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  1. (*steve*)

    How many watts solar panel to power this Fan?

    Try it. See if the motor starts. There are small extraction fans designed for cars that operate from a small solar panel. They may not shift enough air, but they might be worth looking into.
  2. (*steve*)

    solar panel reverse polarity protection issue

    Many grid connect inverters have a diode across the input to effectively short out the panels if you connect them on reverse. If you do this, you need to be aware that you should not try to disconnect the panels until night falls...
  3. (*steve*)

    Winco generator not producing electricity

    Excellent. This technique was suggested to someone with a similar problem. I remembered your thread, but thought it and the other one were the same. Glad you found the information and thanks for reporting the success of it.
  4. (*steve*)

    Buck convertors

    By pm If the efficiency is 100%, yes the input current would be 1A. Power out = efficiency x power in. Vout x Iout = efficiency x Vin x Iin
  5. (*steve*)

    Parallel and series generator and batteries

    Two more generators
  6. (*steve*)

    MOSFET and Switching power loss for H Bridge motor driver

    That is exactly it.
  7. (*steve*)

    Ceiling fan blades wont spin freely

    bearings
  8. (*steve*)

    TTP223 touch sensors self-triggering bug

    I'm not going to sign up to dropbox to view your video. Upload it to youtube or similar.
  9. (*steve*)

    MOSFET and Switching power loss for H Bridge motor driver

    You could increase the voltage from 5V to 50V. That would allow you to operate at 300Hz instead of 30Hz.
  10. (*steve*)

    MOSFET and Switching power loss for H Bridge motor driver

    Yes. Ignoring the resistance for a moment, the effect of the inductance is to limit di/dt. The current week ramp up and down. With a constant voltage applied, the maximum current will be inversely related to frequency. With a series resistance, the peak current is still inversely related...
  11. (*steve*)

    MOSFET and Switching power loss for H Bridge motor driver

    No, it's the inductance. You will probably see a smooth variation of current with frequency
  12. (*steve*)

    PCB game board repair - Dark Tower 1981 - Ti TL496CP chip does not have 9v out

    It all depends on how the circuit is wired up. You need a schematic of the actual circuit to give a definite answer. However it is very unlikely that the chip would be powered all the time (which would be required to have 9V present at all times) ad it would drain the batteries for no good reason.
  13. (*steve*)

    PCB game board repair - Dark Tower 1981 - Ti TL496CP chip does not have 9v out

    It may be easier to remove the 3V to 9V circuit and power the device from (say) 6 AA cells in series. I believe those TL496 chips get instantly destroyed by reverse voltage, and I'm not sure how well they handle overload. There are cheap boost converters on ebay that can do this more robustly...
  14. (*steve*)

    Hello, Welcome! (Introduce yourself)

    Hi and welcome to Electronics Point. Depending on what you know already, you may be in for a steep learning curve, but lets see if we can help you up it.
  15. (*steve*)

    Parallel and series generator and batteries

    I would recommend that you isolate the two generators from each other with diodes.
  16. (*steve*)

    Mysterious PSU Chip - please help!

    So did you have the multimeter set to a voltage or current range? And what prompted you to "test" this power supply. As far as I can tell right now, what you are seeing could be as a result of the power supply protecting itself. Measure the output on a voltage range and tell us what you get.
  17. (*steve*)

    Relay switching

    As they were before. This is just a gate driver. You could also (probably) get away using a BJT to switch the relay. See the resource on switching loads with transistors.
  18. (*steve*)

    Relay switching

    yes.
  19. (*steve*)

    Relay switching

    That circuit is designed to drive the gate of the mosfet if 3v3 is insufficient to turn it on. You probably don't have to go to all that effort, but I had the circuit handy.
  20. (*steve*)

    Relay switching

    I doubt that very much Here is an updated link. It's written in Chinglish, but one of the photos clearly shows the transistor and several other assorted components.
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