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  1. kellys_eye

    Bench Test Fire Briggs Mower Ignition Magneto ??

    Apply a pulse to a coil held close to the laminations of the magneto. What the 'coil' consists of will have to be determined by trial and error but considering the magnetic field from the rotor is quite substantial you might be needing a coil similar to a typical 12V solenoid. The coil from a...
  2. kellys_eye

    D&B Audioteknik D12 - Power supply relay issue

    Do you know what the relay actually does? Is it part of the PSU or the anti-thump (at switch-on)? Either way there's an overload potentially a short - somewhere.
  3. kellys_eye

    Pioneer vsx-d710S

    Well..... people who offer the bare minimum information get the bare minimum response! I (we) could 'bang on' for paragraph after paragraph only to find the OP hadn't bothered to plug it in.
  4. kellys_eye

    Lighting for street sign

    LOL - sorry. Don't know what made me do that (other than age)! Problem wit individual output settings is that it's almost impossible to set them they don't eventually go out of sync and overlap. The way to go would be to use one output to drive a relay with c/o contacts and connect the two...
  5. kellys_eye

    Lighting for street sign

    Great link Edd (but are the outputs synchronised???)
  6. kellys_eye

    Pioneer vsx-d710S

    Get it fixed
  7. kellys_eye

    Slow down AC fan speed

    OK, I misinterpreted that - sorry. But my offered solutions still apply and I'd like to know if there is anything about the solution that doesn't meet with your needs. If you want to deliberately complicate matters (install, design or build an interface that does 'whatever') then I'm sure we...
  8. kellys_eye

    Help with 12v fan system

    Given the controller only supports a maximum of 10W (direct drive) you will have to buffer the PWM signal. This is easily achieved with MOSFETs where you apply the PWM signal to the gate of the MOSFET and use the source/drain circuit to control the load - which can be 'anything' depending on...
  9. kellys_eye

    Noise and Glitches

    Research 'decoupling' (in respect to capacitors, primarily, inductors secondarily). This is why in many digital aplications the pcb is often 'crowded' with decoupling capacitors (one per chip in many examples!) and similar capacitors are wired directly across the motor terminals. In...
  10. kellys_eye

    rotate encoder volume problem

    Perfectly. Isolate the three traces coming from the rotary encoder then hard-wire the connections according to the 'correct' pin-out. If the old rotary encoder is only suffering from on on-off problem (push-to-select) then bend back the four locating tabs on the bottom of it to expose the...
  11. kellys_eye

    Slow down AC fan speed

    Without going back and quoting your first post your concern seemed to be for the wasted power (that a dropper resistor would create). You also mention the use of a pure sinewave inverter for the sensitive electronics you want to use. If you use a triac motor speed controller you're introducing...
  12. kellys_eye

    Slow down AC fan speed

    You discount my suggestion too quickly. If you are concerned for power consumption maybe it's time to look for a more efficient fan? One with better control as standard? Maybe even multiple fans (ex PC fans for example) that could run directly from 12V and thus bypass the need for running an...
  13. kellys_eye

    Slow down AC fan speed

    One that includes BUYING A DIFFERENT fan........
  14. kellys_eye

    Laptop power supply's capacitor burnout

    Put simply, the circuitry will 'see' the supply as switching on (when the voltage rises to the correct level for proper operation) and then off (as it falls back below the correct operating level) at the speed of your AC supply frequency. Circuitry needs a STEADY and CONSTANT voltage to work.
  15. kellys_eye

    AKAI Model SS 800 W

    Not enough information. As above, find and post the relevant schematic. Post larger and detailed pictures of the WHOLE board, both sides. The board looks like it's already had some repair work done on it. Was this you? Was it working when you bought/received it?
  16. kellys_eye

    MY SUPER OLD SCHOOL 35MM MOVIE CAMERA NEEDS HELP!

    Don't wish to be a downer but if you don't have the technical manual to tell you which pin does what and the signal levels they should have then you're on a hiding to nothing. But if you DO have the manual - you seem confident of your assessment of the parts and operation so far - then it would...
  17. kellys_eye

    Marvel Under Counter Ice Machine

    The implication of any energy storage (battery, super-E etc) is that there is something 'volatile' somewhere that requires support during power-outage. Even if it's only an RTC. I would also concur with the need to check interboard comms.
  18. kellys_eye

    120V AC inverter with 40V battery

    Every additional stage of conversion you might add only decreases the efficiency of the overall system. Not to mention the additional cost. I doubt a system intended for a 48V input will work with only 40V (it will report a 'low input' error). Of course, putting another converter in (to take...
  19. kellys_eye

    120V AC inverter with 40V battery

    Where did you get a 40V battery? That's definitely 'non-standard'. How is it made up? Individual lower voltage cells? If so then rewiring the cells to a lower, more practical voltage, would be the way to go.
  20. kellys_eye

    Power on a different board vs same board

    On a design basis, no, it's a good idea. Power supplies are the #1 source of problems in any equipment and the ability to separate them from the rest of the circuitry can make servicing a lot easier. In some cases it can remove 'noise' from delicate electronics i.e. where physical separation...
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