Edward Lewis could I ask you for some help please

Enjoy the build!

When you go max rpm when in neutral, does the needle bounces? Or doesn't it do it because of little input lag?

If you use an Attiny 85 microcontroller instead of a whole arduino nano board...the attiny is 1 dollar the resitors diodes and transistors are cheap as hack and can be found in old electronics as well...so about 2 max 3 dollars for the electronics and the price of the rpm indicator which I have no idea how much does it cost... :))

thanks man!!!

Eddie Behr you are welcome ! :))

and did you manage to build ?

mine are not

Can you tell me what Diode you used? The link doesn't work and not sure on which one to get thanks.

1N5349B IN5349B Zener diode 12V 5W DO-15 IN5349

Jae hyun Park build a car with arduino ecu

M. Wikan Sasongko arduino is practically too practically too slow for that

i have faith in amstudio that he will come up with something

No it isn't. The Arduino uses the "Tone" library to drive the transistor. The tone library is capable of outputting from 31Hz to 65,635 Hz. As seen in the video, it drives the tachometer over the full RPM range without breaking a sweat. If you pause at 4:49 you can see the software is configured to send serial data at 64Hz. So you will only get updates 64 times each second (making the needle "step" a little). The minimum number of cylinders the tachometer can be configured to accept is 4. On a four stroke, there are two up-down cycles (revolutions) between spark events. Since there are four cylinders, half of them have a spark event per revolution. Of those two, they fire alternating so each, single 360° revolution will produce 2 spark signals to the tachometer. (Unless it is a stupid (GM) and they spark even on the exhaust stroke...) The gauge reads up to 11,000 RPM so that is 22,000 pulses per minute for a 4 cylinder. Well under the maximum 65,535/s * 60 seconds in a minute = 3,932,100 that the Arduino is programmed to output. Since the minimum frequency is 31Hz ( * (60 sec in minute)/(2 pulses per revolution) ) the arduino cannot drive the tach between 930 RPM and 0 RPM. If you set the gauge for a 6 cylinder the gap would shrink to 620 RPM, and would be only 465 RPM for an 8 cylinder. This would require you to change the pulses per RPM generated by the Arduino however something simple like replacing "rpmTone.play(freq);" with "rpmTone.play(freq*1.5);" or "rpmTone.play(freq*2);" on line 994 of the sketch. You can see a general delay in the physical gauge lagging behind the virtual one. This is partially due to the 64Hz data rate but mostly due to the stepper motor in the gauge. The motor driver in the gauge has a maximum speed which limits the needle's ability to keep up. I think digital is best/fastest. If you need a needle, you can simulate one but you can get the same (better) effect with LEDs around the circumference. If you just want to be old school you can get great results with aircore gauges and driving the sin/cos coils with analogWrite()'s.

Jae hyun Park i

By far the best video / tutorial I've seen on this subject

Thanks mate!

Thanks Alvaro

Awesome!

The best!

Thanks Dennis! You might have to get yourself a PC!

PC > XBOX > PS

Alfredo rodríguez pc master race

Alfredo rodríguez Hello for ps4 can you tachometer?

Thanks!

i have a saab too

Mihin Karunaratne you NEED IT......so?

Just buy one, they are cheap

There's already a diy h pattern on hackaday. I've built one and use it all the time. Search up "diy h pattern" and it should be the first result.

The G29's H-Shifter costs $59.99 USD

Only I paid 30 quid for mine brand new

i.imgur.com/4VbSiI0.jpg Question ? with a Speedometer is it the same circuit ans construction ?

caranya gimana gan

@@amryms saya ganti sja diode yg dia pakai dgn diode yg saya dpt cari dgn spesifikasi yg plg dekat, ikut shj schematic balik dgn arah polarity diode

The Bandinator this is what ive been waiting on

Another vote for a boost gauge tutorial. A fuel gauge would be good too because I'm thinking of building a instrument cluster and I'm not sure how pressure based gauges would work.

Project.R Boost gauges work by pulling vacuum by tapping the vacuum line inline with the manifold pressure, to simulate would be pretty tricky. However digital guages might work the same as this tutorial.

Project.R Boost gauges work by pulling vacuum by tapping the vacuum line inline with the manifold pressure, to simulate would be pretty tricky. However digital guages might work the same as this tutorial.

Yea, that's what I was thinking with digital gauges. I'm not in a real rush to make one. I'm still waiting on the parts to make this Tacho and the other digital dash display that amstudio made made on KZfaq.

Same thoughts!

Thanks!!