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Everything posted by indulis

  1. In institutions of higher learning (at least in the States), it would be extremely unusual for an undergraduate degree to require the submittal of a thesis. Now a senior/year end project is a different story, but that not a thesis. From Bertz
  2. Do the math and plot the transfer funtion, then you will know (and should understand) what it does.
  3. If you need/want the mold to cool quickly, you want a material like "ceramic" which has good thermal conductivity, but a low thermal capacity. Basically somethng the conducts heat but won't retain any.
  4. To Hero999's point, the first project (Temp data logger)... It says: Pin 7 in the schematic is hard wired to +5V... how is that going to work?? Or is it just to early in the morning and I need more coffee?
  5. These are both buck converters. First, what do you have for a load? You gotta have one, or else it will pulse skip or just shut down once the 500
  6. VRM's go even higher... ~100A Not really! http://news.thomasnet.com/fullstory/Voltage-Regulator-Module-is-Intel-VRM-11-0-compliant-818760
  7. Look thu some of these... http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM401001
  8. A "filter" with a crystal?? Care to provide an example?
  9. Without the transformer (if it
  10. A 50A shunt @ 50mV is only 2.5W dissipated and something like the AD708 has a 30
  11. What kind of current levels are you talking about here? Is there a reason it has to be a DC clamp-on vs. a shunt resistor?
  12. Yup... it a General Semiconductor (bought by Vishay I think). It could also be a zener or a transient suppressor...
  13. The 741 can't swing to GND, you need a negative supply of a few volts.
  14. Google "transistor bias point"
  15. Like what?? Google is a wonderful search tool... there's lots out there.
  16. That might relate to your problem... more often than not, the regulation (if any) on bipolar supplies is done across both outputs
  17. These are dual supplies... are you using only one side, 15V, or are you running it as a 30V supply? There is a data sheet warning not to exceed 1W
  18. KevinIV, what do you think the advantages are over a genarator that has a field winding??? And after you explain that, explain to everyone what role the strength of the flux field has to do with how much power you can get out of a "genarator".
  19. Definitely not true. Many factors are considered when selecting diodes in DC-DC
  20. An alternator does not have any magnets in it. Google PM motors, altenators and generators (a DC motor run "backwards")... plenty of info on how they work. The field isn't really "rotating", the commutator changes the flux direction on the rotor pole windings to repel against the field windings flux.
  21. That is correct, but that is a minimum... go a bit higher to account for any spikes.
  22. For those kind of current levels, look into "mercury contactors".
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