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  1. (*steve*)

    Wireless ECG electrodes

    There is no significant reason why the electrodes need to be physically connected to the device, however they measure small differential voltages, so at the very least they need to be connected to each other.
  2. (*steve*)

    I found a cheap and great way to get rid of Rosin off of a PCB.

    Acetone can dissolve some plastic parts.
  3. (*steve*)

    Choosing resistor value

    No. All of the ports might be outputs, but the current drawn from them might be a fraction of a milliamp.
  4. (*steve*)

    Health Care is so damn expensive...

    Yeah, it's about half (per capita) of the USA.
  5. (*steve*)

    Partialy Discharging Capacitor

    Yeah, now we can see that the gas discharge tube and capacitor (C7) short out the SCR, allowing it to turn off. So the sequence is: Place a voltage on the gate of the SCR sufficient to turn it on. Trigger the main flash tube. Remove the SCR gate voltage. Start timing... At conclusion of...
  6. (*steve*)

    Woo-Woo Small Generator Homemade, Created In Educational Purpose Lighting E 27 230 V Led Bulb

    And we look forward to any actual measurements to show why such an approach has any benefits over traditional approaches.
  7. (*steve*)

    Choosing resistor value

    No resistor is required. You must design your system to keep within the budget. It's a bit like the maximum load rating for a truck. You don't ask what cost per pound you need to charge to avoid overloading the truck, you weigh the boxes and make sure the total weight is ok.
  8. (*steve*)

    Health Care is so damn expensive...

    Fortunately my country's health system means that's not going to be something I'm going to have to face -- even if I lose my job and can't afford health insurance.
  9. (*steve*)

    Partialy Discharging Capacitor

    It is simply a timing circuit which turns on a very small and wimpy scr.
  10. (*steve*)

    Boosting transformer current output

    Or problems may be due to how you rectify and filter the AC. These questions are answered by a good schematic. If you don't want to help us by answering our questions, then I'll go back to my first answer, get a bigger transformer. Don't tell anyone I said so, but I might even go so far as to...
  11. (*steve*)

    Health Care is so damn expensive...

    One of the major problems of Australia's scheme of partially socialized health Care is the enormous cost to the taxpayer. It is simply scandalous that our government, the people we trust to spend our tax dollars, pays, per capital, half of what the US government does. I find it hard to argue...
  12. (*steve*)

    Blue Wire Laptop Charger.. Help!

    Which current is to high? 2A to 3A to a laptop while charging it's battery seems reasonable. With the boost converter that could easily be 3A to 4A or even higher. If you remove the laptop's battery the current may be lower.
  13. (*steve*)

    Partialy Discharging Capacitor

    Even with those links, the circuit does not seem complete.
  14. (*steve*)

    Boosting transformer current output

    I think we need to see the circuit. Something sounds fishy
  15. (*steve*)

    Partialy Discharging Capacitor

    Because you need one, and also a method of stopping the flash. That circuit controls the timing, that's all. Without the other two parts it's about as useful as a soluble fish.
  16. (*steve*)

    Partialy Discharging Capacitor

    There is no trigger in that circuit. You'll need to post the entire circuit diagram. That circuit simply provides a variable delay that is partially controlled by the incident light.
  17. (*steve*)

    Boosting transformer current output

    Well, another method is to unwind the secondary, counting the number of windings, then unwind the primary, counting the windings, Now pick a larger size wire for each, capable of carrying the larger current (i.e. twice the cross sectional area for twice the current) Now take a look at the...
  18. (*steve*)

    Boosting transformer current output

    Sure, get another transformer rated for the required current.
  19. (*steve*)

    Working of a JK Flip-Flop. Help needed with the circuit.

    It could have something to do with the fact that you mentioned it in your first post (and that I missed it) A clock pulse is a logic signal which goes from one state to the other, then back again. The edges are fast and it has a duration at least "long enough" for the device bring triggered...
  20. (*steve*)

    Solar panel no amperage

    If you get 12V and 0.125A as the open circuit voltage and the short circuit current then the panel is probably capable of 12*0.125*0.9*0.8 = 1.1W (because the max power is typically near 90% of the Isc and 80% of Voc)
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