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  1. kellys_eye

    Who's right and who's wrong?

    They need to get a room.......
  2. kellys_eye

    Generac Niagara 400 (watt) standby generator

    ??? An 8hp engine is good enough for a 5kW genset - what's it doing powering a 400W jobbie?? Sure the label doesn't say 4000W?
  3. kellys_eye

    Phase voltage Measurement

    The usual method is to rectify the AC to DC and measure that (via attenuators). You could use a transformer for isolation and step it down to something a lot safer, rectify it and measure that.
  4. kellys_eye

    Generac Niagara 400 (watt) standby generator

    400W for $50???? He didn't see you coming - he must have sent for you! Money pit. Don't even go there. Portable (suitcase) inverter generators (with much more stable output very suitable for 'sensitive' electronics) rated at 750W can be bought for $250 new (guessing - it's been a while since...
  5. kellys_eye

    which one is best?

    https://letmegooglethat.com/?q=best+gaming+headset
  6. kellys_eye

    TL401 928 -> TL431

    Why are you replacing it? If you don't know what it is how do you know it's faulty? Post a pic of the device and the surrounding circuit board.
  7. kellys_eye

    What's the best way to manage two different components from a single Button Control ?

    You could use a different 'button' - there are three-position toggle switches available ON-OFF-ON. The switch is, as the logo (left) shows 'off' in its central position and applies power to the device connected to the left side or the right side depending on which way the toggle is moved. The...
  8. kellys_eye

    Radar Sensor PCB repair

    If you had a picture of a 'good' board we could make a better determination. As it stands I suspect that a burned out component is missing from that area of the board. Such damage also tends to 'progress' through the rest of the circuitry so although a repair might be possible, ascertaining...
  9. kellys_eye

    Is this motor driver controller IC capable of reading position info from potentiometer?

    That sticker would indicate (to me) that it required 9V with a minimum supply rate (capability) of 500mA.
  10. kellys_eye

    Is this motor driver controller IC capable of reading position info from potentiometer?

    To a point. As already mentioned, the output of those devices is UNREGULATED therefore tends to higher than the nameplate suggests (the nameplate refers to the voltage expected under the correct load). If an unregulated power unuit is used then some other form of protection/regulation will...
  11. kellys_eye

    Help! Exercise Bike & Elliptical Magnetic Pedal Resistance Controller Circuit Explained

    How do we determine the connections AT THE BOARD? There is nothing to show which colour wire goes to which pin on the board connector (since that ribbon cable has wires all the same colour - except for the 'key' marked one i.e. red stripe). Measure the voltage across pins 2 and 8 of the IC...
  12. kellys_eye

    6-V to 5.2V linear regulator

    ....and just what 'device' is it that's so voltage critical? We need ALL the information to make a reasoned response - if we end up saying 'you don't need anything, just use the 6V' after numerous posts we won't be thanking you for wasting our time.......
  13. kellys_eye

    PS900 Oscilloscope Sweep Function Not Working

    Check for 180V from the power supply section. This powers the horizontal deflection amplifier and seems to be the ONLY thing that isn't working (i.e. you have a spot and vertical movement - this indicates the other supply lines are all present else one or other wouldn't be happening).
  14. kellys_eye

    PS900 Oscilloscope Sweep Function Not Working

    No. It is well within tolerance. If it ain't bust, don't fix it. You have power to the unit so don't mess with the wiring. Have you read the documentation for the 'scope to determine how to set it up and use it? We have to know that there is an actual fault rather than simple 'user error'...
  15. kellys_eye

    Hello all from central texas.

    Hi Richard.... You are very welcome(d)! Please share!
  16. kellys_eye

    still suffering with a bridge rectifier overheating

    From what I can see: pin #4 (brown wire) is regulated DC from the LM317 device pin #5 (black wire) is approximately 30V DC (low current, unregulated) pin #6 (blue wire) is common (i.e. 0V where you should place the negative lead of your meter) pin #7 (violet wire) is +32V DC unregulated Use...
  17. kellys_eye

    Help! Exercise Bike & Elliptical Magnetic Pedal Resistance Controller Circuit Explained

    Clean the potentiometer track (squirt contact cleaner in or use a syringe and get some petroleum jelly in there). If the system has a servo motor that isn't 'tracking' properly then you either have a bad drive to the motor or a bad feedback to the controller. Since the motor actually moves I'd...
  18. kellys_eye

    Is this motor driver controller IC capable of reading position info from potentiometer?

    No circuit that uses digital electronics will operate without using a stabilised (regulated) voltage source. If the immediate supply is via a wall wart then that voltage will be regulated by some onboard circuitry to keep it within the required logic levels used (5V, 3.3V, whatever). The...
  19. kellys_eye

    Is this motor driver controller IC capable of reading position info from potentiometer?

    Not sure what you mean by that statement. The two chips you reference have no capability to 'read position information'. In your example (the bike?) the position is fed back as a voltage (from a potentiometer physically connected to the motor output) and will be sensed by the controlling...
  20. kellys_eye

    Diode help and general question

    When? If the sunlight varies, so does the output voltage.
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