Where can I find regulators and more?

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Discussion Overview

The discussion revolves around sourcing specific electronic components for building a magnetic levitron, including a 5-volt regulator, a hall sensor, an op-amp, and a P-channel MOSFET. Participants explore the necessity of using exact models and the availability of alternatives.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant inquires about the necessity of using exact component models specified in a circuit scheme for a magnetic levitron project.
  • Another participant suggests that the 78L05 regulator must be used to achieve the required 5 volts, noting that the difference between the 78L05 and 7805 is only in package size.
  • There is a suggestion that the op-amp could be varied, with a mention that the 741 is an older model compared to the 348.
  • A participant asks about the reliability of Mouser as a supplier for the components.
  • Concerns are raised regarding the availability of the IRF4905 MOSFET, with a question about the suitability of the IRF4905LPBF as an alternative and the implications of the LPBF suffix.
  • Another participant provides information about the IRF4905LPBF, including a recommendation to review its datasheet for detailed specifications and understanding.
  • Confirmation is given that Mouser is a reliable site for purchasing parts.

Areas of Agreement / Disagreement

Participants generally agree on the reliability of Mouser as a supplier, but there are differing views on the necessity of using exact models for the components, particularly regarding the op-amp and MOSFET alternatives.

Contextual Notes

Participants express varying levels of familiarity with electronic components, indicating a range of experience in sourcing and selecting parts for projects.

guitarphysics
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I need a 5-volt regulator (78L05), a hall sensor (SS495), an op-amp (LM348), and a P-channel MOSFET (IRF4905)? I need all these things for a magnetic levitron that I'm going to build. Do I have to get those exact models? (They are specified on the website that has the circuit scheme for it http://www.bis0uhr.de/index.htm?htt...sicsforums.com/showthread.php?t=643270&page=3).
Thanks for your help
PS. Just so you know, I'm very new at all of this, so forgive me if all the things I'm asking are really obvious.
 
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hi there :)

the parts should be readily available from places like Mouser, Digikey, Element14 etc

the 78L05 needs to be that else you won't get 5 Volts the difference between 78L05 and 7805 is just the package size

the opamp could probably be varied a bit, the 741 is a very old one now the 348 a bit newer

cheers
Dave
 
Thanks very much, that's exactly the info I needed. Is mouser a reliable site?
 
Also, the IRF4905 isn't available. Would the IRF4905LPBF be OK? What difference does the LPBF make?
 
The part IRF4905LPbF is a HEXFET power mosfet transistor. Download the eleven-page data sheet at:

http://www.alldatasheet.com/datasheet-pdf/pdf/177507/IRF/IRF4905LPBF.html

Your part number suffix is for the TO-262 Package type. For a description of that see page ten of the datasheet.

You should print the complete datasheet and study it carefully. Everything about that part you need to know is there. This helps your understanding and makes it easier in the future while selecting parts for your next projects.

Cheers,
Bobbywhy

edit: Yes, Mouser is a reliable site to buy parts from. It's been around many years!