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  1. (*steve*)

    Hello, can somebody help wich transistor is like bfg520

    @michael1978, arguing with yourself is a bad sign.
  2. (*steve*)

    Building a circuit [Variac]

    Whilst I wouldn't recommend a variac (mostly because of the additional exposed mains wiring), there are ways it can be kinda safe, but I wouldn't do it the way you've suggested. My first option would be to find a plugpack that has a switched variable output voltage. This keeps you well away...
  3. (*steve*)

    Heatsink Mosfet

    You have a number of options. The simplest is to get a mosfet which is in a plastic TO-220 package, or maybe one with an insulated tab (these details are typically visible on the sellers web sites or can be found from the datasheet. Another option is to use plastic bolts. And finally the...
  4. (*steve*)

    Dissipating energy stored in an inductor

    The main problem is that the lower the total resistance, the longer it will take for the current in the inductor to fall to zero. I guess that simply monitoring the inductor current will tell me when it reaches zero... The secondary consideration is that i will certainly be testing inductors...
  5. (*steve*)

    Dissipating energy stored in an inductor

    I'm toying with designing a device for measuring inductor saturation currents. There's plenty of these on the web, but I have a need to go up to 30A and (at lower currents) up to 1H or thereabouts. At moderate currents and inductances, there's not a lot of problems dissipating the energy...
  6. (*steve*)

    Please excuse total noob query regards seeking storm bad signal effect on sat TV

    I like that.
  7. (*steve*)

    Please excuse total noob query regards seeking storm bad signal effect on sat TV

    I would recommend you find someone who installs satellite TV and ask them. It probably depends on your signal source. With digital transmissions, there is very little range from an almost perfect signal to no signal at all. If your signal source is an antenna, a fixed amount of attenuation...
  8. (*steve*)

    Please excuse total noob query regards seeking storm bad signal effect on sat TV

    You could probably start with a variable attenuator. It may be difficult to find a level of attenuation that doesn't completely cut off the signal unless either the attenuation or the signal strength is varied.
  9. (*steve*)

    I have created a Mathematical Construct that will change the way we do maths !

    Maybe this is the type of math that can get the 99% into the 1%? Mathematically speaking, there are the same number of positive integers as there are positive and negative integers combined (it's the smallest infinity). So removing the negative ones is nothing (I'd be tempted to say you remove...
  10. (*steve*)

    Tektronix TDS540 Oscilloscope

    For future reference, it's worth trying to read the value in circuit before you remove it, just in case it disintegrates (or is further damaged) as you remove it. Now you have removed the resistor, show us the board. It looks like it may be chatted enough to cause problems. Also try to find...
  11. (*steve*)

    Tektronix TDS540 Oscilloscope

    That's what I mean. Use a multimeter.
  12. (*steve*)

    Tektronix TDS540 Oscilloscope

    Are you still able to read the value of that resistor?
  13. (*steve*)

    Transformer primaries 90 degree phase difference

    But in that case you're applying AC, not pulsed DC.
  14. (*steve*)

    3 transistor non-contact mains detector

    Spot the obvious problem. Also... "Charge pump"?!
  15. (*steve*)

    Drone propellor not spinning. motor fine. no voltage

    Please post some photos, of the whole drive, and closeups of the motor, and connections to it.
  16. (*steve*)

    Running house LED lights on AC

    Fortunately we have means of getting 200 watts of heat energy into a room without expending 200W :-)
  17. (*steve*)

    Cant work with ne5534 amp

    The datasheet indicates that this device will not work within specs with a single ended 5V supply. The specs indicate you won't get any output voltage swing. I suggest you try another op amp, one that has rail to rail inputs and outputs and will work from a single ended 5V supply. Maybe that...
  18. (*steve*)

    Cant work with ne5534 amp

    With the same circuit, if you move the orange jumper from pin 6 to pin 3 of the NE5534, what happens?
  19. (*steve*)

    Cant work with ne5534 amp

    I'm going to be brutally honest. I don't currently have the time to be viewing a particular but of a video and comparing it to a poor photograph on an external site. If I remember, I may be able to get back to it in a couple of days. You can really help by posting the images here where I can...
  20. (*steve*)

    Power distribution in a project

    Either should be fine, the voltage drop will be small unless you have a module that draws a huge current (in which case is probably faulty)
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