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  1. WHONOES

    AC Polarity swapping circuit

    What do you actually want to drive with this waveform?
  2. WHONOES

    electronic load

    Hi. Re the scope, I was asking Tasty.
  3. WHONOES

    electronic load

  4. WHONOES

    AC Polarity swapping circuit

    If I understand you requirement, may I suggest you look up *(google) a thyristor bridge.
  5. WHONOES

    Budget solar charger

    You need 4.1V for charging a Lipo cell. No more or disaster looms.
  6. WHONOES

    5 volts 1000 mA from 12 volts

    It is possible to do. I had a quick go on my simulator using as suggested by Harald, a DIY band gap reference. The regulator bit was done with a long tailed pair and other bits with an Nmos device as the pass element. I will say no more.
  7. WHONOES

    Domestic amp keeps blowing 3.5amp fuses

    Old capacitors degrading as you suggest would cause a very noticeable hum from the amplifier. Also, an overvoltage large enough to cause a failure as you suggest would have to be quite substantial and is a very unlikely failure mode in this instance.
  8. WHONOES

    Domestic amp keeps blowing 3.5amp fuses

    Hi. Finally got to see a schematic of the amplifier. The power amp stage is poorly designed. It has no thermal compensation for the output stage which is a sure fire recipe for thermal runaway which is probably what happened to yours. Being dc coupled from front to back, when one of the output...
  9. WHONOES

    electronic load

    Do you have access to an oscilloscope?
  10. WHONOES

    Domestic amp keeps blowing 3.5amp fuses

    I doubt if the earth connections have anything to do with your problem. What we really need is circuit diagram to aid possible diagnosis otherwise it is pretty much an impossible task.
  11. WHONOES

    Domestic amp keeps blowing 3.5amp fuses

    Who makes / made the AR60?
  12. WHONOES

    Charging different types of batteries ?

    Good grief. So much tosh written about lead acid batteries. The voltage of each cell is 2.25V To charge one you will need at least 2.3V per cell. This will provide a trickle / maintenance charge. For a faster charge. you will need 2.35V per cell no higher or else you will boil the electrolyte...
  13. WHONOES

    electronic load

  14. WHONOES

    electronic load

    As already mentioned, you need to INDIVIDUALLY connect all ground connection back to a single point. Failure to do so will inevitably result in catastrophic oscillation. Also, throw away the Fet's you are using and use a single device in a TO227 package which will be capable of much higher...
  15. WHONOES

    INDUCTION LAUNCHER I have all the parts connected and ready, just need to add new SCR/switch et al.

    I suggest you calculate the energy your scr is being asked to cope with.
  16. WHONOES

    electronic load

    That doesn't tell me a lot. Have you daisy chained the grounds or connected them all back individually to one point?
  17. WHONOES

    electronic load

    How are the grounds to the fet and the opamp shared.
  18. WHONOES

    electronic load

    Jus noticed that the LM358 is a dual opamp. If that is indeed what you are using, what are you doing with the unused half?
  19. WHONOES

    electronic load

    What power supply voltage is applied to the opamp?
  20. WHONOES

    Oscillations in the gate signal with IXFN 150N65X2 transistors

    No. Coax will ring like hell unless it is properly terminated which is not practical in your circumstance.
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