Hello, I have searched for this for hours but every post ends up leading down the path of “if you try this instead”, or “This might work better for you”.
I have a small stand built to break in new go kart and mini bike engines. I need a RELIABLE tachometer to do this and I’m wanting to make the switch to an inductive clamp.
I first used an optical sensor. Very fast, but had issues at high speeds with high vibration and it wasn’t quickly adapted from one engine to another, I often had to make several changes.
Now I use a hall effect type sensor to read the teeth on a sprocket. The problem is that when seeing over 2000 teeth/second, the readings become erradic. Also, when changing engines I often have to relocate the sensor and it takes some effort to get it within proximity for reliable readings. Sometimes this also means changing sprockets, so I have to change the count in the code with nearly every new engine, etc.
With an inductive clamp, I simply clip it around the spark plug wire and let it go. I will make a toggle switch for either 2 stroke or 4 stroke, but within their particular categories, I won’t need to make ANY changes to read the RPM other than simply clipping on the inductive clamp.
I’m wanting to use something like this, which is made to plug into either an automotive multi-meter or oscilloscope. It should never see more than 100 pulses/second, which is GREAT compared to 2000/second with a sprocket.
I cannot find any wiring diagrams for this type of clamp. There are several ready made clamp/module combos used for measuring AC current from places like RFRobot, but I believe this is a DC discharge and I’m not sure on the compatibility.
Can anyone offer any help?