The IC inside the CDI

[tzr-v4]

I'll try OEM pins description after garden maintenance 

[Louis]

after garden maintenance 

Hope you don't have a big garden

[Paul]

after garden maintenance 

Hope you don't have a big garden

Whaaaahahaha

[tzr-v4]

Done the garden very quick and when to the garage 

Balance : TDR250 has same pins as the 3MA in the IC

Louis can you check please if it is OK

NAME -> PIC Pin         <=> OEM IC | bike
// Power
VDD (5V) -> Pin 20      <=> Pin 42 | 3MA + 2YK
VSS  (0V) -> PIN 19     <=> Pin 21 | 3MA + 2YK
// Analogic To Digital
ADC_YPVS     ->   AN0  <=> Pin 36 | 3MA + 2YK
ADC_TPS      ->   AN1   <=> Pin 35 | 3MA
ADC_SPEED    ->   AN2 <=> Pin 33 | 3MA
// Logical Outputs
BLINK_LED    -> RB5    (blinking led to see that PIC is running)
YPVS_OPEN    -> RA3    <=> Pin 5 or 6 | 3MA + 2YK
YPVS_CLOSE   -> RA5    <=> Pin 5 or 6 | 3MA + 2YK
AIR_JET1     -> RC1       <=> Pin 27 or 26 | 3MA
AIR_JET2     -> RC2       <=> Pin 27 or 26 | 3MA
IGNITION     -> RC0       <=> Pin 22 | 3MA + 2YK
// Interrupt
PICKUP       -> RB0      <=> Pin 13 | 3MA + 2YK

Here my setup

[Louis]

Louis can you check please if it is OK

Yes just did its the same

Oem IC (3MA and 2YK)

Voltage and Mass.
Pin 42-----5V (3MA and 2YK)
Pin 21-----0V (3MA and 2YK)

Analogic To Digital
Pin 36-----YPVS (3MA and 2YK)
Pin 35-----TPS High (3MA)
Pin 34-----SPEED Low (3MA)
Pin 33-----SPEED High (3MA)

Logical Outputs
Pin (5 - 6) ----- YPVS (open - close) (3MA and 2YK)
Pin (5 - 6) ----- YPVS (close - open) (3MA and 2YK)
Pin 27 ---------- AIRJET 1 (3MA)
Pin 26 ---------- AIRJET 2 (3MA)
Pin 13 ---------- IGNITION (3MA and 2YK)

Logical Input
Pin 22 ---------- PICKUP (3MA and 2YK)

We can use the signal's (pin 33 and 34) from the Speedlimiter for extra functions.
Those wires go from IC to clocks. (coming out in a three way connector witch has a nice mass signal to)
Just some info: http://www.tzr3ma.com/speed-limiter.html

[tzr-v4]

Some work done at the school electronic lab 















All the components to compare OEM to programmable


Wires to be soldered on the adaptor to connect the ICP12

[Louis]

Looking promising

Can't wait for the results
Do you have some nice ideas for the software? What can we make adjustable? And what options do we have programming it?
(By mobile phone)

[xracer]

 Without doubt you two guys are something else. Your knowledge and ingenuity never cease to amaze me . Just to confirm what I think is going on, is the end result going to be a fully programmable ignition / power valve controller that will replace the 3ma unit and possibly the 2ma as well. If so , Ill buy one !!!

[tzr-v4]

Tested OEM CDI with my piggyback IC 

The bike runs and YPVS cleaning is operating.

I'll plug the oscilloscope to get the signal shapes

Can the sliding could come from the use of pickup falling edge signal not the rising edge?

Could be easy to change and test... Louis

[Louis]

The bike runs and YPVS cleaning is operating.

The IC it self seems to be quit strong, my desoldering what probably less advanced as yours
No less after all my heating the IC still worked

Can the sliding could come from the use of pickup falling edge signal not the rising edge?

I was wondering what signal you used?
The rising edge would be more steady than the falling edge (I think) do to the speeding up wile traveling over the flywheel lobe.
(the Lob on a 3MA3 flywheel is quit longer than the 3MA1)


Theoretical it should not be different, but you never know

Could be easy to change and test... Louis

Ill make my test bench ready for some new software

[tzr-v4]

I've been a little in the garage and the setup is building up
- PC
- USB Oscilloscope
- PC power supply to provide 12V
- OEM CDI

Here some results on the pickup signal.
Will do more tomorrow 

[Louis]

Looking good Olivier

Think your equipment is better then mine, have a similar image measuring on pin 13


I don't had that peek at the beginning off the signal, think your's is more accurate

[tzr-v4]

I'll check if the lower part (0v) change in length (or time) with rpm.

Test tomorrow.

[tzr-v4]

Quick tests after home maintenance 

Legend
- Green is pickup signal on the IC
- White is the ignition order from the IC
- RPM around 3000 at the tachometer

Pickup frequency is about 87Hz so 2610 rpm.
Seems OK as we all know the tacho is cheating 



Lower part (0v) of pickup signal varies with RPM so impacted by the lobe length 
We can see that ignition signal starts after the falling edge of pickup signal.

I'll change my code to detect the falling edge of the pickup signal not the raising edge.

More to come 

[Louis]

Hello Olivier,

Great that you have spotted the problem
But I like to see it to, and dont see it. (sorry)

Here is mine point a few, perhaps I'm seeing it wrong


Red line:
Start of the pickup signal (digital incoming signal, not analog)

Blue line:
End of the Pickup signal (the back edge off the lobe passing the pickup)

Purple
The distance between, is the length off the lobe. (digital incomming signal, not anolog)

Yellow line:
Start of the ignition signal coming from the IC

Grey:
The calculated time for giving a usable signal to different components on the CDI board (to work correct)

Green:
Calculated delay time to give ignition signal

What do I see wrong?, like to join you with the correct thoughts
Or does it fires when the ignition signal is at 0V, then I see exactly what you mean (brown arrow)