Nextion Project - Tachometer for KTM

A tachometer made for a KTM 640 Supermoto, with an Arduino and a 3.2'' Nextion screen.

The signal from the pickup coil is sent to an Arduino digital pin through a Schmitt trigger. The arduino measures the time required for the coil to produce 5 pulses (in us for max precision), and converts it to rpm.
The rpm value is sent to a 3.2" Nextion touch screen, which manages the gauges.

The tacho has 2 KTM inspired backgrounds : light mode and dark mode, available by touching the gauge.
An additional gauge is available by touching the rpm value.

Material:
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* (1x) Arduino Nano
* (1x) 3.2" Nextion Touch Screen
* (1x) LM358 Op amp
* (1x) 5V DC-DC converter
* resistor: (3x) 10 kOhm / (1x) 1 kOhm / (1x) 4.7 kOhm / (1x) 2.7 kOhm
* (1x) BZX85 4.7V Zener diode
* (1x) 1N4148 diode

[BugsWoW]

Hello @3run020, I like gauge at page 2. How you did it? Which component is used to make this horizontal gauge? Can you share HMI file, please?

[Andre-ctss]

Really well done man! I'd want to make something similar for the bike I am building.. Is this one of the latest versions of nextion display (the intelligent)? I got an enhanced but I struggle to have it smooth on rpm gauge even on testbench using a potentiometer to simulate signal..

[bitelaserkhalif]

Does anybody tried this with ckp sensor instead (hall effect)? My bike uses integrated motor assist starter

[apollorobb]

Id like to have the .HMI file for this if you dont mind i have another idea for a different gauge using it Thanks

[wiwatsri]

Can you show (Inverting Schmitt Trigger Calculator) parameter for calculator this circuit. please teach me calculator this circuit LM358 input.

[lxplayer]

Hi, can you send me the wiring diagram? i trying replicate your project, on 2 stroke engine

[vinniethapower]

its great....except for the RPM value... you can hear clearly you idle, below 1000RPMs and its showing almost double! other than that, great project!