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  1. Doug020668

    Turbo rotational speed sensor/meter

    Hmmmm, another suggestion I could make is a proximity sensor near the blades on the inlet side of the compressor. Such things are being used on speedo sensors over output shaft gears instead of driven hall-effect sensors.These things seems to be capable of 1300 pulses per minute or better...
  2. Doug020668

    Turbo rotational speed sensor/meter

    You could still use a hall effect sensor with a stationary magnet located near the compressor blades, as long as the blades were constructed of a suitably magnetically conductive material.
  3. Doug020668

    How do I create a voltage drop?

    Hmmmm, sounds like you may have a problem that you may be disguising by trying to artificially force the voltage down. Why do you believe you need to drop the voltage. if the voltage is that high in the 1st place, maybe you need to find the cause of the problem. Or, are you trying to modify...
  4. Doug020668

    Oxygen sensors

    The requirement is to have two sensors these days so as to comply with emissions regulations etc. The system that uses 2 sensors is known as On Board Diagnostics II (OBDII) The upstream one is monitoring the exhaust and providing the necessary info for the ECU to adjust the Air/Fuel Ratio, the...
  5. Doug020668

    Alternator Test

    Data I cant help you with right now, but I will probably find out in due course. Bench testing is something you can do simply enough, but actual field testing for vibration, durability etc is something that specialist labs can do, or you may find groups such as SAE(USA) & IAME (Aust) may be able...
  6. Doug020668

    Continous Solenoid: Normally ON vs Normally OFF?

    You can actually buy Isolator solenoids in 12v & 24v to do this job. They draw little current and will handle 800-1000A easily. Isuzu & nissan trucks do it, most jap earthmoving gear does it, and Ambulances in Western Australia use the 12V ones as a means of linking the main and auxillary...
  7. Doug020668

    Headlight wiring voltage drop

    Tony, 0.5 volt drop is excessive. New vehicles may have neglible drop in the wiring, switches & connectors etc, but as they undergo ageing, the situation worsens. I would go the whole hog in this one, upgrade the wiring to the lights, fit circuit breakers & relays, renew the head lamp plugs, and...

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