SPARKY-1 & SPARKY-1E: A 5 VOLT HIGH VOLTAGE BOARD FOR CDI IGNITIONS
Sparky-1 was designed to be used with the open source project Programmable Open Source CD Ignition PIC1840 located on the RC Groups forum but it will work with almost any widely used signal input. In today's age of electronics I don't feel it should be necessary to wind a step-up coil. I also don't really like ZVS , ZCD or Royer oscillator circuits because they are hard to control, so I used something I know SMPS (Switch Mode Power Supply) technology. With SMPS I can use almost any step-up transformer I want, limit the voltage, and power. Sparky-1E is designed to use an external ignition coil like the Zenoah Grey Coil or the GY6 scooter coil.
I designed the Sparky-1 to be as flexible as possible and I also wanted it to be designed so that it could be easily understood. Another major feature was that it had to run the whole circuit with 5 volts. For detailed description of how the circuit works read the circuit description PDF located below. Sparky-1 is free to use for personal use only, commercial use with a written license agreement.
The main features of Sparky-1/1E:
- Fully programmable ignition curve.
- Whole circuit runs off 5.0 volts.
- Use >5.9 volt to 18 volt battery power.
- Adjustable high voltage output with feedback circuit.
- Adjustable power output use only as much as you need and save battery power.
- Adjustable frequency to match transformer uH and inductive reactance (XL).
- Half-bridge driver cuts out when battery voltage goes down to 5.5 volts.
- No complicated circuits, excellent way to learn SMPS and CDI ignitions.
Batteries you can use:
Use a 500maH or greater battery, the circuit will draw a max of 500ma. I use a regulator so you can use 6 - 18 volt NiCad, NiMH, Lithium Ion / Poly / LiFe but, you should use a volt monitor so you don't wreck the batteries. A battery voltage as close to 6.0 volts is best to reduce heating of the regulator but, with higher voltage & maH you can fly longer (hours) before recharging. The regulator is a surface mount device and is a LDO (Low Drop Out) linear regulator.
Any question just email me rrichter@unimatrixtech.com.
Sparky-1 Files:
Sparky-1 Circuit Description.pdf A detailed description of how the circuit works.
Sparky-1 CDI HV Schematic IR2302-NE555.pdf PDF of schematic.
Sparky-1 Eagle File CDI HV Schematic IR2302-NE555.sch Eagle file of schematic so you can make changes.
Sparky-1 Eagle File CDI HV Board IR2302-NE555.brd Eagle file of board so you can make changes.
BOTTOM LAYER POUR Sparky-1 CDI HV Board IR2302-NE555.pdf Bottom board layer with copper pour.
BOTTOM LAYER Sparky-1 CDI HV Board IR2302-NE555.pdf Bottom board layer without copper pour.
TOP LAYER POUR Sparky-1 CDI HV Board IR2302-NE555.pdf Top board layer with copper pour.
TOP LAYER Sparky-1 CDI HV Board IR2302-NE555.pdf Top board layer without copper pour.
Combined Layers Sparky-1 CDI HV Board IR2302-NE555.pdf Combined layers 3X enlarged.
Component Layout Sparky-1 CDI HV Board IR2302-NE555.pdf Components only layer.
Sparky-1 BOM CDI HV Schematic IR2302-NE555.pdf PDF of Bill Of Materials.
Sparky-1 BOM.xls Bill Of Materials in Excel 97-2003 format
Sparky-1 files.zip All the files zipped into 1 compressed file.
Sparky-1E (External coil) Files:
Sparky-1E Circuit Description.pdf Same as Sparky-1.
Sparky-1E Eagle File CDI HV Board External Ignition Coil.brd Eagle file of board so you can make changes.
Sparky-1E Eagle File CDI HV Schematic External Ignition Coil.sch Eagle file of schematic so you can make changes.
Sparky-1E CDI HV Schematic External Ignition Coil.pdf PDF of schematic.
Sparky-1E NO FILL BOTTOM.pdf Bottom board layer without copper pour.
Sparky-1E NO FILL TOP.pdf Top board layer without copper pour.
Sparky-1E POUR FILL BOTTOM.pdf Bottom board layer with copper pour.
Sparky-1E POUR FILL TOP.pdf Bottom board layer with copper pour.
Sparky-1E files.zip All the files zipped into 1 compressed file
Sparky-1 BOM.xls Bill Of Materials in Excel 97-2003 format, just delete the RT-442 coil
BOM Sparky-1 1E CDI HV Schematic IR2302-NE555.txt Bill Of Materials in TEXT format, just delete the RT-442 coil
Movies of Sparky-1:
Sparky-1 Movie 4 - Hits 37,200 RPM
Sparky-1 Movie 5 - Very Low Power Usage
Sparky-1 Movie 6 - Big Sparks Cool
Inductive reactance Adjust for Power
