Changes by last author:
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| Finally I've made it to create my page in here |
| Please see OscilloScope (can save a few days in the next years to come for only 20..50 EUR) |
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* '''Measure the DC "mean" voltage of the signal (with DVM, ignition on)
** measure the AC voltage of the signal (with DVM, roadspeed > 5km/h get someone to help, take care) |
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* Measure the DC "mean" voltage of the signal (with DVM, ignition on) WRITE THE RESULT HERE
** measure the AC voltage of the signal (with DVM, roadspeed > 5km/h get someone to help, take care). WRITE THE RESULT HERE ** Notice that even the most basic measurements (above) are not done, or not written here, If instructions are simply neglected, it is impossible to help. |
| * maybe, start with the above. Notice that even the most basic measurements (above) are not done, or not written there, If instructions are simply neglected, it is impossible to help. |
| Results are when and if the converter is working, it's working just fine, with the /8 I needed a little adjustment in the link ecu settings and voila my speed was there. After my first 2-3km driving around, it stopped. So you say I guess wiring issue..but same time once it's working and next moment it's not. Even tried a 2nd sensor, same results, even ordered a 2nd adapter again same results. On the 2nd order received there were 3 triplets of resistors, 470, 2k7 and 4.7 if I remember correctly,so where shall I test/install these? |
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Results are when and if the converter is working, it's working just fine, with the /8 I needed a little adjustment in the link ecu settings and voila my speed was there. After my first 2-3km driving around, it stopped. So you say I guess wiring issue..but same time once it's working and next moment it's not. Even tried a 2nd sensor, same results, even ordered a 2nd adapter again same results.
* On the 2nd order received there were 3 triplets of resistors, 470, 2k7 and 4.7 if I remember correctly,so where shall I test/install these? ** See GenBoard/VrInputWithHallSensor (this was sent in private message, please carefully read the messages sent to you. Unfortunately the "question" in the first 5 email requests did NOT include any useful information about the environment, so it is most likely NOT applicable if -8V is not available easily in the actual environment.) |
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Can you resolder/reheat the soldering on the PCB (not many pins, luckily), just in case ? * it is either voltage bias/threshold problem, or contact / soldering problem, but impossible to know because we don't see your basic voltage measurements (related to the setup). |
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Again PLEASE don't start asking me about the wiring, I've tested it with a MAX9926 circuit and working just fine every time, using it two days in a row not a single problem anywhere. I need the VEMS one and ordered it for it's divby steps because my ecu can handle up to 500hz signal and MAX circuit which doesn't offer divby options has already 1000hz at 70kph. If someone can point me how to use only the 4024 part of the VEMS, it's fine for me although the MAX one is a bulk pcb, so I keep on struggling to make the vems one working ok, having it in its connectors-casings!
Ive also tried to set it to the most sensitive mode with the solderblob on the first two points with the >=150mv threshold, no luck too. I can't figure out what more to try, can you please help to get to the bottom of it as it drives me crazy? How is it possible to "squeeze" something by hand and have it working great like this until you leave it? Is ther something wrong with the ground? |
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Again PLEASE don't start asking me about the wiring, I've tested it with a MAX9926 circuit and working just fine every time, using it two days in a row not a single problem anywhere. I need the VEMS one and ordered it for it's divby steps because my ecu can handle up to 500hz signal and MAX circuit which doesn't offer divby options has already 1000hz at 70kph. If someone can point me how to use only the 4024 part of the VEMS, it's fine for me although the MAX one is a bulk pcb, so I keep on struggling to make the vems one working ok, having it in its connectors-casings!
Ive also tried to set it to the most sensitive mode with the solderblob on the first two points with the >=150mv threshold, no luck too. * again, see the measurements above ** I can't figure out what more to try ** read again, carefully Can you please help to get to the bottom of it as it drives me crazy? How is it possible to "squeeze" something by hand and have it working great like this until you leave it? Is there something wrong with the ground? |
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The 1:1 output on the vems one is directly from the lm1815 just to give it a try tomorrow?
What does anyine need to measure so as to help? Thanks for your time |
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* The 1:1 output on the vems VR-HALL adapter is directly from the lm1815 just to give it a try tomorrow? ** Yes, short pulse. ** Too bad you forgot to detail your setup in the first 2 orders and 5+ mails, we could have sent you HC4024 PCB for your experiments (without LM1815) for no extra charge. But "detaching" LM1815 output (cutting trace) so HC4024 clock is fed from external signal is easy. What does anyone need to measure so as to help? See top of the page: The DC mean voltage, and the min/max voltages |