Help to build an alcohol controlled engine stopper

I am new to arduino learning about arduino is so cool :slight_smile:
I wanto make an alcohol controlled engine stopper could anyone give me circuit diagram and program for it ?
Thank you

Hi,

Welcome to the forum.

Have you googled, arduino breathalyser

Tom.... :)

What does an "alcohol controlled engine stopper" do?

It sounds like something intended to stop an engine that is fuelled by alcohol?

But I thought they would stop by turning the key or pressing the stop button, just like a petrol engine.

...R

I can stop engines and I am usually fuelled by alcohol.

I guess he is interested in preventing intoxicated people from operating a car, a laudable application for an Arduino.

The Key components are: 1. An alcohol sensor say https://www.sparkfun.com/products/8880 2. An Arduino (say, Uno, Nano etc) 3. A relay which does something (to be later specified) to disable the motor. Other, more complex solutions which integrate with the motor's engine management/diagnostics unit are also possible. 4. Some LEDs with current limiting resistors to indicate Pass, Borderline, Fail, Extreme Fail 5. A sketch which ties it all together.

Some method of calibrating the sensor and determining the thresholds during a testing period would be required. Naturally, an adult should be on hand for testing the Borderline, Fail, and Extreme Fail conditions.

Yes, a vehicle if driver is drunk engine need to stop thats what i intend to say can anyone provide me a sketch and circuit

Exactly almost same like breath analyser it only blink led instead i want to stop a say motor (for now) that allredy connected to arduino thats currently on working condition when alcohol smell comes through sensor it needs to stop (above certain amount of alcohol i guss) I wanto make a prototype using a small motor then engine later Please help

"I am a student ,who intrested doing arduino projects"

can anyone provide me a sketch and circuit

The statement and the question seem to be illogical.

A student attempts to learn...not ask for a given solution. The research part is the you learning bit.

Hi, See post #1, have you googled?

Tom... :)

re-read post #1
do that, take notes and save links for later

re-read post #5
make notes

make a sketch of the parts you think you should use
make a list of parts you think can do what you want.
make sure all the parts can work together, sometimes you have to change a 5v device to a 12v device to work with something that only comes in 12v. Sometimes you have to find a 5v version or else buy a 2nd power supply.

create a drawing showing how these thing would be connected.
LIST POWER CONSUMPTION of each part. the low cost alchol sensors use a lot of power and often need to run all the time to hold calibration. the MEMS version are tiny and use almost no power, but are more expensive.

once you think you have it working, re-read post #4 and contact Johnny010 to see if he can help test and calibrate it.
I am very sure he will not have any problem in attempting to reach some desirable levels for which to measure.

Johnny010:
. . .
A student attempts to learn…not ask for a given solution. The research part is the you learning bit.

That is “old school” stuff. Nowadays people talk of collaborative development, leveraging social networking etc. etc. which is what the OP appears to be doing. That will work as long as there are still enough people left with the appropriate skills and experience to solve all the problems.

That is "old school" stuff.

Karma for that sardonic observation! Why, when I was young and being chased by dinosaurs...

6v6gt: That is "old school" stuff. Nowadays people talk of collaborative development, leveraging social networking etc. etc. which is what the OP appears to be doing. That will work as long as there are still enough people left with the appropriate skills and experience to solve all the problems.

Jokes aside,

I teach as a career (hopefully not forever!). The modern student ethic is that of "I will get someone else to just tell me the answer". There is a huge issue with apathy.

It is one of the larger problems with the new ways of teaching/parenting. Students have a natural reaction to a posed problem along the lines of "I do not know", guess or hope an answer is provided. There is usually little thinking involved and they all take the easy way out...the hope that the teacher will just provide the answer so they get their pat on the back and the world revolves as normal with happy parents.

I think the main quality of a student is to ask questions ,i did reserch and known some stuf like mq3 sensor and connecting it using arduino board And the sketch part is confusing how to write it thats what m serching for now

Never mind the fine detail for moment. Can you describe in a series of steps (in English) what must happen for your project to work?

(And have a look at Planning and Implementing a Program).

By the way, you will need a lot of safeguards to ensure that the motor is not switched off when it would be dangerous to do so. Rather than stopping the motor, it may be more sensible to prevent it from being started. But that can come later.

...R

sherinajumal: I think the main quality of a student is to ask questions ,i did reserch and known some stuf like mq3 sensor and connecting it using arduino board And the sketch part is confusing how to write it thats what m serching for now

A phone answer-machine also asks questions.

Either way, you need to ask the correct questions, ones based on your prior attemps. You say you have researched the MQ3 sensor...so I can only assume you know what output it gives? Have you read a datasheet?

sherinajumal: I think the main quality of a student is to ask questions ,i did reserch and known some stuf like mq3 sensor and connecting it using arduino board And the sketch part is confusing how to write it thats what m serching for now

what did you find when you re-read post #1 and followed instructions ?

Yes i read the datasheet of mq3

Yes i googled it about breath analyser too the project i saw is blinking led when alcohol level is high in this project when sensor sense purticular level it blink led But my case i wanto stop a load that is currently working or prevent from starting if its of position