This circuit turns an AC-CDI into a DC-CDI.
An AC-CDI needs a working STATOR to charge. If the stator fails, let it be rewind or buy a new one is pretty expensive!
This circuit was designed to bypass the faulty stator by making High Voltage (around 100 to 200V) directly from the +12v battery.
When the internal SCR of the AC-CDI has been latched in ON state for a spark, only the voltage crossing a falling zero will turn it OFF again. In order to let the SCR return to blocking state, this circuit alternates ON and OFF states.
- 50 to 20,000 RPM
- Kill switch
- Power supply voltage DC 12 volts
- Current drain: 60mA to 1.3A
- 2A Fuse Protection
- Common ground between 12Vdc and HV
- Dimensions: 75 x 50 x 25mm (3 x 2 x 1 inch)
- Available Ready to use in the SHOP section.
- or as separated parts: PCB plus Firmware
FRQ solder pad:
If open (default): Frequency of the circuit is 1000Hz (equal to 6 pulses/rotation at 10000RPM)
If close: Frequency of the circuit is 500Hz (equal to 3 pulses/rotation at 10000RPM)
PWM solder pad:
If open(default): HV generator alternate ON/OFF period at 50% (Maximum output voltage = +220Vdc)
If close: HV generator alternate ON/OFF period at 33% (Maximum output voltage = +140Vdc)
Remove the KILL wire from the ACCDI and connect the Kill Switch to this Power module
If Kill input is connected to Ground: DC generator stops and Led turns ON.
Over Voltage Protection: Turn the trimmer to adjust the maximum output voltage from +100v until +220v.
Led turns ON when OVP (aka regulation) is active.
Transistors need heatsinks if this unit run at 15000rpm longer then 1 minute.
VIDEOS.Click here for more info
- Version V1R2C1:
- First Version.
- Version V2R0C0:
- [soft] Improvements.
- Version V2R0C1:
- [hard] Change PCB layout.
- [soft] 2 PWM DutyCycles.