Using a raspberry pi and a hall effects sensor to capture shaft rpm. this code will give me the rpm. but after a run i need to start over with zero rpm. this couter just keepd adding the rpm every test run My function code counter = flow.get("counter") || 0 counter ++ flow.set("counter, counte…

the engine lets say idles at 2500 rpm. The flywheel will be turning 2500 rpm also That's where i get the start 3000rpm to end 13000rpm So i would think rpms

In that case what we have will not work. Suppose the engine is running at 3000 RPM and you start the counter, but leave the engine at 3000 RPM. In 1 minute the counter will get to 3000 and the function will start timing. Leave the engine at 3000RPM and in another 3 minutes and 20 seconds the coun…

once the engine is at idle say 2500rpm i start the test. engine goes to Full throttle the program starts its counts as the flywheel reaches 3000 counts and runs until we see 13000 rotations. run finished. the run should take less that 10 seconds

I believe the count function is working.

It seem like my hall effects may be counting high (1) and low (0) instead of just counting the high input

[image] dirtydredrt: It seem like my hall effects may be counting high (1) and low (0) instead of just counting the high input Add a Switch node (not a ui_switch) to the GPIO, checking for payload of 1 and sending that to output 1, and ignoring any other values. Then only the high values wil…

great the switch fixed the input I will have to name the dyno Colin

For the gauge replace the function with this, which has an additional output with the total count on it. Join output 2 to the gauge. [{"id":"12c451d2.0c1b5e","type":"function","z":"84405ff5.25fa6","name":"Count Revs","func":"// starts timing when counts reach low threshold\n// when high threshold …

this latest update works. the gauge shows last count until the next run is finished how can we reset the gauge to zero with the clear counter

Small engine dyno need help to reset my counter after run

General

dirtydredrt 29 March 2021 16:13 44

I have added a gauge to the dashboard. count revs
the gauge reads the sensor input. At the end of the test the gauge displays the count revs.
Now when i go to start the next run i need to reset the gauge to zero because the gauge is still displaying the last run.

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Small engine dyno need help to reset my counter after run

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