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  1. (*steve*)

    What is up with this?

    In a post in the homework section, @hevans1944 says: I thought I would follow the advice to the op, but quickly found myself wondering... On the bottom of the first column on page 4, when discussing the choice of mosfet for the circuit in figure 5 in the second column of page 3, they say...
  2. (*steve*)

    Amplifier project

    Are you saying Bob is easy?
  3. (*steve*)

    10k trimmer

    Looks that way. And do you really want a (linear) trimpot as your volume control? Why not a normal (log) potentiometer?
  4. (*steve*)

    Old 1996 issues of Electrical Design News or Electronic Design

    It sounds almost like you're getting evidence of prior art. A quick search of my state library tells me I may have electronic access to Electronic design (0013-4872) from 12/01/1984 to present in Computer Database and General OneFile from 20/01/1997 to 31/12/2011 in ABI/INFORM...
  5. (*steve*)

    Thermal fuse help needed..

    Three times the price of the RS ones, but they are 10A. Note the instructions to crimp them, not solder them. Yes, I probably would.
  6. (*steve*)

    Thermal fuse help needed..

    Try this. Unfortunately you have to buy 10 at a time, but they cost peanuts. You'll have enough for the next 150 years!
  7. (*steve*)

    Thermal fuse help needed..

    You can get a fuse rated for a voltage higher than you expect to see, and for a thermal fuse, any current greater than you need it to pass. The important thing in this case is the temperature. Try to get as close as possible to 140C, and any current >= 2A, voltage >= 32V
  8. (*steve*)

    Beginning electronics, understanding whats actually happening

    Of course (and I think it's been mentioned earlier) it all depends on what you want to learn. "Everything" is pretty much not an option. There's so much that if you waited until you did know everything, you'd never get to do anything. If you're interested in radios, then building a crystal...
  9. (*steve*)

    Pre-Scaling a squarewave. Output weird.

    A simple technique is that if the display looks funny, try triggering on the other signal (also try triggering on falling rather than rising). In this particular case we can see that on a falling edge of the yellow waveform, the blue waveform can have a rising or falling edge. If the scope...
  10. (*steve*)

    3 position sub-mini slide switch

    None of the links really work any more so your going to have to provide your own link to the switch.
  11. (*steve*)

    Where can i buy the mosfets i need for my project?

    I agree. Wherever possible I always try to use schematic symbols showing the body diodes. Even if you intend to wire then up the right way, the easiest drafting error with MOSFETs is to draw them upsidedown. And that's going to confuse or mislead people.
  12. (*steve*)

    Where can i buy the mosfets i need for my project?

    If you are using this arrangement with mosfets that have very low on resistance and a power supply capable of large currents, there is the potential for damaging shoot-through. If you're just using a small 9V battery, you may not even notice anything other than a brief glitch in the voltage.
  13. (*steve*)

    Can anyone identify this component

    I hope you mean there is no conductivity. If there is really no resistance, then you probably have shorted rectifiers.
  14. (*steve*)

    Current passing for regulator IC's

    If you google for "current pass regulator" I believe you get a better quality set of results than if you google for "current amplifying regulator". In fact, if you do it now, you might find an answer to your question in the first couple of hits. :-) But let me assist... We'll start with a...
  15. (*steve*)

    Where can i buy the mosfets i need for my project?

    You don't specify the load, but if it's a hundred mA or so, you can probably get away with some small mosfets in TO-92 packages (similar to the transistors you're likely using). For the N channel, a 2N7000 would work, and for the P channel, a ZVP2106A would probably be fine. A more generic...
  16. (*steve*)

    Can anyone identify this component

    It will make a difference if either of the existing brown wires is common with either of the existing red wires.
  17. (*steve*)

    Can anyone identify this component

    Are either of the red wires connected to either of the brown wires? On the original transformer, if the wires remain in approximately the same position, the two red wires connect to one winding, the two brown ones to the other. If neither of the red wires connect to either of the brown wires...
  18. (*steve*)

    DIY voltage Regulator

    Why do you want to waste 75% of the energy in your battery? A lower voltage battery will be cheaper for the same capacity in Ah, or have a higher capacity at the same price point. Is your device just a small load compared to the main use for the battery (that might justify it) Also LDO has a...
  19. (*steve*)

    Need Advice on this project

    Hang on a second. He's talking absolute position. 1 degree is about 69 miles at the equator. Easy peasy. A GPS can get you within a couple of metres, not so good in the Z axis, but a few tens of metres should be fine. :-D
  20. (*steve*)

    Need Advice on this project

    I hate repeating myself.
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