Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: MICR0
  • Order by date
  1. MICR0

    Hall effect speed sensor question

    I guess "input" should be V+ or Vcc? Terminology across disciplines can cause confusion, and I'm certainly up on electronics terms as I should be. I should brush up. I calculated the 20ohm value from the source voltage (5v) minus the the voltage drop across the sensor from memory of read a...
  2. MICR0

    Hall effect speed sensor question

    The 20 ohm is on the input as a limiting resister. I got the 20 ohm value from the source voltage and from what I think I read somewhere is the voltage drop across the sensor. That's the way my very hazy memory told me to do it. The 0V is connected through the ECU sensor ground. The ECU is also...
  3. MICR0

    Hall effect speed sensor question

    I have a Cherry GS1005 Hall effect sensor that I'm trying to use as a cam position sensor. It should be triggering off a tab on the cam sprocket but I'm getting no signal on my scope. I have verified the 5V Vcc is there, and I have a 1K pull up resister between Vcc and the signal out (as per...
  4. MICR0

    VR Crank Sensor Question

    I have a VR type crank sensor and I'm not sure how to wire it to the harness. Its a Bosch sensor typical on Mercedes cars. I assume one side is ground reference from the ECU then the output or signal is wired back to the appropriate input of the ECU. I don't know the polarity of this sensor. How...
  5. MICR0

    Online Shape Library?

    Does anyone have any links to online shape libraries? I've recently found myself looking for quite a number of shapes that aren't in the base install.
  6. MICR0

    Whats the Pefered Method to Wire for Voltage Dist?

    FWIW this is a complete prototype application so there is no existing harness and I'm building one from scratch (fun). I've decided to distribute power, and likewise provide a reference ground, by wiring everything to a terminal block wired just off the ecu. This should make the wires to each...
  7. MICR0

    Whats the Pefered Method to Wire for Voltage Dist?

    I have a new ECU that I'm wiring to an engine with a significant number of sensors. Each 3 wire) sensor needs to be supplied with a 5v signal from the ECU. Since I cant wire them all individually in to the one output pin of the ECU, what would be the simplest method for connecting them all? I'm...
  8. MICR0

    Program for Laying out Schematic

    Visio turned out to be great, thanks
  9. MICR0

    Smart CDI Cam Question

    I recently spoke to someone that suggested that the ECU is looking at the spaces between the timing pulses coming off the flywheel. It’s able to “see” the deceleration of pulses as the pistons are on their compression strokes and can recognize the pattern. I guess with sample rate and processor...
  10. MICR0

    Program for Laying out Schematic

    What would be a good program for laying out an automotive electrical schematic? A schematic similar to the one you'd find in a service manual? Easy to learn The simpler the better. thanks
  11. MICR0

    Smart CDI Cam Question

    I’ve recently started a project for an experimental vehicle based around a Mercedes/Smart 800cc CDI diesel engine. I’m working first on getting the motor running with an aftermarket ECU but am having a tough time figuring out how the cam position is sensed by the ECU. There seems to be no sensor...

Part and Inventory Search