This power supply was built about 6 months ago.
I connected an ATX breakout from dangerousprototypes to an old ATX power supply to be able to power-on it and have easy access to outputs. I replaced reseteable fuses with bigger ones.
I put cheap amp-meters to be able to measure current in -5V, 3V3, 5V, 12V outputs.
On the right hand-side you can see an adjustable output voltage with selectable current limit I bought on ebay.
And on the left hand-side there is a -48V output provided by a tiny dedicated power supply I put in remaining space inside the box.
If you want more details you can contact me on twitter.
What resettable fuses did you use? 1.2A is a little low imo, I was hoping 3A but the 3A ones I found have a 50 ohm resistance which is not good for this imo.
I’m thinking separate paths. Most MCU boards will use little power so the basic 1.2A line will be fine, then I might want a separate power path for servos etc. (usually when I pull power from a molex from a PC I use 1.1A SMD PTC fuses myself, plus a biggish Schottky.)
Anyway, I am looking at my data sheets, and a leaded MC33163 from Multicomp (via Farnell) with a 3A hold current is specified as 0.02ohm to 0.08ohm. How did you manage 50ohm?
I want to know more about this project it looks awesome.
Looks great. Tell me more…
Hello,
This power supply was built about 6 months ago.
I connected an ATX breakout from dangerousprototypes to an old ATX power supply to be able to power-on it and have easy access to outputs. I replaced reseteable fuses with bigger ones.
I put cheap amp-meters to be able to measure current in -5V, 3V3, 5V, 12V outputs.
On the right hand-side you can see an adjustable output voltage with selectable current limit I bought on ebay.
And on the left hand-side there is a -48V output provided by a tiny dedicated power supply I put in remaining space inside the box.
If you want more details you can contact me on twitter.
Another also very cool:
https://hackaday.io/project/5287-atx-benchtop-power-supply-refined
Sorry, outputs are -12V, 3V3, 5V and 12V
What resettable fuses did you use? 1.2A is a little low imo, I was hoping 3A but the 3A ones I found have a 50 ohm resistance which is not good for this imo.
I’m thinking separate paths. Most MCU boards will use little power so the basic 1.2A line will be fine, then I might want a separate power path for servos etc. (usually when I pull power from a molex from a PC I use 1.1A SMD PTC fuses myself, plus a biggish Schottky.)
Anyway, I am looking at my data sheets, and a leaded MC33163 from Multicomp (via Farnell) with a 3A hold current is specified as 0.02ohm to 0.08ohm. How did you manage 50ohm?