Search results

Search Forums New Posts
  1. kellys_eye

    How to play Playstation games on real hardware without discs

    Whilst I don't doubt that it could be done the process would seem to be far more expensive (and complicated) to justify - and that's without the massed legal threats from a very well funded manufacturer!
  2. kellys_eye

    Panasonic DMR-E75V VCR/DVD Recorder combo player - Lost power

    The MR1521 is a MOSFET integrated SMPS controller device - now obsolete. The only datasheet I can find is this: https://datasheetspdf.com/pdf-file/624927/ShindengenElectric/MR1521/1 which shows a very basic schematic for its operation: From this we can see that pin 4 is the supply voltage...
  3. kellys_eye

    LED forward voltage and brightness

    in a given direction.....
  4. kellys_eye

    i2c bus

    There are many tutorials on the I2C bus that you could access: ...however the diagrams you posted show how the clock signal (SCL) corresponds to the individual data bits in the data signal (SDA) where the status of SDA is read at the 'top' (flat part) of the clock (SCL) signal. The data could...
  5. kellys_eye

    LED forward voltage and brightness

    The MCD values are usually ignored in the types of application you're using. You (generally) set the current so the LED can be seen under the expected ambient conditions of use - whatever that turns out to be. Same as a car might be able to rev to 6000rpm but you don't go driving with the...
  6. kellys_eye

    i2c bus

    That (poor) image only illustrates the two POSSIBLE states of data - 1 or 0. They don't happen simultaneously.
  7. kellys_eye

    Rpm Problem turntable Sony PS 333 direct drive

    Temporarily disconnect the red and orange wires from the control pot circuit board and measure the resistance between all three points (either end of the pot track to the wiper). Let us know what the results are.
  8. kellys_eye

    Talking robot head

    Connect the bottom end of RV1 to ground.
  9. kellys_eye

    Query on online UPS supply

    WHAT equipment? How is it different from 'other equipment'?
  10. kellys_eye

    How to play Playstation games on real hardware without discs

    If it existed (or was possible) then it would already be happening.
  11. kellys_eye

    KLH R3100 stereo receiver volume won't adjust

    Check on YouTube for videos related to this model. There's at least one that discusses repairs of it.
  12. kellys_eye

    Panasonic DMR-E75V VCR/DVD Recorder combo player - Lost power

    With the board reassembled, apply power and measure the voltage across the +/- terminals of the bridge rectifier. If you get around 150V then measure the voltage across D1 (zener). If that is ok find the device number for the controller IC (IC11150 on the heatsink) and get the datasheet for...
  13. kellys_eye

    Rpm Problem turntable Sony PS 333 direct drive

    I'd try noting the current position of the wiper (look at the orientation of the 'slot' in the metal top part of the preset potentiometers) and give them a twist left and right to 'wipe' the tracks and potentially restore contact - assuming it's been lost due to dirt/corrosion. Set them back to...
  14. kellys_eye

    Rpm Problem turntable Sony PS 333 direct drive

    They are probably too large. Resize them to 800x600 and try again.
  15. kellys_eye

    Tactlle switch

    How did you do this check?
  16. kellys_eye

    query on variable frequency conversion

    You could use a motor-generator set up i.e. a 3-phase 415V motor driving a 3-phase 208V generator (with appropriate gearing to compensate for speed/frequency issues).
  17. kellys_eye

    i need help with my campus assignments

    Using battery power for methods such as you suggest (clothes drying, ironing etc) is not going to work. The energy input required is enormous. A typical drier used in the home may consume some 2kW/hr of energy. This is the equivalent of around 3 to 4 CAR batteries PER HOUR. This is why you...
  18. kellys_eye

    Comedy Thread

    You could substitute that picture for me and I'd still get the joke!
  19. kellys_eye

    Check the phase sequence of 3-phase electricity with multimeter

    The issue really only arises when wiring up motors. The general practice is to wire it up and if the motor spins in the wrong direction, reverse two of the phase wires. Any other application is non-specific in terms of phase.
  20. kellys_eye

    LED lights recommendation for warehouse lighting

    In a commercial setting you have to meet specific luminosity requirements to keep with H&S and given the way LED lighting manufacturers state their light output (lumens, watts, equivalents etc) you will need professional advice on the appropriate units to use. Such parameters vary with area...
Top