LED DIGITAL SPEEDOMETER ( BTTF style)

[Doctorbass]

Does someone is interested by this project

http://www.randomwisdom.com/2007/10...g-pic-microcontroller/comment-page-2#comments

I'm looking for someone that would take the time to make some of the PCB and program some pics...?

I could pay the material to that person in exchange for his unit..... so that person would get one free.. just the time to make some copy for me and the E-S crowd..

I love these BTTF style display!

I want one but have no time to build one and have no pic programmer.

The guy said it's open source but he would love to see our projects.

http://i10.aijaa.com/b/00163/6609585.jpg

http://www.aijaa.com/v.php?i=6609584.jpg


Doc

 

[knoxie]

very cool..you also need to make one of these as well doc

http://www.gizmodo.com.au/2008/04/diy_gforce_meter_turns_your_civic_into_top_gun-2/

 

[Doctorbass]

I found some interestimng idea on some BTTF part and replica website!
http://www.bttfparts.com/board/viewtopic.php?t=1155

Doc

 

[kfong]

Hi Doc, I could help you out on this. I already have 2 boards that can be used, the 4 digit display, an alarm can be added. I can also build you something smaller based on the 2 displays shown. Here is the pics of the boards. Maybe we can do a trade for A123 or konions. I can always use spares. I can CNC a custom enclosure for you as well.

Kin

 

[knoxie]

8) nice that looks like a good offer Doc!!

I use a Garmin Quest which has a nice backlit dashboard like this, its cool as the GPS also tracks your speed and elevation as well so you can download the data and map it out. oh and of course it will take you to your destination as well :lol:

You can get flexible mounts to fit them on the bars they are waterproof and you can get one pretty cheap second hand on Ebay.

This is what you get if you select the dashboard screen

 

[Doctorbass]

Hi Doc, I could help you out on this. I already have 2 boards that can be used, the 4 digit display, an alarm can be added. I can also build you something smaller based on the 2 displays shown. Here is the pics of the boards. Maybe we can do a trade for A123 or konions. I can always use spares. I can CNC a custom enclosure for you as well.

Kin

Good new Kin!!

I am interested!

So these board can display speed... ? or are they just voltmetre style?.. I mean is there any circuit with a tach input awith some calculator for calculating speed in kmh.. or in mph?.. or calibration?.. Please give me some details about these baords if they are originally built as spedometer ? or you just program the pic to let it do what you want?

2 or 3 digit is not really important.. What i love in that project is the old style BTTF 7 seg display with grey background led display and the original color of the emeeting led.

Yes if you can cnc a box to make it to look like the original bttf or as close as possible.. it's perfect for me.

After some delay, I finally received some more A123 and Konion cells :wink: .. we can trade no prob!

You have the link of the bttf replica here to give you some guidelines: http://www.bttfparts.com/board/viewtopic.php?t=1155

The best would be that the refresh rate of the displayed speed would be the fast as possible... more than 0.5hz or higher.

Doc

 

[Doctorbass]

8) nice that looks like a good offer Doc!!

I use a Garmin Quest which has a nice backlit dashboard like this, its cool as the GPS also tracks your speed and elevation as well so you can download the data and map it out. oh and of course it will take you to your destination as well :lol:

You can get flexible mounts to fit them on the bars they are waterproof and you can get one pretty cheap second hand on Ebay.

This is what you get if you select the dashboard screen

Ah those GPS on ebike.. A real usefull tool when you have above 1kWh of juice!!

I already have a Garmin E-trex venture CX and i love it...

The goal with the LED display is to have a BTTF style speedo. I love the visual feeling of these yellow old style led display of BTTF!

BTW.. that is their 25th anniversary !!... bttf IV ... ishhh??



Doc

 

[lifepo4ever]

Hey doc you miss your dolorean http://wn.com/BTTF_Delorean_Conversion__Digital_Speedometer

and look on the background the guy as the fusion reactor on is desk

 

[kfong]

Hi Doc,
They are general purpose boards that can be used for speedometer as well. All I need to do is modify the original source code to conform with the hardware. The easiest ones to do are the two that are built as shown in the picture. The display can be swapped out if digikey has the grey ones. You have the choice of the 3 digit or 4 digit. The 4 digit board there is an optional piezo alarm that can be installed. I can change the code to sound off an alarm once a set speed has been reached 88 mph. Ect. With 3 digit 99.9 mph 4 digit 999.9 mph

If you need a custom setup, the smallest form factor. The grey display with the small controller board can be created, the digit can be masked out with a custom cnc enclosure if you are going for a true BTTF type disply and the narrow dashboard look but this requires more work and time on my part.

I can CNC a box to fit, as you can see the display is attached to the board so the box will not be narrow. The 6 inch ruler on the side gives you an idea of the size.

The box can be done in aluminum or plexiglass. It all depends on how fancy you want it. Even a custom handle bar mount can be made and fancy text can be put on the surface.




Good new Kin!!

I am interested!

So these board can display speed... ? or are they just voltmetre style?.. I mean is there any circuit with a tach input awith some calculator for calculating speed in kmh.. or in mph?.. or calibration?.. Please give me some details about these baords if they are originally built as spedometer ? or you just program the pic to let it do what you want?

2 or 3 digit is not really important.. What i love in that project is the old style BTTF 7 seg display with grey background led display and the original color of the emeeting led.

Yes if you can cnc a box to make it to look like the original bttf or as close as possible.. it's perfect for me.

After some delay, I finally received some more A123 and Konion cells :wink: .. we can trade no prob!

You have the link of the bttf replica here to give you some guidelines: http://www.bttfparts.com/board/viewtopic.php?t=1155

The best would be that the refresh rate of the displayed speed would be the fast as possible... more than 0.5hz or higher.

Doc[/quote]

 

[bigmoose]

I don't know if this will help anyone, but 7 years ago my daughter started driving an old Buick. The car had a very poor speedometer, so I built her a digital one that operated from a photodiode that was modulated by the speedometer cable spinning. That sensor was built into the speedometer by Buick. This design dimmed the LED's based on the voltage to the instrument cluster bulbs.

The schematic is below, and I'll dig around for the firmware. It is not exactly what you want Doc, but perhaps someone can use bits and pieces from it. Not many parts. I have PCB Gerbers also.

 

[Doctorbass]

I don't know if this will help anyone, but 7 years ago my daughter started driving an old Buick. The car had a very poor speedometer, so I built her a digital one that operated from a photodiode that was modulated by the speedometer cable spinning. That sensor was built into the speedometer by Buick. This design dimmed the LED's based on the voltage to the instrument cluster bulbs.

The schematic is below, and I'll dig around for the firmware. It is not exactly what you want Doc, but perhaps someone can use bits and pieces from it. Not many parts. I have PCB Gerbers also.

Hmm. That's interesting Bigmoose!

Do you still have some of the PIC left ? do you remmeber what was the latch rate of the display?

Doc

 

[bigmoose]

Doc here is the firmware for it. It looks like I had a 500mS refresh rate. If anyone uses the code, mind that some comments wrap around at the end of the line.

 

[Doctorbass]

Doc here is the firmware for it. It looks like I had a 500mS refresh rate. If anyone uses the code, mind that some comments wrap around at the end of the line.

Bigthanks!

Doc