Design to simulate pickup at different RPM to test TCI, ACCDI, DCCDI, Tachometers, Power valves and ignition coils and to extract the advance curve from a Digital TCI or CDI.
This tester intend to be used to check CDI or TCI on a bench. It simulates a pickup and can also more or less simulate an exciter that load the CDI under test.

CDI/TCI analyzer is designed to test cdi or tci on a bench.
It simulates voltage for pickup and for charging coil (in case of accdi) detect the spark and then display the timing.




The simulated pickup signal is 40Vpp (+20v to -20v) or can be reduced to 15Vpp (+7v -7v) with jumper N°2.
(Output current : +700mA and -300mA)
If the CDI/TCI pickup input is highly capacitive, (example at 24.000rpm) use jumper N°1 (L for Load) to connect a pull down resistor on the circuit to sharpen the signal. (Same signal at 24.000rpm with Load)


sw 6: ON = First pulse is Positive
sw 5: ON = Second pulse is Negative
sw 4: ON = First pulse is Negative
sw 3: ON = Second pulse is Positive

To put it differently:

Jumpers ON:
4 + 3: NP
6 + 5: PN
6 : P
4 : N


The most advanced feature!

  • With the help of a Capacitive Probe or a wire winded up around the sparkplug wire, this tester can measure the time that goes by between the makeup pickup and the spark then display the advance timing of the TCI/CDI under test.
    To test an ACCDI you will need an external High Voltage power supply.
  • During extraction, Advance timing is send on live to a PC in CSV format via Serial USB at 115200-N-8-1
  • Detect RPM limiter (No Spark detected = no Advance displayed)
  • Can test Digital CDI/TCI (Electronic ignitions with processor inside.)
  • CANNOT test analog CDI like GY6 or my ACCDI v2.6, v2.7 (Because there is no processor inside, just a bunch of resistors and capacitors so the advance timing comes mainly from the voltage of the VR that shift a bit when RPM increase.)
  • Better accuracy is reached when WIDth is set to “0“.


ACCDIs need a charging coil that provide 100 to 300Volts.
An optional HV source driven by this Tester is available here.

  • Range 1000 to 14,000RPM
  • Output voltage manually adjustable from 110 to 280Vdc
  • Output Power: 15W
  • Input: 12Vdc/4A

You can simply use the main power toward a isolation transformer (Wiring) but keep in mind the main frequency will highly limit the RPM ! (50Hz = 3000rpm max, 60Hz = 3600rpm max)


Bill Of Material


Click here for more info


  • How a pickup works?


    • Version v6r2c0:
      • [hard] Scope removed
      • [hard] Potentiometer replaced by Push buttons
      • [Soft] Current consumption reduced.

2 thoughts on “CDI/TCI TESTER v6.2”

  1. Quisiera adquirir este producto con la fuente de alimentación AC.
    Me encuentro en Colombia.
    Agradezco su pronta respuesta.

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