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I’m a motorcycle builder by trade. So i have been using a “good old” multimeter to measure voltage, resistance, and current. A multimeter have been a good tool to have when building the electrical system for a custom motorcycle.
But. I got a Mooshimeter so i could display the measurements on a wall mounted Android Tablet “from everywhere” in the shop. A brilliant solution in many ways. But switching from a “normal” multimeter to a Mooshimeter raises a couple of questions for a novice like me, and hopefully someone will be nice enough to spare some time and knowledge.
1. Using “diode voltage drop”. Shouldn’t that be working for LED’s? Having a ~2V LED (that works), the leads connected to “common” and “ohm”, and the app switched to “diode drop”. But only receive “out of range” regardless of what probe is connected to the anode and the cathode.
2. What’s the difference between “voltage (ac|dc)”, and “auxiliary voltage (ac|dc)? Or in other words, what does the “auxiliary” do that the “normal” does not do?
Hoping that someone will help with these, what i would assume is simple questions :-)
Hi Kyrre,
Thanks again for your help finding app bugs over email.
1. Using “diode voltage drop”. Shouldn’t that be working for LED’s? Having a ~2V LED (that works), the leads connected to “common” and “ohm”, and the app switched to “diode drop”. But only receive “out of range” regardless of what probe is connected to the anode and the cathode.
The maximum voltage the Mooshimeter can put out on the Aux port is about 1.8V. This is just a quirk of the design due to the fact that I designed it as a voltage and current monitor first, and tacked on the resistance measurement/diode drop features afterwards. So it’ll work for silicon and schottky diodes but higher bandgap materials will give you “out of range” as you saw.
2. What’s the difference between “voltage (ac|dc)”, and “auxiliary voltage (ac|dc)? Or in other words, what does the “auxiliary” do that the “normal” does not do?
The Auxiliary port (marked Ω) is almost directly connected to the ADC, while the high voltage port (marked V) goes through a substantial voltage divider. This gives the auxiliary port much higher resolution (should be precise to sub-microvolt) at the cost of reduced range (don’t put more than +-1.2V on that port).
Hope this helps explain
~JamesRegarding the bugs, only happy to help.
Regarding your answer. Made perfectly sense the second i read it. Thank you for taking the time to explain.
