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  1. kellys_eye

    Series Resistor in Place of Line Distribution Transformer

    HA!
  2. kellys_eye

    LED Photoelectric switch

    Post #7 seems to be from an AI - ignore it. The brightness could be an issue for you. LEDs don't respond well to having their brightness changed by using a simple resistor. Most variable brightness (for LEDs) is achieved using PWM - pulse width modulation - which adds complexity to your...
  3. kellys_eye

    Series Resistor in Place of Line Distribution Transformer

    What are you smoking?
  4. kellys_eye

    Part identification help?

    Not a fan of IP cameras (or wifi versions for that matter). Give me AHD (over coax or twisted pair) any day! I recently got hold of a couple of older PTZ CCTV units and a couple of spare CCTV camera modules to play with. One of the CCTV PTZ units has an unusual - in my experience - worm/gear...
  5. kellys_eye

    Part identification help?

    I'd guess it would take around 3 hours to fix and the usual rates of $75/hr (and that's CHEAP) make it's 'worth' (to you) 'worthless'. Sorry, but that's the way the world works these days. If you can correctly and accurately describe the actual fault symptoms we may be able to offer some...
  6. kellys_eye

    With a Little Help from my friends?

    Nice article but I suggest it might not be that easy to source the three-section RF chokes..... could be the 'killer' as far as constructing that version. Plenty of other versions in your other link of course.
  7. kellys_eye

    Part identification help?

    Not an easy task and more often than not so complicated (and therefore expensive) that most don't bother. They are now 'too cheap' to be worth it. That said, the only real way of tackling it is with some sophisticated test and repair equipment. Start by identifying the main ICs on the boards...
  8. kellys_eye

    DLN-4SE Multiprotocol Master and Slave Adapter help

    There is no specific requirement to use LabView. The documentation advises of use with MS Windows and Linux. https://dlnware.com/user/Software-Examples
  9. kellys_eye

    Series Resistor in Place of Line Distribution Transformer

    No, that part won't work. The purpose of the LINE output is to develop a high voltage to overcome the relatively high cable resistance between amplifier and speaker. For a PA system with speakers located many hundreds of feet away, the resistance of the cable would be a significant part of the...
  10. kellys_eye

    With a Little Help from my friends?

    L1 has a value of 0.5mH and can be made yourself or easily bought. It's value isn't that important. What you need are two oscillators of the same value and the 'value' is set by the LC (inductor/capacitance) values. The antenna can be anything. Usually it's a telescopic antenna of 18-36...
  11. kellys_eye

    Stuck! I changed the belt on the dymo disc painter and put it back together, it turns on but won’t move

    In the picture with the black square (in yellow circle)..... the threaded rod must screw into that part. Did you screw it in enough? Maybe a few more turns on it so a bit more of the screwed shaft is visible is needed? Either way, such mechanisms have to detect where the platter is located...
  12. kellys_eye

    Series Resistor in Place of Line Distribution Transformer

    Instead of getting high voltage/low current 'transformed' into low voltage higher current (using the correct impedance matching transformer) you will get low voltage at even lower current if you use a series resistor into a low ohm speaker. It'll sound crap.
  13. kellys_eye

    Stuck! I changed the belt on the dymo disc painter and put it back together, it turns on but won’t move

    The 'thing' circled in yellow is the 'bracket' that is attached to the 'screw thread' which pulls the drawer shut via the stepper motor at the end of the screw shaft. Check the connector to that motor (with the red, black, brown and yellow wires) is inserted correctly. Sounds like you have the...
  14. kellys_eye

    Stuck! I changed the belt on the dymo disc painter and put it back together, it turns on but won’t move

    The drawer may have 'ejected' a little too far. With the power on, give the draw a firm push to see if it starts moving.
  15. kellys_eye

    LED Update from thread posted in 2007

    That's a real weird value. Sure it wasn't 2400 baud? Mind you, given the application I think it wouldn't really make much difference. I only make this comment as 2600 is not a 'standard' as far as data transfer is concerned. 2400 baud is.
  16. kellys_eye

    LED Photoelectric switch

    Purchase a cheap garden LED ornament (solar powered) that has all the parts, including the battery, for a dollar or so. You can't buy the individual parts for anywhere near this bargain price.
  17. kellys_eye

    LED driver help

    Clearly it can't. Without making actual measurements we can only make assumptions. Assuming the PSU is rated correctly then the LEDs are, individually, rated at 0.25W, not the 1 watt stated elsewhere. This 0.25W figure is still rather high for a standard LED where 50mA (at any voltage between...
  18. kellys_eye

    resistor confussion

    What else constitutes the circuit? Is this a resistor on its own (i.e. the 5V 2A supply connected across it) or is the applied voltage/current passing through it to 'something else? You can apply 1,000,000V and 1,000,000 amps to a 0.1W resistor provided there's nothing connected to the other...
  19. kellys_eye

    Is Armoured and Un armoured cable same ?

    An 'understanding' barrier too. Armoured cable consists of (multiple) cores carrying the signal or power surrounded by a protective covering of high tensile steel wires that give a physical protective barrier to penetration. When correctly installed, the armour wire is bonded to the cable...
  20. kellys_eye

    Is There a problem, or is it just the case that the motor needed a load.

    The inertia of the flywheel I suspect. Try it again without the flywheel and see what it does.
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