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  1. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    I don't think the HH-65 would be compatible with the DD-50 even if you used a mono cable, but of course you can try it. In post #5 on this thread, you said that they aren't compatible using a stereo cable. Using a mono cable will short the ring connection to ground at the pedal. It won't do any...
  2. KrisBlueNZ

    Diode I believe?

    I guess the obvious thing to try is a capacitor between the gate and cathode of the SCR. If you're using the beer's conductivity to trigger the SCR, the resistance will be fairly high - at least in the kilohm range, maybe higher. So you'll need to use a small value capacitor, otherwise the...
  3. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    I get "Document not found" on that Yahoo groups link
  4. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    OK, it's probably best to make up a cable and try it. The first cable drawing shows the plug that plugs into the pedal on the left, and the plug that plugs into the DD-50 on the right. The cable has a 1/4" jack plug at each end. If you have an old mono instrument cable, such as a standard...
  5. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    Thanks for the link. According to that service manual, that drum trigger module is compatible with the HH-60 hi-hat pedal, but the HH-65 is not mentioned. Do you know (or can you find out) what differences there are between the two models? The hi-hat pedal socket on that drum trigger module...
  6. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    OK, thanks for that. Unfortunately, the way the pedal is supposed to work is not clear from this drawing. The connection to the rubber part that touches the contacts, if there is any connection to it, is not shown. Can you find a circuit diagram for any Yamaha product that is designed to...
  7. KrisBlueNZ

    convert switching-mode PS to stabilized PS?

    You mean, if you use a switching supply to power a circuit that uses a MOSFET, will it affect the switching of the MOSFET? No; the MOSFET's switching is controlled by its gate-source voltage. The noise and ripple coming from the switching supply is relatively small and is just superimposed on...
  8. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    Yes, that's a good idea. There may not be a PCB, but the service manual, circuit diagram and parts list would be very helpful. Also you asked > Kris, you're very sure that changing the stereo cable that comes with the HH65 > pedal to a mono guitar cable won't make it work with the DD50...
  9. KrisBlueNZ

    Help with inverter

    I've watched the videos. They show that it's possible to convert a DC voltage to a higher DC or AC voltage. This method is used in battery-powered inverters and uninterruptible power supplies. You need to learn some basic physics. Start by learning about voltage, current, resistance, and power...
  10. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    No, there's no MIDI involved. Probably what's needed is a power source and a comparator of some kind, to detect when the pedal pressure is greater than a certain amount. I imagine it would be a box with a socket to connect to the pedal, a socket to connect to the DD-50, and a socket for power...
  11. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    OK thanks for that. I'm sorry to say that the DD-50 cannot support the special features of the HH65 pedal. Each pedal socket only has a single connection to the main processor in the DD-50 and that connection is digital, so the DD-50 cannot respond to the position or pressure of the foot pedal...
  12. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    Thanks for the English Owner's Manual. I'm looking at it now. Re 4shared, I don't know. Try uploading the DD50 Service Manual and post the URL, and I'll have a look.
  13. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    Thanks for the links. The DD50 owner's manual isn't in English. Do you have a link to one that is? I'll preface my comments by saying that my electronic music experience is narrow and out-of-date. I'm trying to help but I may have made some wrong assumptions. Here are three relevant quotes...
  14. KrisBlueNZ

    Reducing voltage

    I would just use a small switching power supply. These are available with a 6V DC output. Look on eBay, you're sure to find something cheap and Chinese there! You might even be able to find one with adjustable output voltage so you could get exactly 6.5V for perfect bulb brightness and colour...
  15. KrisBlueNZ

    Simple way to reduce RPM on this fan?

    Yeah, what CocaCola said :-) A suitable diode would be 1N4001 (or anything from 4001 to 4007). You didn't put your location in your profile (the option is there for a good reason, you know) but assuming you're in America, you can get them from Radio Shack...
  16. KrisBlueNZ

    How can the new Yamaha HH65 Hi-Hat Pedals be modified to work with the Yamaha DD-50?

    Can you at least provide links to the technical data on these products?
  17. KrisBlueNZ

    Voltage Regulator

    John, what do you think about the series R-C from the collector of Q2 to the base of Q1? This is actually positive feedback. I have an idea what it does, but I was hoping someone would know for sure.
  18. KrisBlueNZ

    Please Hep with autobalancing motor project

    OK, thanks for the description and the link. Have you bought the inclinometer yet? It seems very expensive. You can probably get the G sensor IC that's inside it for a fraction of the price. Analog Devices make a range of them; go to http://www.analog.com and look for MEMS accelerometers...
  19. KrisBlueNZ

    Help with inverter

    You can't draw enough power to power a hard disk from a USB port. A standard USB2 port supports up to 5 standard loads of 100 mA each, so the limit is 500 mA maximum, which is 2.5W (P=VI); a typical 3.5" hard disk requires 0.7A at 5V (3.5W) and 0.5A at 12V (6W) so you need 9.5W input power, and...
  20. KrisBlueNZ

    "Mechanical On/electronic off" switch component

    I don't understand your description of your idea. Perhaps you could draw it up and scan the drawing and post it here. I'm also not clear on what you want to do. So you have lockers that can be unlocked electronically (through a solenoid of some kind) but you also need to be able to unlock them...
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