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  1. B

    Retractable Roof for Swimming Pool

    Gate motor is fixed at one end and has a gear which locates in a rack mounted on the moving section. Rack would only need to be on panel one, the other would free wheel so to speak. Many micros have the wireless units as part of the micro. Arduino rf_nano being one. You have a LOT of systems to...
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    555 Trigger

    Listing says continuous piezo sound alarm........:) 3.6Khz. Would be better with an alternate on/off though all the same.
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    IR sensor OR something else?

    You would need to focus or rather restrict the field of view of the ir sensor. I am guessing if there is no powder, there will be a shiny surface inside the bullet casing to reflect the light back. Coversely, if there is powder, the back of the powder would null this return but only if the ir...
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    555 Trigger

    https://www.ebay.com.au/itm/154724945331
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    Retractable Roof for Swimming Pool

    All sound feasible although you may run into some teething troubles during construction and testing. You could for example, run a 12v supply from one battery to a down converter to say 9V and then feed the raw terminal of the micro. This could help isolate the noise from the motors. Micro could...
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    VFD voltage

    Why not put it on the input side?
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    how do i assemble drill black and decker KFBCD701?

    Retaining screw may well be left hand thread also.
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    Connecting a 8 ohm buzzer with a 555 timer

    Useful piece of post diagnostic info.... not.
  9. B

    Car radio gets only static need help troubleshooting

    like these..... https://www.ebay.com.au/itm/114434705319
  10. B

    Fine movement of 12v motor on pan/tilt head

    Most quality units would use stepper motors so you may be limited if that is the case to the min step of the motor or the driver. Details of the units may reveal more.
  11. B

    Breaker Trips Easily, No New Appliances Added to Circuit

    Best get a qualified electrician in then.
  12. B

    Breaker Trips Easily, No New Appliances Added to Circuit

    Circuit breaker trip as in "overload" or as in "earth leakage".
  13. B

    Safety in situation where Isolation transformer is misused

    Why would that be.....? Sounds like a load of cobblers to me.
  14. B

    220v vs 110v question

    That's it....buy another peeler to suit your voltage...would most likely be much cheaper than a 120VA transformer,
  15. B

    Car radio gets only static need help troubleshooting

    Try another radio. If it does the same that eliminates the radio. One can get an elcheapo multi everything for around AUD$20 these days. Even if a crappy buy, cheap tester.
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    Wiring up a Y90L-2 motor

    No need to go to the expense of c or d curve( they will be enormously expensive anyhow)....circuit wiring will undoubtly handle 25a a curve.( 2.5sq mm?)...some countries require elcb these days as well.
  17. B

    Power supply help for air purifier

    Swapping parts between two units with the same symptoms to me at least, seems crazy to say the least.
  18. B

    Safety in situation where Isolation transformer is misused

    Client is probably trying to cover his butt against any comeback should any of his gear fail. Isolation transformers in the past were in common use in households (usually laundry) and still used in operating theatres. These days earth leakage are the common safety link.(some countries called...
  19. B

    Extending a Christmas LED lighting cable.

    As pointed out earlier, this cabling is main level (rather dangerous LED string actually and banned in Australia) and cannot be cut and joined. Only way to extend is through an extension as already shown by Bertus. Although, even then, if the extension is used outside , it is not waterproof . A...
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    Kawasaki Sax-a-Boom Toy Repair

    I'd say so too given the underside of the board showing the centre and one pin bridged. Bottom right second last photo #6.
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