Hello,
in order to reduce cable-mess I thought about getting rid of all the small powersupplies and replace them with one fat PCU.
There are these nice breakout boards available:
(https://www.dropbox.com/s/ec07nbtlbbmhfzl/71tA%2Bv2ZYDL._AC_SL1200kl_.jpg?dl=1)
You think its a good idea? or may characteristics of a switching PSU even harm the old hardware?
Thanks,
Frank
That should be fine as long as you make sure to use the correct fuses (ie: around 3A on the 5V rail and 500mA on the 12V rail). Otherwise, if something goes wrong you'll completely destroy the CPC.
Bryce.
0,5 A for 12 V? Isn't that a bit too small? Measure peak usage of 3" floppy (spin up).
The 12V rail peaks at about 270mA even on an old worn out drive.
Bryce.
Waw, that's pretty low for a floppy drive. I done a bit of research into it when I was making my external 3.5" floppy drive and seen that they were around 700mA peak.
You've made me think that i should possibly fire in an in line fuse though as it's currently being powered via a 2A USB charger.
A 3.5in drive is completely different. It's running completely on 5V. A 3in drive has 5V for the electronics and 12V just for the motors. I tested around 15 3in drives when I was developing my 5VCPC interface and I never found a drive above 300mA.
Looking at that in Watts:
3.5in Drive: 5V x 0.7A = 3.5W
3in Drive: 12V x 0.27A = 3.24W (plus whatever the electronics needs from the 5V rail)
That makes them pretty similar.
Bryce.
Ah! the power of Math!
yeah, that makes sense now.