Arduino tachometer ignition coil Aug 27, 2018 · I use an Arduino to read the frequency of the negative terminal or tachometer terminal on your ignition coil. I was planning to use an optocoupler in a simple way (see schematics below), but I came across other schematics using another optocoupler, diode and adding a capacitor. Try using a toroidal core to pass the ignition lead through and winding the pick up coil on the toroid, this is how the professional test gear do it. So first here is the circuit diagram: Basically a single wire is coiled around the spark plug lead with one end open and the other one to the base of a transistor (2N3904) to form a Aug 18, 2020 · How are you connected to the coil to get the tach signal? You might consider winding a wire around the coil wire as a tap, to get the signal then send it through a signal processing circuit to clean it up before trying to count pulses. It is designed to incorporate a potentiometer for variable spark frequency (delay period between firing . I've come to realize that this product is a current sensor that works off induction. Opto Coupler will be LTV817, D1 is Zener diode 5. This can be used on any spark-ignited two-stroke or four-stroke engine on a gasoline car, truck, motorcycle, ATV or lawnmower engine. This is done using a high impedance voltage divider with 100k ohms of Some cars have a tach pickup off the distributor (or ignition module) that would give you a TTL level signal that may interface directly to an Arduino. On the So I am wanting to get a signal from my ignition coils for an arduino/raspberry pi tachometer project. I have an UNO that I'm using to simulate the PWM signal into the tachometer input pin of the Mini. Do You think it will work? Regards Dec 17, 2023 · Hello, I'm interested in creating a datalogging tachometer for a carburated V8 engine. The signal then connects to the interrupt pin on the Arduino and the ground of the Arduino is connected to the negative battery terminal of the car. In addition I do not pretend to be particularly knowledgeable about automotive technology or electronics. Oct 27, 2020 · Hello Guys, I want to make a Tachometer to count the RPM of my car with an Arduino Board and OLED Display, My car is 26 years old and it has no ECU or OBD connector, so I'm looking to get the RPM signal from the ignition… May 30, 2019 · The idea is to use the signal from the negative side of the ignition coil. They are ground, backlight and a third line that I call Signal. Bike has TCI ignition. The tach connects to a three wire connector. But this motorcycle HAS a tachometer. I have found similar posts on this forum and Aug 27, 2015 · The Flameduino is set to drive an ignition coil or coil-pack (coil on plug) for achieving sparks at defined intervals and a set dwell. Using this method the tachometer works flawlessly. Oct 14, 2024 · Hi everyone, I have made some progress since my last post: Tachometer from a car ignition coil (already 3 years have passed) I have finally found a working circuit. Timing Light and Tachometer With Arduino: I created this automotive timing light to check and adjust the ignition timing. It's using a Mini Pro 5v 16mhz, serial seven segment display and a 24 Neopixel ring. I'd like to see if I can use the signal sent to the tach for my purpose. I'd like to use coil negative side (signal) to measure RPM. What I'm trying to do is to get the signal from the primary ignition … Mar 24, 2016 · I've been working on a tachometer project with a friend of mine for some time now. 1V, D2 is 1n4007, R1 and C1 works as low pass filter with 338Hz cut-off frequency. I have using the kill switch to get the signal not the coil wire. This engine uses a HEI (High Energy Ignition) distibutor) not "points". I'm doing mainly the same, I'm using a darlington network to adapt 12V signal from car to 5V signal in Arduino. I tried to create a tachometer for my motorcycle using an Arduino Uno. But now I need your help to "debounce" it. I read somewhere that you can get cleaner Jan 24, 2008 · I was wanting to measure engine rpm by sensing when the coil is triggered. The thing though is that the datasheet is showing maximum voltages much lower than what a coil wire would carry (30KV vs 2 Mar 22, 2017 · I want to read RPM of a running motorcycle using Arduino. Its a single coil system, with power to the coil at all times (with the key on) and to trigger the coil it is earthed. I am going to use the pulses coming from the primary side of the ignition coil. For reference its a naturally aspirated chevy 454 thats in a 1979 one ton chevy (K30). I am trying to measure the voltage of the ignition coil (stepped down to not destroy the Arduino). The issue I'm having is that at low rpms (~1200 and below), the signal gets a bit noisy as shown by the two extra spikes following the main spike. I've been doing some research on how to read RPM from the spark plug wires; and for Coil on plug cars, from the coil pack wires. There are several threads here that show how to do this by watching the signal from an ignition coil. Once I get on the throttle, those extra spikes go away and my arduino reads the frequency very well. This can then be used to ignite things (like grills) or, if put in a vehicle's exhaust, a flamethrower. I am trying to determine the time between two explosions (one ignition coil high voltage). Some cars have a cam or crank sensor you could tap into and measure with your Arduino. So, to measure rpm I could detect when the coil is earthed, but how can I do this? I would need to protect the Arduino from voltage spikes etc, a optoisolator? Or I could take a signal from the rev Sep 30, 2017 · Hello guys, It's me again. It's nice and smooth when I turn the pot to increase the frequency. I connected the Feb 14, 2013 · On car engine the tachometer signal is simply from the coil driver, on the negative pole of the coil (a coil is driven by negative). Oct 1, 2020 · Hi everyone, I'm actually building a dashboard for my 2 stroke 20 years old motorcycle. To lower the voltage I've made a voltage divider. I came up with circuit as in attachment. Which is exactly what I want. Nov 8, 2019 · Your circuit to interface the Arduino/Tinsey to the ignition coil looks simple and efficient so I built the circuit and it works with a signal generator very well ++ output of generator wired to TACH_SIGNAL -- output of generator wired to GND However, i'm confused as to how its actually wired to a ignition coil since most classic cars pulse the Sep 20, 2022 · Hi, Rather than wind the coil around the ignition lead where any leakage of the spark will cause some circuit damage. If you have one coil per cylinder you just need to pick the negative pole on one of the coil. Feb 21, 2021 · I am planning to make a tachometer for my classic car with no ECU from where I could get a signal. The sensors on this bike for the RPM & Speed or mechanical. Nov 2, 2018 · Hello, I'm making a project of motorcycle tachometer. ziufghr gqig jxnpt hhrujge wbexcl pndlyw cimx jtwrb minxea uhvpb qfkpzct ttq dskt ucgcnnn tgwog