Ignition system – Programmable AC-CDI
This technology will make your motorcycle tuning much simpler and faster.
Just connect your phone to your motorcycle and you’re ready to go!
A programmable ignition is extremely valuable in repair work as it fits a wide range of bikes.
It’s especially useful if the original part has been discontinued or is overpriced.
And of course it’s a must-have if you are wishing to tune the engine.
- Programmable AC-CDI
- Suitable for ONE or TWO* cylinders
- For [2 strokes engines] and for [4 strokes engines with wasted spark*]
* On 4stk engines with a pickup on the crankshaft, one spark occurs during the compression stroke and another during the exhaust stroke.
- Easy programming via WiFi connection.
- You need a simple web browser on any smartphone or laptop. (No app)
- ONE or TWO programmable ignition timing curves. *
- Rev from 10 up to 30,000 RPM.
- 0 deg advance from 1 to 500 RPM. (To avoid kickback)
- Adjustable timing in 13 steps from 500 to 20,000RPM.
- Rev limiter.
- Live Display of RPM and Timing via Wifi.
- 1 input for an inductive pickup (VR). Pickup polarity MUST be Positive first.
- 1 input for an Hall Effect Sensor, Optical sensors or Points (An external resistor is required) *
- VR conditioner to extract pickup signal in noisy environment.
- 1 output for a Capacitive coil type.
- Stator can be half or full rectified. (For more power and ground isolation)
- 1 input for Kill switch.
- 1 input to select Timing N°1 or N°2 at startup *
- 1 output for 12v Tachometer signal. *
- Power supply voltage DC 6 to 18 volts (For Setup AND to operate).
- Current drain: 30mA – 100mA.
- Protected against reverse supply voltage.
- 300V 8A 12pins connector.
- 80MHz MicroController control unit.
- Non volatile configuration.
- 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.
- Made in France.
Pin 4 is the black mark
To program the ignition, please Print and follow this procedure: Setup Ignition box.pdf
The 12pins connector has a marker trace on pin4 which is Ground.
1) Connect a Black wire from connector pin4 to the black plug of a 12v battery.
2) Wire a bridge between connector pins 4 and 6 (ground and kill input).
3) Connect a Red wire from +12v connector pin5 to the red plug of the battery to power up the ignition.
4) Led blinks 5 times while a WiFi Access Point named “Transmic_ign” show up on you laptop/smartphone.
(If a password is asked, use “password”)
* 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
PickupClick here for more info
It’s made of a coil of wire wrapped around a magnet.
When a ferrous part passes by the magnet, the magnetic field is modified and a voltage pulse is created in the coil generating a sine wave.
– 1 input for inductive pickup (VR/pickup coil) with 1 signal per crank revolution. (Pickup must puts out 3 to 100Vac)
– 1 optional input for Digital sensor (Hall Effect Sensor, Optical sensors even Contact breaker).
– This CDI works with ONE pulse per rev (1 reluctor only like “A” or “B” below)
– This CDI DOES NOT work with multi-pulse pickup (ie 2 reluctors on flywheel: “C” or “D”).
– This CDI DOES NOT work with a missing tooth flywheel. (“G”)
Pickup PolarityClick here for more info
When the bar/magnet on the stator passes in front of the pickup, the pickup generates two pulses of OPPOSITE polarity.
A pickup has 2 wires. If you ground wire number 1, wire number 2 will put out a Positive pulse first when the rising edge comes, then a Negative pulse when the falling edge leaves. I call it PN.
If you ground wire number 2, wire number 1 will put out a Negative pulse first, then a Positive pulse. I call it NP.
Pickup Polarity MUST be Positive then Negative. to work with this CDI.
Check the polarity of the pickup (Negative going then Positive/(I call it NP) or the opposite PN: Positive going then Negative) with a Needle galvanometer (in milliAmp position) while kicking.
Watchout! If the pickup is internaly grounded and output ONLY one wire, you won’t be able to change the polarity.
So if the polarity is NP (Negative first) then you CANNOT use this ignition!
Pickup PositionClick here for more info
“Pickup Position” is the number of degrees between the very first pickup pulse and TDC.
This ACCDI can use Pickup Position from 1 to 180° BTDC
To be able to provide the largest advance timing (Example 36° @ 4500rpm) the pickup MUST send a trigger signal BEFORE the piston reaches 36° before top dead center (BTDC).
The “Pickup Position” on the Yam XT600 is 50°. Many Yamahas have a “Pickup Position” of 72 degrees.
This “Pickup Position” is dependent on:
– Where the pickup is mechanically located with respect to TDC?
– Where is the flywheel’s bar located?
– How long is the flywheel’s bar?
“Pickup Position” AKA “Max Advance” = “Base Advance” + “Flywheel’s bar Length”
“Base Advance” value sometime appears is User Manuel.
Length of the flywheel’s bar can be measured this way.
Hall Effect Sensor, Points/Contact breakerClick here for more info
– Points, reluctors, Hall sensors, optical sensors can also be used as long as they give only 1 pulse per revolution. They may need an additional pullup resistor.
– 3 wires digital Hall effect sensors need an external pull-up resistor. The default voltage output is equal to Vcc (+5v to 24v). When a magnet passes in front of the sensor, the output voltage goes low and the ignition will detect the RISING edge meaning the trigger moment will be when the magnet LEAVE the sensor.
Models : Hamlin 55100, Allegro A1101-A1104, Allegro old 3141-3144, Honeywell 1GT101DC, SS495, SS49E etc…
Pullup resistor: 370ohm (270 to 1200ohm)
Live Display of RPM vs Timing via Wifi
For diagnostic or tuning purpose, it’s possible to live view RPM and Timing in degrees BTDC on a remote PC connected through Wifi: Video
Because of the impact on CDI performance, please disable this function when you are done with it!
The last RPM value that has been entered is the “rev limit” that stop all sparks.
TachometerClick here for more info
Diagnose with LED.Click here for more info
As soon as a pickup signal is detected, led blinks in rhythm.
If the Maximum RPM is reached, the led turns off. If minimum RPM is reached, led turns off.
– If the box starts in SETUP Mode : Led blinks 3 times before flashing once every 5 seconds.
When data arrives via WIFI, led briefly flashes.
Yamaha XT200 with CDI v10:
Yamaha XT600 with CDI v11:
Yamaha XT125 with CDI v11:
Yamaha TTR600 with CDI v11:
Sanglas converted from points to CDI v11:
Honda MBX 125 onboard with programmable CDI v10:
Translation of the video above
Various parameters must be memorized beforehand
I recommend to roughly determine the position of the sensor with a graduated disc
The stator must be labeled for a pre-adjustment with 10,20,30° marks
First try with a car battery
The positive pulse from the pickup must come first, otherwise swap the cables, otherwise the timing will be clearly wrong
So not this way !
The engine runs under 6v under its own power supply
5 degrees offset
Will it go with the Vape too?
Safe settings: pickup position:70/pickup type:0/adv 0-500:0/5@1000/5@2000/10@3000/20@4000/30@6000
VERSIONSClick here for more info
- Version v12r0c0:
- Evolution of V11.
- [soft] New menu. User can select strokes and cylinders.
- [soft] 2 timing curves available.
- [hard] 1 switch to select timing curve.