Bluetooth Tachometer
Natalí Stibb
The BT LED Display is the essential tool to complete your racing setup for competition. It features:
15 built-in LEDs for tachometer function (RPM).
A central numeric display area indicating gear number.
Left and right alphanumeric display areas with 4-character and 14-segment displays.
6 warning/marshalling LEDs positioned at the left and right of the unit.
3 rotary selectors with push button.
An On/Off switch.
Adjustable brightness.
Its Li-ion 3.8V 2600 mAh battery is rechargeable via micro-USB cable: from 24 to 48 hours of battery life.
(#) PS5 games compatibility has been tested and endorsed by Thrustmaster. At stage of publication, PS5 compatibility of the full range has not been yet tested nor endorsed by Sony Interactive Entertainment LLC.
The problems is that as soon as i connect the orange cable with my motorcycle it star sending weird digits like 52839 (not even possible the motorcycle idles at 1250 rpm aprox) and then it stop sending at all and as soon as I disconect the orange cable it comes back and the bluetooth module starts working again sending 0 RPM
Without a scope, you don't know how clean is the signal that you are counting. It may be very noisy- especially if the tachometer on the vehicle is a simple meter movement. It could also be higher than the input limits of your Arduino.
TUNE+-6-R-V-SM-IE for D-Jetronic DESCRIPTION The wireless programmable 123\TUNE+-6-R-V-SM-IE is designed for the Citron SM, Maserati-Merak & Merak SS. 123ignition is proud to announce the first fully, via Bluetooth programmable ignition for the Citron SM! Control your 123\TUNE+ with your iOS/Android smartphone or tablet. The App makes it possible to adjust the ignition curve and shows an electronic dashboard. The Citron SM tachometer can be directly controlled by this product without using any additional modules or modifying the original gauge. Main features: REV-counter, Antitheft system by a PIN code, Real time tuning, Vacuum advance, Vacuum retard, Soft REV-limiter, D-Jetronic injection outputs, tachometer output signal etc. Includes a high energy coil for optimal performance. Specifications Cylinders: 6 Directions: CW/CCW Voltage: 9,0 - 15,0 volt Range: 500 - 8000 rpm Temperature: -30 to 100 Celsius Coil: stock or High Energy coil, primary coil NOT below 1,0 ohm Dwell: constant current, fully autom. Time-out: after 1 second current is switched off Spark-bal:
As the main workhorse I went for a 2018 Triumph Street Twin, because it's practical but still fun, fairly cheap, and simply beautiful. I love it to bits, but one thing I really missed: a tachometer ("rev counter"). While trying their hardest to segment the Bonneville range, Triumph clearly thought that people would pay a few grand more and get a Speed Twin just so that they could see RPMs. It took them about 4 years to understand the silliness of this position (or to produce enough Bonneville variations that nobody cares about that bit anymore), so post-2020 Street Twins display RPMs on the digital display - in a pretty small way, but at least it's there.
So, how could we go about adding a tachometer to pre-2020 models? Various web searches produced a few different methods, with a number of pitfalls. There are a few electrical schematics floating around, but I'm not good at that sort of thing and comments seemed to be that they are easy to get wrong.A much easier method is to attach an OBDII ("OBD2") reader to the related port, which is available under the seat.
OBDII is a standard interface for debugging systems in vehicles; it's recently been mandated by the European Union, so it's available in pretty much any vehicle produced in the last decade or so. Once you connect a reader, you can see a wealth of information about the vehicle, from fuel consumption to engine load to pretty much any sensor available... including RPMs! So that's how we can get a tachometer without effectively modifying anything in the bike itself.There are two ways to show the extracted information: wired, and wireless. Each comes with pros and cons.
Wireless is less intrusive but fiddlier: a compact reader stays entirely under the seat, and communicates with a phone or tablet over Bluetooth (as far as I know, there are no dedicated wireless displays). It's described in this Youtube video, and the dongles are easy to find on Amazon. As a permanent solution, it suffers from lag and the requirement that the phone screen stays on all the time, set on the specific app. (Side note: I found the best iOS app to be FourStroke - most of them are focused on cars and might not even work with cheap aftermarket readers.) I have an old phone I mount on handlebars, but I typically want to use it to display GPS stuff and play music, so that just didn't work for me. You also have to manually open the app and connect every time, after you start the bike, which is annoying.
A wired solution, on the other hand, requires a bit more setup, but you do it once and that's it, you don't have to worry about it ever again; readings are a bit less laggy (although still not as quick as hardware ones), and leave your phone free to do other stuff. They typically also feature hardware controls, which are easier to use with gloves than touchscreens (yes yes, I have modern gloves - in practice, they are still too big to be precise).
There are a few OBDII readers on the market, largely meant for the car market. I grabbed this cheap thing from AliExpress, but there are equivalents on Amazon and so on. Setup is trivial: you connect it to the port, turn on the bike, and it just works, letting you choose what to display. You turn the bike off and the display shuts down automatically, so your battery is not drained. Nice!
Finding a location for the wire is basically the same as for the USB you also find under the seat; if you've wired it up to a handlebar mount for phones, as I have, you can basically do the same - it's actually easier here, since you can push it further back with the other cables.
All these issues could be solved if manufacturers started making readers dedicated to the motorbike market. I hope that happens at some point, because it would be awesome - it would free consumers from the tiranny of OEM displays.
Last bit of advice: while you're testing, be careful with your dangling cables! As you can see from the pic below, I mistakenly left mine over the exhaust for a few seconds and... well. Amazingly, it still works!
This T56 Magnum wiring harness makes swapping in the trans painless when it comes to the wiring side of things! It includes the plugs for reverse lockout, speed sensor, and reverse lights. BUT on top of that, it includes a bluetooth module, which allows you to convert the speed signal to work with OEM speedometers. And on top of that, it allows you to control the reverse lockout, for example LOCK out over 4MPH, unlock when under 2mph, and set delay times!
This eliminates the need for a separate lock out control box which used to be the only option to activate the reverse lock out correctly. Currently most folks just simply connect their lock out solenoid to a momentary on/off switch such as the brake light switch to activate. This method will get the job done, but can over work the solenoid, and over time shorten its life span.
For your electronic speedometer, the harness is equipped with 2 speed sensor outputs. The speed sensor outputs generate a square wave signal that goes from about -5 to roughly +5 volts, varying in frequency as the speed changes. But what if your ECM input needs a positive only signal? No problem! The output will automatically shift and give you 0 to +10 volts. The 2 speed sensor outputs are completely independent and can be calibrated separately with any pulse count and ratio you want.
I just got a CMAX SE with the 201A package. I read where as standard equipment, it should have a tachometer. I cannot get it to show up on any of the screens no matter what arrow, button or OK I push. Is there one or not, and if so, please walk me thru how to get to it. It's driving me nuts!
OK. I finally see Tach, temp and a lot of other options. Now I need to figure out how many of these I can display in My View. Right now, all I have id the tach and avg fuel economy. Can't seem to add anything else. Still learning! This is harder than setting the clock on the old VCR!
Guess I`ll be having my Tech Savvy Salesman program all those settings for me too. Some of us aging Dinosaurs without Grandchildren handy need all the help we can obtain. The old axium KIS is long gone. Some of us as still happy with our antiquated "Dumb Phones". Imagine life without "Bluetooth"? Yikes!
We had quite a time getting the bluetooth to sync up last nite, but a nice lady from Ford stuck with us while we sat in the car with one cell phone talking to her while syncing another cell phone. She walked us thru a step at a time and we finally got it. Then we were able to sync the other one on our own. Very helpful and patient lady. Probably thought we were as dumb as a post, but never showed it!
Figure 1. Typical component application for DC fan speed measurement. The input Pin_1 is configured for resistive Pull Up. Tachometer is configured for 2 inputs, continuously sampling fan speed both on falling and rising edges. Sampling rate is 20Hz. See details in the link above.
It is possible to substitute 32-bit DWT timer with 24-bit SysTic timer, available on PSoC4, which will affect the specs of the tachometer, and require additional testing and modification of the Datasheet. That is too much work for me at this point.
UT372D 2-in-1 Tachometer is a reliable and safe tachometer, which combines contact and non-contact measurement modes. It is mainly used to measure Revolutions Per Minute(RPM) , frequency, surface velocity and length in the fields of motors, fans, automobiles, papermaking, etc.
Purchase wholesale motorcycle speedometer bluetooth with various designs at reasonable prices. Whether you are looking for a simple motorcycle RPM meter, a dirt bike RPM gauge, a trip meter for motorcycles or even a wireless hour meter for dirt bikes, you will be able to find the item you need in the product listings.
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