AC-CDI v10



Features

  • Programmable AC-CDI
  • For ONE or TWO* cylinders
  • For [2 strokes engines] and for [4 strokes engines with wasted spark*]

    * On 4stk engines with 1 pickup on the crankshaft, one spark occur at compression stroke and one at exhaust stroke. Firing in the exhaust stroke is a wasted spark. Hence the name…

  • 80MHz MicroController control unit
  • Easy programming with Micro USB Type B connection and terminal console
  • Compatible Windows, Linux, Mac
  • One programmable ignition timing curve
  • Rev from 10 to 20,000 RPM
  • 0 deg advance from 1 to 500 RPM (to avoid kickback)
  • Adjustable timing in 13 steps from 500 to 20,000RPM
  • Soft rev limiter.
  • Stator can be half or full rectified (for more power and ground isolation).
  • 1 input for an inductive pickup (VR) or Hall type or Points
  • Pickup polarity can be set to Positive, Negative or Automatic detection.
  • 1 output for a Capacitive coil type.
  • Non volatile configuration
  • Square 12v Tachometer output
  • LED Indicator
  • Kill switch input
  • Power supply voltage DC 10 to 16 volts
  • Current drain: 100mA
  • Protected against reverse supply voltage
  • Available as a ready-to-use device in the SHOP section
  • Dimensions: 100 x 60 x 25mm (3.9 x 2.4 x 1inch)
  • Plastic box potted for Electrical insulation, Protecting components from mechanical shock and vibration, thermal shock or Moisture
  • 15cm(6”) 1.5mm2(16AWG) wires soldered with 6.3mm automotive female connector
  • Source not available
  • Made in France

Cylinders:

Single-cylinder:
If there is one separate pickup:
=> This AC-CDI works.
If there are 2 separate pickups (one for low RPM and one for High RPM):
=> This AC-CDI works.
If there is no separate pickup and the timing is done by using the High Voltage of the stator:
=> This AC-CDI will NOT works
If the engine works with Missing Teeth:
=> This AC-CDI will NOT works

* Twin-cylinders at 360° crankshaft angle:
The engine works with WASTED spark.
If there is ONE twin coil:
=> This AC-CDI works.

See: CDI compatibility

Remember that ignition coils are different from TCI to CDI system
– CDI coils have low inductance and impedance around 0.5-0.8ohm
– TCI coils have higher inductance and impedance around 1-3ohm

Remember there are AC-CDI and DC-CDI…


Pickup:

– 1 input for inductive pickup with 1 signal per crank rev.
– Pickup must puts out 3 to 30Vac
Points, reluctors, Hall sensor, optical sensors can be used as long as they give only 1 pulse per revolution.
– This CDI is not compatible with multi-pulses pickup or missing tooth wheel.
Click here for more info

How to calculate the Pickup Position?

Pickup Polarity

Check the polarity of the pickup (Negative then Positive/NP or the opposite PN) with a Needle galvanometer (in milliAmp position) while kicking.

For a better understanding, this video can help.


Rev Limiter:

The last RPM value you enter is the “rev limit” that stop all sparks.


Ignition timing

Draw the ignition timing curve into this XLS sheet.


Terminal console

Click here for more info
 
CoolTerm for Win/Mac/Linux
Teraterm, Putty, Kitty for Win
– Console commands for Mac:
terminal
ls /dev/*usbserial*
screen /dev/cn.usbserial-xxxxxxxx 115200 -L
screen /dev/tty.usbserial-xxxxxxxx 115200

– Console commands for Linux:
3 ways to find the COM-port:
tail -f /var/log/syslog | grep USB
dmesg | egrep --color 'serial|ttyS'
ls /dev/ttyUSB*

Config port:
sudo su
stty -a </dev/ttyUSB0
stty -F /dev/ttyUSB0 cs8 115200 time 10

Connect:
cat /dev/ttyUSB0 & cat > /dev/ttyUSB0


HowTo setup

Setup ACCDIv10r1.pdf
Setup ACCDIv10r2.pdf


Wiring

Ready-to-use unit:
For Half-Rectification and Common ground.
For Full-Rectification and Isolated ground. (More power)

Kit unit:
For Half-Rectification and Common ground.
For Full-Rectification and Isolated ground. (More power)


PHOTOS.

Click here for more info



VIDEOS

Click here for more info

Connection to the box:

Setup a ignition timing:

Change the ignition timing:

Test of an ACCDIv10:


VERSIONS

Click here for more info

  • Version v10r0c0:

    • First Version.
    • 5 seconds temporization to detect console.
    • Wires come out at 90degrees.
    • LED on the length side.


  • Version v10r1c0:

    • Automatic detection of the console.
    • Wires come out at 180degrees.
    • Stator can be half or full rectified.


  • Version v10r2c0:

    • Square +12v Tachometer output.


24 thoughts on “AC-CDI v10”

      1. I’ll be very interested in how it works out on the xt200. I have 2 of them I’m rebuilding and have been looking for a good cdi solution. Thank you so much for all of this.

    1. Hi Mark,
      Beware ! AC-CDI v10r0c0 dont use Wifi but use direct USB connection for setup.
      The 2 last prototypes are available now in the Shop and I going to order some new PCB for the modification I had to make. (AC-CDI v10r1c0) So the next sell will be in April…

      I had good feedback from the guy who tested it on Yamaha XT200 – 1982. Some videos will come soon.
      Regards,
      Th
      PS: ACCDI v9 was Wifi but it’s End Of Live now. ACCDI v10 is much more accurate than v9

    1. Hi,
      thanks for your interest. The last one will be available next week and before 31 of May.
      Then a period of 2 or 3 weeks for restock then a bunch of 10 should be ready for the 15th of June.

  1. Hi Thierry,
    I bought an AC-CDI v9 Last year that works pretty good in my XT600 but not really constant. So I want to try the new V10. When will it be available again?
    Greetings
    Markus

    1. Hi Markus,
      thanks for your interest.
      Are you looking for a ready to use version (with box+wires+resin) at 70€ or a kit (all parts soldered on the PCB) but no box, no wires, no potting? The cost would be around 55€.
      I have one kit ready.
      Regards,
      Thierry

      you can also PM me at frtransmic [at] gmail.com

      1. Will it be added if I purchase ACCDI v10 currently on sale and wait? Or will it be updated to another version or model (v11?)?

  2. I am very pleased to have found your website.
    Currently I have the topic that my cdi is broken.
    Unfortunately I don’t really know anything about cdi and am unsicer whether I need an ac-cdi or a dccdi.
    I hope you can help me further.
    The bike is a MUZ 500 with Rotax (single cylinder 500ccm 4 stroke engine)
    As I read in the forum the CDI of the Yamaha SR500 fits.
    But the CDI generates not only the ignition voltage but also a speed signal for the speedometer.
    Now the question is for me which cdi is suitable and if there is a suitable variant on your shop.

      1. Hello Thierry , thank you very much for your answer.
        I have a circuit diagram ( http://www.miraculis.de/aw/mz/text/mz50r/schalt1g.gif )for my motorbike (year 1993 )
        and I am now very sure that it is an AC CDI.
        What is the timing for the ACCDI v10 Rev 2 from the current point of view?
        If the new version is available by mid-November this would be good, because I have to get the bike ready to ride again in November, because it is at a friend’s place who needs the space again.
        Best regards,
        Frank

        T

        1. Hello Frank
          Yes it’s an ACCDI but you have to know what each wire is for.
          Why are there 4 wires from CDI to Stator (perhaps: HV for high revs and for low revs, gnd, and last one?)
          and also why 3 wires to ignition coil?
          I have ordered 20 PCB of new version V10R2, They will be there in November. Otherwise there is the last kit ACCDI v10r1 in the shop.
          Best regards,
          Thierry

    1. ACCDI v10r2c1 has been developed. I just received the PCBs yesterday the 24th and I’m building and testing the first one. It should be in the shop this WE. I’ll shot you a Email when done 😉

      1. Thank you for your reply!
        I bought it!

        By the way, is it possible to convert 12V of tachometer pulse to 5V? (12v→5v)
        Should I use a resistor to divide the pressure?

        1. I got your order Thanks! It will leave on the 2nd of Dec.
          Yes you can use 2 resistors of 1k to divide to +6v (or only one resistor, the same value as tacho internal resistance)
          Regards,
          Th

  3. Hi Thierry,
    I’m also interested in one of the new cdi units.
    can you please inform me per mail when the next available in shop?
    I can also solder it by myself. so i need only the parts if this would be faster.
    Best regards,
    Frank

    1. Hello Franck,
      Two ACCDIv10r2 (with tachometer/RPM meter) will be available tomorrow the 29th of Nov.
      I’ll send you an email.
      Best regards,
      Th

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