17 Feb
2006
17 Feb
'06
1:25 p.m.
Basically:
1.67 Amps X 24 Volts = 40 Watts. (I*E=P)
40 Watts - 18 Watts = 22 Watts of remaining capacity.
You need 5 Volts at 5 Watts, which is the same as 5 Volts at 1 Amp. A
series pass regulator delivering 5 Volts at 1 Amp from a 24 volt source
will waste 19 Watts of heat. (24V - 5V = 19V; 19V X 1 Amp = 19 Watts)
19 Watts + 5 Watts = 24 Watts required. Not Quite enough!
Your rated power requirements may be absolute maximums. Your drive may
actually use less than rated, so it *could* work, but a separate supply
would be best.
-Bryan
Chris M wrote:
I'm guessing so. Am wondering if the 1.67 amp 24
vdc
regulated wall warts from BGMicro are sufficient to
power an 8" floppy drive (NEC FD1165-A). Needs 24 vdc
@ 18 watts. Would love to devise a circuit to get the
5 vdc (@ 5 watts) off the same brick, but that may be
asking too much ;).