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  1. S

    Broken Beats Mixr Headphones..

    Still can't see what you're talking about. It SOUNDS like one of the contact pads that you want to solder to is missing. Can you use a very short piece of spare wire to make the solder connection, and then epoxy it in place? Is your soldering iron capable of accepting finer tips made for your...
  2. S

    Reversed Junction Capacitance in High Frequency

    Is this theory, or a practical application. The capacitace will change with frequency.
  3. S

    transmission distance in radio communication

    I'm kind of assuming this is an inside your home device? A liitle more specific information would help. Are you working a signal device like an on-off switch, or a communications device, like your own short-range FM radio station?
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    Looking for a component marked "made in Austria"

    Arnold was made in Austria. Just put a micro-picture of him on the part.
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    External bell

    I don't know the systems available outside the U.S. I also don't know if this is for home use, or an industrial site. I wanted a remote annunciator and light for home use, so I'd know when the phone was ringing in one room, while I was on the other side of the house. There were plenty of hobby...
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    Windows vs. Apple

    I'm not much of a computer person. The big difference I HEAR about, which may or may not be the current buzz, is that: Windows is much more popular, and therefore a bigger target for hackers to try to screw with. Apple users are devout, and the ones I talk to claim that it has less vulnerability...
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    3rd Prong on DC supply and electrostatic table conundrum?

    From what you told us, just make sure the replacement power supply is wired-in the same as the original. If it's a ground connection on the new supply, the wire to the DC ground plane sounds right. I was just letting you know that your electostatic table is going to run off HV AC, and a...
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    What happens when an AC powered floor-fan dies?

    Yeah, it's like KrisBlueNZ and dude said. It's improbable your PC took a hit from this. Most of them are designed to withstand small voltages spikes, if it ever even saw one. I'm sure the flickering lights in your dwelling excited whoever saw it happen, but your PC was unimpressed. If this...
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    What happens when an AC powered floor-fan dies?

    Considering the symptoms of the fan itself, I would think any thermal cut-off protection would not have done it's job (if it had any). You probably burned through the laquer on the motor windings, shorting them at some point. I'd discard the fan. Even if the possible thermal protection...
  10. S

    Security System

    As far as I know, security systems, to be secure, are proprietary to their manufacturer. I'd Google information on a security system that encompasses your requirement for inductive proximity sensors.
  11. S

    Weird circuit wires on wireless headphone

    The thin green and red, laquer-coated wires are the speaker wires. They seem to be connected correctly. Are they the only two wires that were disconnected in this unexpected disconnect? The laquer appears to be cracking, leaving the potential open that they could short-out one another. Can you...
  12. S

    Electronic kits

    Check www.ramseyelectronics.com. They have a UK division if you're there. Google 'ramsey kits'.
  13. S

    3rd Prong on DC supply and electrostatic table conundrum?

    I work pretty regularly on old Hewlett Packard x-y table plotter type recorders. The electrostatic table has it's own separate power circuit, it uses 400VAC to energize the table. That's not going to have anything to do with your 24VDC issue. It will be it's own High Voltage circuit. Your...
  14. S

    Weird circuit wires on wireless headphone

    Well, what happened? Did your unit just stop working, or did you yank some wires off their contacts that you don't know how to reconnect?
  15. S

    Broken Beats Mixr Headphones..

    The string is with the wires to provide strength, flexibility, and strain relief. If you just had thin wires in headphone cables, you'd snap the wires just turning your head. The coating is a laquer. It's easier to apply and cheaper than using a regular plastic insulation on the wires. The...
  16. S

    Broken Beats Mixr Headphones..

    Yes, you can resolder the connections to get your headphones working again. It takes a bit of skill to solder without over-heating he plastic parts around the electrical connections. Any wire of roughly the same wire diameter will work, but you want something multi-stranded, so it's flexible. If...
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    Problem in a circuit?

    What KrisBlueNZ said. It sounds to me like you're dealing with a 'crowbar' circuit. It's designed to limit (effectively reduce the output voltage) if an overload condition exists. The crowbar circuit itself can fail, resulting in a continuous limit of the power supply output that otherwise...
  18. S

    Why am I able to use a dc wall wart instead of an ac one to charge my lawn mower?

    Another clear and concise explanation that makes the mysterious into something simple that anyone can understand. Good answer for someone who didn't really understand why wall adapters are labelled ac or dc.
  19. S

    help with a flyback

    Try your own idea. Google Van De Graff generators, you'll probably get a lot of hits on home-made circuits for them. Parts lists and all. (But like dude said, them high voltages are nasty to work with. So watch yourself)
  20. S

    I have no idea

    I know what you're saying. Glad to hear that device only comes out of the bag at some dedicated site. My point is, that I used to deploy those things; and if a cop or neighbor recognizes it out of the bag, I don't care where it's at, things can turn bad for you badly, very quickly. Good luck...
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