyway (only like £5 at a guess) . Though I can't keep soldering this many parts on PCB's by hand all the time, which is my motivation to reduce parts count to speed up production of them. I may also swap out the though hole resistors for SMT. I was against this originally as it "cuts" up the top heatsink area, but again I need to build one and evaluate it also in case it limits the 5V amps to much.

The low cost version won't have a 2amp capable 12V switchmode circuit anymore. The new one should still be able to deliver enough for stock machines anyway. Likely 200mA at a guess, but need to evaluate it.

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Re: Future PSU designs

Post by exxos »

New EVM to play with, packaging bit OTT though!

Man, the chip is like 0805 resistor size and 6 pins :o

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Re: Future PSU designs

Post by alienkidmj12 »

hey, whats the max wattage output on the current psu, could i drive an additional 5w on top of a board, floppy and storage device ?

actually thinking of putting one of these under the hood, would look cool through the grill.

https://www.ebay.co.uk/itm/152821203924
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Re: Future PSU designs

Post by exxos »

alienkidmj12 wrote: Wed Aug 11, 2021 5:00 pm hey, whats the max wattage output on the current psu, could i drive an additional 5w on top of a board, floppy and storage device ?
https://www.exxosforum.co.uk/forum/viewt ... f=9&t=1245
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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