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  1. C

    State of Charge LED indicator

    by reducing the input voltage? the only pattern involved is the lights slowly turning on with voltage, if you want a chase pattern extra circuitry is required. ..
  2. C

    Got room for a resistor? :D

    that's a gas pipe lol
  3. C

    Bright LED Recommendations

    350ma 1 watt led's sound ideal then.. you can buy 10 of them of a couple of bucks from ebay...
  4. C

    Got room for a resistor? :D

    A couple of aa's not good enough? :P
  5. C

    Got room for a resistor? :D

    Here catch lol...
  6. C

    State of Charge LED indicator

    the images are circuits? (confused) what about the circuit? (just a circuit?)
  7. C

    State of Charge LED indicator

    if you click on a component you can then change things like wavelength / led color.. but point is, by raising lowering voltage the circuit looks fine.. (but... at 50v you really need to aim to have the LED's current max at 20ma)
  8. C

    State of Charge LED indicator

    I was dreaming away at 5am lol (being in Australia sucks) With every circuit, simply clicking on the resistor then adjusting it's values, but yes that circuit should work fine :)
  9. C

    State of Charge LED indicator

    That's everycircuit for android/ios and chrome for the pc... it's pretty good for a mobile phone :)
  10. C

    State of Charge LED indicator

    I just quickly made a rough circuit so please don't assume this will work in real life, but with potentiometers you could use this method....
  11. C

    State of Charge LED indicator

    another option is an opamp (if you can find one for 40v) or comparator but the transistor version is probably cheaper to build....
  12. C

    State of Charge LED indicator

    measure the resistor that's in series with the led, at that voltage i'd expect it to be between 1 - 2k? the voltage comes from a voltage divider say 10k and 100k that small amount of current providing it's > 0.6v on the base pin... it'll make the transistor begin conduct between the collector...
  13. C

    5 Ways to Harness Free Energy

    http://www.futurity.org/plug-in-to-a-low-voltage-tree/ people are using plants to produce voltage (side effect from photosynthesis) place plants in row create a battery ... i'd trickle charge batteries with something like a joule thief but more efficient .. (about as free as you get)
  14. C

    State of Charge LED indicator

    to be honest, that side of the pcb shows mainly resistors and transistors... it's as simple as voltage dividing and if it reaches 0.6v on the base of that particular divider, the transistor conducts turning on one led ...
  15. C

    Current Measurement Rating

    I bet a lot of "experienced" electronics guys have been hit with high voltage a few times in their life :)
  16. C

    Resistor help

    Ebay's pretty reliable and more often than not cheaper (but there are exceptions)
  17. C

    the concept about to basic electronics.I need basic concept of subject electronics

    when Electrons flow , we have electricity...
  18. C

    Current Measurement Rating

    Current is what causes the fuse to blow, simply heat melts the fuse... for example to blow a 1amp fuse, you could use 1 aa battery and short it and blow it... but you could equally use 1000v but only 1ma and while very deadly, that fuse should not blow... amps x volts = watts Total power is...
  19. C

    My free Apps on google playstore

    hah! sorry for missing your post spent the last two days tracking down a very annoying bug.. this walky talky uses udp, but due to how the jvm works when you close the server socket, it actually keeps on listening! causing two sockets to open and a runtime error...
  20. C

    My free Apps on google playstore

    a crate of beer instead lol...
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