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  1. (*steve*)

    Making a Pulsing/Fading LED Circuit

    In a real circuit, if this resistance falls to zero (or too close to zero) the 555 will be destroyed.
  2. (*steve*)

    Solution for clearing LED epoxy on emitter?

    I would probably ask Mr Cree what he recommends. Perhaps there is a type of flux or a method of soldering that is more compatible with the plastic. Retrospectively... Polishing may work if it's a surface defect, but not if the flux has impregnated the lens.
  3. (*steve*)

    Making a Pulsing/Fading LED Circuit

    Not that I'm aware of.
  4. (*steve*)

    Making a Pulsing/Fading LED Circuit

    That is generally the appropriate place. Sure. Let me tell you that I'm certain the behaviour will differ depending on whether you have two LEDs in series with one resistor, or two strings (of 1 LED and 1 resistor) placed in parallel. Feel free to experiment and see if one suits you better...
  5. (*steve*)

    Making a Pulsing/Fading LED Circuit

    1/4 watt will be fine. Larger is ok too. Another LED in series with the existing one may work (it may also change the behaviour somewhat). Another alternative is another 150Ω resistor and LED placed in parallel with the existing one. This may also change the timing slightly. Replace the...
  6. (*steve*)

    Nichrome wire help

    The PWM controller is fine if you want to reduce the temperature of the wire and also the total amount of heat.
  7. (*steve*)

    How hot is too hot for LEDs?

    It sounds like perfectly acceptable Chinese engineering. Just be sure not to provide a warranty.
  8. (*steve*)

    Grid Tie Inverters connecting 2x1000w

    How many independent inputs does each inverter have? You can probably get away with placing multiple identical wind turbines on one input, or multiple identical strings of solar panels (with the same orientation). But mixing different things on one input would be bad juju.
  9. (*steve*)

    555 Based Transformer

    Yeah, just use a regular transformer. And place the diode across the transformer rather than across the MOSFET. It will help stop you coupling noise into the power supply.
  10. (*steve*)

    Nichrome wire help

    No. I'd use a pair of pliers. If it's getting too hot then make the wire longer. That will increase the resistance, lower the current, thus the total power (along with the power per unit length) and therefore reduce the temperature. If you need the same amount of heat, but the wire is...
  11. (*steve*)

    Combined buck & boost converter?

    Like with solar panels, an mppt controller is the best solution for getting maximum power from your turbine. Dynamic braking in high winds can be done in several ways. Most simply a dead short can be placed across the output of it is too windy. Other options include feathering the blades, or...
  12. (*steve*)

    Programming c on raspberry pi

    Also note that any compiler you find will probably default to C++
  13. (*steve*)

    Nichrome wire help

    You limit the temperature of the wire simply by making it longer. (Unless you want to make it variable)
  14. (*steve*)

    Reverse Bifilar Coil vs Bucking Coils

    If it was wired such that each part of the bifilar winding was in opposition to the other, then no. For bucking could, the answer is yes. It's no different than any other 2 coils.
  15. (*steve*)

    Reverse Bifilar Coil vs Bucking Coils

    The former would generate very little magnetic field because conductors carrying current in opposing directions are nearly concident. In the latter case, each coil could quite easily generate a substantial magnetic field, it's just that they are of the same magnitude but opposite direction...
  16. (*steve*)

    How hot is too hot for LEDs?

    But, yes, that's too hot. What sorry of current control are you using? You so realise that driving them from a voltage source is a great way to destroy LEDs, right? Go into the resource section and look for out resource showing how to use LEDs if you're not sure about anything.
  17. (*steve*)

    Nichrome wire help

    Having googled for these fuel filter heaters, it appears that they are used in cold weather for diesel vehicles, especially those using biodiesel. I note that one was mentioned to draw 8.5A at 12V, which suggests a total resistance of 1.4 ohms. If your 500mm length of nichrome has a resistance...
  18. (*steve*)

    hello from uk

    Hello and welcome to Electronics Point.
  19. (*steve*)

    Nichrome wire help

    Off topic, but why do you need a mini electric blanket for the fuel filter? I've seen a few people ask about these and I'm not sure why.
  20. (*steve*)

    Solar Panel School Project

    Use your meter on the current range to measure the current supplied by the panel. You will then have 2 measurements, the short circuit current and the open circuit voltage. The maximum power is typically achieved at about 80% to 90% of the short circuit current when the voltage will be between...
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