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  1. kellys_eye

    Dishwasher board burned

    The burned area is the power supply for the board. It's extensive damage that most likely isn't readily repaired other than by replacement. A 'hardened' i.e. experienced tech might give it a go but there looks to be some actual physical damage to the board as well as the components. Check for...
  2. kellys_eye

    Is it possible to use LM2596 buck converter to a 24V dc battery and connect it to a 12Vdc/220Vac inverter to supply raspberry pi 4B?

    The LM2596 MAXIMUM output is 3A - too narrow a margin to be used for a Raspi. Simplest and easiest method would be to purchase a buck converter (ready-made) to deliver 5V at 5A and use the 24V source to power it.
  3. kellys_eye

    Video card EVGA GT 640 the component marked is exactly SOT-363 ?

    Components that 'melt' rarely do so without causing other issues elsewhere. Regardless, unless you can identify the component part number you will have to 'guess' what it is. Your 'professional' should be able to do that for you - ask them. There are literally HUNDREDS of components in the...
  4. kellys_eye

    How to use DC power supply to power AC powered appliances?

    What an utter crock of doo dah's..... seriously, you should leave the technical stuff to people who know about it - stop guessing or worse, fabricating 'theory'. You are WRONG.
  5. kellys_eye

    How to use DC power supply to power AC powered appliances?

    I'm not sure why you consider AC 'detrimental to your health' but, for ANY device that is a simple resistive load (any heater basically) you can operate them on DC as well as AC. There is no power saving though, the power used is the same in both cases.
  6. kellys_eye

    Pyle Pro PTA1400

    Check the connections from the circuit board to the speaker output terminals. I suspect a loose connection at the circuit board - around the main output capacitor(s).
  7. kellys_eye

    Video card EVGA GT 640 the component marked is exactly SOT-363 ?

    HOW was it analysed? It's unusual for only one part to go dud. If the 'analysis' was simply seeing the part was damaged this isn't a good enough reason to suspect ONLY that part as the faulty one. SOT-363 is the component package SHAPE and not an actual part number - which is normally 'coded'...
  8. kellys_eye

    How to make a spark gap with a diode (almost)

    Such a person would (I expect) be happy (grateful even) to take advice and any help when offered. The OP doesn't do this - at all. The OP consistently refuses to acknowledge practical theory but instead offers fabricated garbage no matter how often we correct them or advise them to read on the...
  9. kellys_eye

    Fuses for a jacobs ladder?

    A perfect recipe for suicide. The secondary voltages of a microwave transformer means instant death.
  10. kellys_eye

    How to make a spark gap with a diode (almost)

    When do we start accepting the fact that the OP is trolling us?
  11. kellys_eye

    Using an Antique Rheostat to Send a 0 - 3.3V Signal

    Point C connects to 0V Point D connects to 3.3V Point A connects your Adafruit Analogue input port (your choice depending on the coding used). Point B is irrelevant - doesn't need to be connected.
  12. kellys_eye

    Hoping to ID this connector for LED array power supply

    Don't think I've ever seen an application for the S-video connection used! I know I've had equipment with the facility but the S-video has always been seen (used) as an 'add-on' rather than a useful requirement. No surprise that they re-purpose the older plug arrangement for power - at least...
  13. kellys_eye

    15kDCV low current power supply?

    In it's simplest possible form you could use an astable circuit driving the secondary of a small mains transformer (or a 7555 CMOS-device driving an audio push-pull output transformer or even a hand-wound ferrite transformer) and connect the primary output to a string of multipliers...
  14. kellys_eye

    digital pid temperature controller

    Really depends on what the heating application is. PID is overkill for anything that has 'mass'.
  15. kellys_eye

    Oven Control PCB developed by China Vendor

    Analogue PSUs are easier to design, less susceptible to faults, less noisy (electrically) and can be cheaper under some circumstances (low power applications). They are also, imho, a safer solution. A fuse protects the line chord, not the equipment. No fuse in existence will save an...
  16. kellys_eye

    My son's toy car exhaust sound :)

    The only way to get a realistic effect is to use a VCF (voltage controlled filter) to replicate the way an engine sounds under load/acceleration/coasting etc. Digital reproduction of the actual engine noise is fairly easy but the realism takes time/trouble to achieve. Fun fact - around 30...
  17. kellys_eye

    Studiomaster Mixdown Classic 8 Console Problem

    answer
  18. kellys_eye

    PIONEER CDJ MK 800

    If the LCD works 'partly' then it's quite likely due to the connections on the LCD itself - they go from the glass display to the circuit board via something called a ZEBRA STRIP which is a long strip of vertical conductors, each separated from the other by 'rubber' insulation. This strip has...
  19. kellys_eye

    Does anyone know the pneumatic equivalent of an electrical capacitor?

    Air valves. Air flows in - is stored - air flows out. <edited> I said 'one way valves'.....d'uh..... it's air!
  20. kellys_eye

    PIONEER CDJ MK 800

    Post the schematics please.
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