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Thoughts about this possible alternative internal colecovision PSU

colecovision internal psu

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#1 omf OFFLINE  

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Posted Tue Apr 25, 2017 4:04 PM

so i have been thinking about this and was looking as one does, and i came across this on ebay

 

http://www.ebay.co.u...pUAAOSweW5VeVqx

 

I did try and do something similar with a hefty heatsink and a load of voltage regulators and capacitors once but I got some image distortion during my tests so abandoned that idea, what I want to know if anyone can help is would this deliver power clean enough to run a Colecovision without any image distortion

 

it maybe worth getting one just to try at that price but wanted to see what others thought first



#2 omf OFFLINE  

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Posted Wed May 3, 2017 4:49 PM

i posted this in the hardware forum but it was moved here to be more on topic to see if anyone could help.

 

so what do you guys think??



#3 chart45 OFFLINE  

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Posted Wed May 3, 2017 6:14 PM

i posted this in the hardware forum but it was moved here to be more on topic to see if anyone could help.
 
so what do you guys think??


i use cfm40t it can be fit in the coleco and give you all the power you need +12 +5 -5 so you still can connect the roller controller behind the coleco

#4 Bmack36 OFFLINE  

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Posted Wed May 3, 2017 9:20 PM

It isn't an internal mod, but something I have been working on. It runs on a stock cv with no mods and just uses an off the shelf 12V power supply.

 

20170503_223341.jpg



#5 omf OFFLINE  

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Posted Sun May 7, 2017 3:25 AM

i use cfm40t it can be fit in the coleco and give you all the power you need +12 +5 -5 so you still can connect the roller controller behind the coleco

thanks for the part number, it gives me a place to start for a working power supply

i looked on ebay at http://www.ebay.co.uk/itm/Very-Handy-3-voltage-Poject-Power-Supply-Mains-input-with-12v-5v-3-3v-Output-/322479449518?hash=item4b1545e5ae:g:casAAOSwknJXyuj7 but this seems to be a variant of cfm40t, this is CFM40T-07 which doesnt have the -5 volts which isnt a major issue i suppose, it is the only one that appear after putting in cfm40t.

 

it looks a bit big for what is needed



#6 chart45 OFFLINE  

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Posted Sun May 7, 2017 4:25 AM

thanks for the part number, it gives me a place to start for a working power supply
i looked on ebay at http://www.ebay.co.uk/itm/Very-Handy-3-voltage-Poject-Power-Supply-Mains-input-with-12v-5v-3-3v-Output-/322479449518?hash=item4b1545e5ae:g:casAAOSwknJXyuj7 but this seems to be a variant of cfm40t, this is CFM40T-07 which doesnt have the -5 volts which isnt a major issue i suppose, it is the only one that appear after putting in cfm40t.
 
it looks a bit big for what is needed


the -5v is for the vram if you use a f18a or had the vram mod you don need it... you can find the cfm40t here http://ca.mouser.com...2BO67El0yNmhQ==

#7 omf OFFLINE  

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Posted Mon May 15, 2017 1:00 AM

ok i picked up one of these power supplies i mentioned in post one during a much larger ebay parts order.

 

it works a treat.

 

it outputs 5v only so it only appears to work if you have a F18a installed

 

does anyone know the power requirements of the SGM, will that work on 5V only?


Edited by omf, Mon May 15, 2017 1:00 AM.


#8 SiLic0ne t0aD85 OFFLINE  

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Posted Sat May 20, 2017 11:32 AM

You can use 5v with SGM, thats how my console is set up right now and everything works fine.





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