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  1. poor mystic

    PWM

    Is the project to make lights controllable by sound volume? oops a "post crash"... Your ball, Gryd
  2. poor mystic

    Has anyone experienced different colour room lighting, if so which colour did you prefer?

    spratly chicken. think yr' wise? I'm 58, sonny. colours still pretty strong around here. anyway, Dark Side... what kind of cookies?
  3. poor mystic

    Wiring 100 speakers together, help!

    So, Sara from Bob's post, we can see some solutions. You could put 10 strings of 5 in series and the resulting impedance will be 4Ω which is still OK with your amp. Here, 5 speakers, each 8Ω, are put in series to make a 40Ω resistance. Then, 10 sets of 5 series speakers are put in parallel. We...
  4. poor mystic

    Wiring 100 speakers together, help!

    I just had a long lesson with the OP who now understands series/ parallel resistances! (A pity we can't do "chats" through the forum. Chats with image sending capabilities would be goooooooooooooooooooooooooooooooooooooooooooooooooooooooooooood)
  5. poor mystic

    Need a super simple 3v DC timer circuit

    :) OK, but that need not be subtracted from the supply voltage. The full supply voltage is still available to the load, with a MOSFET. With a bipolar transistor, 0.6V is taken up by the base-emitter junction, which reduces the voltage available o drive the load. Also, the statement that a...
  6. poor mystic

    Need a super simple 3v DC timer circuit

    Possibly a MOSFET would be a good choice of buffer. MOSFET's have an advantage, at low voltages, over bipolar transistors - there is no 0.6V bandgap to use up your operating voltage ceiling. Here's a link http://www.electronics-tutorials.ws/transistor/tran_6.html
  7. poor mystic

    What is this Blue Component?

    The component is a transformer. Do you have a photograph of the damage?
  8. poor mystic

    Wiring 100 speakers together, help!

    :) Because 100 is not a power of 2, with 100 speakers, you cannot get all the speakers to carry the same power. For completely even performance across all the speakers, you could use 64 or 128 speakers. Then the series parallel system would work a little better. Did you see what was meant by...
  9. poor mystic

    Need a super simple 3v DC timer circuit

    Hi You can get CMOS 555's which run as low as 1.5V. Google "CMOS 555" and you'll see... the part number is LMC555
  10. poor mystic

    Minimum test equipment

    I think you'll find a modern scope, secondhand, at about 1/2 the price of new. There won't be any problems with it - ask on the site before you buy is a good option.
  11. poor mystic

    Looking for a transformer. wonder if anyone could help

    Hi :) If you look around your town, you'll probably find a motor and transformer rewinder who'll be able to manufacture to your specs.
  12. poor mystic

    Villex Passive guitar booster

    Hi :) I think the Varitone probably is very similar. I found this thread http://music-electronics-forum.com/t20308/ which discusses someone's attempts to make their own Varitone.
  13. poor mystic

    Davenns' 1000th post

    Ooh it's been a long time! Only 7 to go now Dave I'll provide the cake and beer images, after all it's my party...
  14. poor mystic

    When should you buffer a signal?

    :) Yes, that's the idea. The next stage is a VCO - a voltage controlled oscillator, which is controlled by voltage. Let's call the voltage Vc. Ideally, a voltage-controlled circuit samples a voltage without changing it. This is difficult with transistor technology, but easy with op-amps. The...
  15. poor mystic

    Soldering Wires

    Hi Steve You don't think he'd be better to use a pair of PCB relays, say, to try and fool the camera that nothing's changed? I wonder what the camera will do, with a continuous half-press. Mark
  16. poor mystic

    Electronic repair !

    :) Hi Do you mean this http://www.ntcp.com/contents/en-us/p893.html What is the problem with it?
  17. poor mystic

    60 watts to 50 watts

    Harald is trying to say that the 12V device will only draw the power it "wants". You could use a million watt battery without damaging your 12V device, because it is designed to work with a 12V supply.
  18. poor mystic

    What is the impact of phase adjust potentiometer?

    PCM is my trade; I was originally trained as a telephone technician. I wonder whether Altin wants to build his own PCM system? It doesn't sound impossible. Still, I suspect that it is so very difficult that it might as well be impossible. The manuals for PCM systems commonly take up about 5...
  19. poor mystic

    How do I increase energy flowing into a Capacitor?

    No I can't, I'm sorry. The reason I can't provide a link is that the rumour, that 9V batteries can kill someone this way, turns out to be a myth. I think I need my embarrassed emoji.
  20. poor mystic

    How do I increase energy flowing into a Capacitor?

    I like your go get 'em attitude. I think you need a signal generator, an oscilloscope, a low-voltage, dual tracking power supply, and a few hand tools. An excellent book is still "The Art of Electronics" by Horowitz and Hill. You can learn about transistors, triacs, op-amps, logic circuitry...
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