Simple data logger that stores electrical data (voltage, current, power, energy, etc.) in an SD card, with timestamp for later analysis.
Project in progress by Javi D'Ambra
Connect a rotary dial telephone from the 80s to a cheap cellphone with an Arduino.
Project showcase by Jeremie
This project is for making a 32-band audio (music) frequency spectrum analyzer / visualizer using Arduino.
Project showcase by Shajeeb
Get the speed of your die-cast toy car!
Project showcase by NerdFatherRJ
very nice project, I love this kind of thing, when adults and kids both learn a lot.
I'm pretty sure that the problem with fast cars are all those serial and LCD prints in the if's.
try once you detect the first sensor trig, do nothing until you detect the second (put a timeout just in case) the do all the math...
in my project, nothing similar to your description occurs.
It is possible that your problem is related with some particularity of the NodeMCU, I really don't know. sorry
thanks for your words, but certainly it's is far away of my possibilities and expertise. Beside that, manufacturing and exporting electronic device from this part of the world (Argentina, South America) is economically inconvenient.
You could buy a better one in openenergymonitor.org
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