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  1. Alec_t

    High RPM Slip Ring Recommendation

    o_O Isn't the rotor a permanent magnet type?
  2. Alec_t

    Differential Pressure Sensing

    What pressure values are you trying to measure? If one port is open to atmospheric pressure, then the pressure measurement for the other port will be relative to atmospheric.
  3. Alec_t

    Garment Steamer

    As the TCO is knackered anyway, can you try dissolving the lime scale (with vinegar or lemon juice) to get a better view of the markings?
  4. Alec_t

    Garment Steamer

    Unless anyone here owns or is familiar with that particular steamer we can only estimate the TCO temperature specification. I sincerely doubt the heater element itself would be damaged if run at temperatures well above 100C, but the plastic parts supporting it or close to it would be at risk of...
  5. Alec_t

    What do I need?

    One thing you need to be aware of when you have your shiny new oscilloscope: the 'ground' probe and the 'scope chassis are by default connected together and via the mains lead to mains ground. This can cause problems when you are trying to measure mains-related voltages in a DUT. The cure is to...
  6. Alec_t

    Differential Pressure Sensing

    In principle, yes, but a lot would depend on the sensor characteristics. For example, if each sensor had a full-scale range of 10 bar and you were trying to sense a differential pressure of 2 or 3 bar it should be possible; but if the differential pressure of interest were only 2 or 3 millibar...
  7. Alec_t

    Mobility scooter power module won't charge

    Sounds likely, if the secondary voltage is now WAY too high.
  8. Alec_t

    using a counter cd4516 in ltspice to count the number of ramp down period

    Q1 to Q4 provide a binary output. Or do you mean something which displays a numerical value? If the latter, perhaps use a behavioual voltage source to give a voltage proportional to the binary value. Welcome to EP!
  9. Alec_t

    Oscillator

    Here you go :
  10. Alec_t

    Trouble with obtaining reliable values of the current from the photodiode.

    Welcome to EP! The links to the sandiego site are broken.
  11. Alec_t

    Help with a "simple" 555 circuit

    I've posted a suggested basis for a delayed pulse circuit for this over on AAC.
  12. Alec_t

    Help with a "simple" 555 circuit

    Welcome to EP! Are you saying that the modes toggle, i.e. one press gives A-to-B and the next press gives B-to-A and so on? Which circuit?
  13. Alec_t

    150 VDC Power Supply T/S issues

    It's possible the grime on the board is providing an unwanted leakage current path to account for the board misbehaving.
  14. Alec_t

    Coil can be replaced by Inductor for a bridge rectifier?

    It's only an hour or so's work for all 100. Can't you do that yourself?
  15. Alec_t

    Garment Steamer

    If you undo the two screws holding the stat, are there any markings on its hidden face?
  16. Alec_t

    SPICE alive

    Bear in mind that Spice is quite happy to let the (simulated) smoke out. By default it ignores component maximum ratings so, for example, will allow your little 1N4148 diode to pass 10 million Amps without batting an eyelid. You need your wits about you when using Spice, but its an invaluable tool.
  17. Alec_t

    Soil moisture sensor

    You could try carbon rods (from old zinc battery cells) as electrodes.
  18. Alec_t

    150 VDC Power Supply T/S issues

    We seem to be missing some of the schematic. What connects as inputs/outputs to all those terminals? Where does the pot connect? I see various test points 'TP'. Do you have info as to what voltages/waveforms should be present at each? Are all the TP values what they should be? At which point are...
  19. Alec_t

    Hello All,

    Welcome to EP!
  20. Alec_t

    Garment Steamer

    Since the heater element obviously needs to rise above 100C to produce steam, but should cut out not much above that, I would guess a thermostat rated for a temperature in the 110C-150C range would be used there. Are there no markings in or on the plastic moulding of the stat to give a clue?
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