6 Pin DC CDI Wiring Diagram
In this post we discuss the circuit for a simple, universal capacitive discharge ignition circuit or a CDI circuit using a standard ignition coil and a solid state SCR based circuit. To initiate the process, earlier we used to have the circuit breaker unit for the required actions. Nowadays the contact-breaker is replaced with a more efficient and long lasting electronic ignition system, called the capacitor discharge ignition system. Basically as the name suggest, ignition system in vehicles refers to the process in which the fuel mixture is ignited for initiating the engine and the drive mechanisms.
This ignition is done through an electrical process by generating high voltage electrical arcs. The above electrical arc is created through extreme high voltage passage across two potentially opposite conductors through the enclosed air gap.
As we all know that for generating high voltages we require some kind of stepping up process, generally done through transformers. As the source voltage available in two wheeler vehicles is from an alternator, may not be powerful enough for the functions.
Therefore the voltage needs to be stepped up many thousand folds in order to reach the desired arcing level. The ignition coil, which is very popular and we all have seen them in our vehicles is especially designed for the above stepping up of the input source voltage.
However the voltage from the alternator cannot be directly fed to the ignition coil because the source may be low in current, therefore we employ a CDI unit or a capacitive discharge unit for collecting and releasing the alternator power in succession in order to make the output compact and high with current. Referring to the above capacitor discharge ignition circuit diagram, we see a simple configuration consisting of a few diodes, resistors, a SCR and a single high voltage capacitor.
The input to the CDI unit is derived from two sources of the alternator. One source is a low voltage around 12 volts while the other input is taken from the relatively high voltage tap of the alternator, generating around a volts. This voltage is stored inside the high voltage capacitor instantaneously. The low 12 voltage signal is applied to the triggering stage and used for triggering the SCR. Now since the SCR is integrated to the ignition primary coil, the released energy from the capacitor is forcibly dumped in the primary winding of the coil.
The action generates a magnetic induction inside the coil and the input from the CDI which is high in current and voltage is further enhanced to extremely high levels at the secondary winding of the coil.
The generated voltage at the secondary of the coil may rise up to the level of many tens of thousands of volts. This output is appropriately arranged across two closely held metal conductors inside the spark plug. The voltage being very high in potential starts arcing across the points of the spark plug, generating the required ignition sparks for the ignition process. The following video clip shows the basic working process of the above explained CDI circuit.
The set up was tested on table, and therefore the trigger voltage is acquired from a 12V 50Hz AC.Each part should be placed and connected with different parts in specific way. If not, the structure will not work as it ought to be. In order to be certain the electrical circuit is constructed correctly, 6 Pin Cdi Box Wiring Diagram is necessary.
How does this diagram assist with circuit construction? The diagram provides visual representation of the electrical arrangement.
However, this diagram is a simplified variant of the structure. This makes the process of building circuit simpler. This diagram gives information of circuit components as well as their own placements. The first element is symbol that indicate electric element from the circuit. A circuit is generally composed by numerous components. Another thing that you will get a circuit diagram would be lines. Lines in the diagram show exactly how every element connects to a another.
The arrangement is also not logical, unlike wiring schematics. Diagram only reveals where to place component in a place relative to other elements within the circuit.
One thing you have to learn before reading a circuit diagram is your symbols. The most common components are capacitor, resistor, and battery. There are also other elements like floor, switch, engine, and inductor.
Sometimes, the wires will cross. Injunction of two wires is generally indicated by black dot on the junction of 2 lines. Colours can also be used to differentiate cables. Usually, there are two chief sorts of circuit links. The very first one is called string connection.
Because of that the electrical current in each and every part is comparable while voltage of this circuit is complete of voltage in every component.Yamaha genuine nos dt dt dt dt cdi unit assy pn. Find great deals on ebay for yamaha dt cdi. Yamaha dt cdi wiring diagram. Yamaha dt is driven by a cc air cooled single 2 stroke reed valve engine combined with 6 speed manual transmission system generating kw hp power at rpm and kmh 65 mph top speed.
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Yamaha ct2 electrical wiring diagram schematic here. It debuted in as a successor of yamaha dt 1. Yamaha dt dt a b electrical wiring diagram schematic here. I cdi magneto cdi unit ignition coil 4 rectifier regulator control unit main switch. Harley davidson fltr flt flht and flhr switched circuit adapter wiring harness.
Circuit diagram bw off 1 cdi magneto cd unit ignition coil control unit main switch engine stop neutral switch. Yamaha dt cdi wiring diagram yamaha dt r question. Wiring connection entire ignition system cdi unit ignition checker. Yamaha dt lc mkii yvps cdi box igniter brain yamaha dt lc3 yvps cdi box igniter. Yamaha dt dt electrical wiring diagram schematic to here. The circuit can be used on other existing ac cdi capacitive discharge ignition motorcycle as long as there is a high voltage generator on the stator.
Wiring Diagram For 3 Way Switch. Led Tube Light Wiring Diagram. For 50cc cc cc pit quad dirt bike atv dune buggy. Yamaha Dt Cdi Wiring Diagram. Dtr Powervalve Help Dtr Forum.This is the ultimate guide to the modern motorcycle CDI unit. Thinking of sourcing a new motorcycle CDI unit? Start with the basics. Skip out the waffle. And find out all that you need to know before making your next purchase. Explanations everyone can understand. Layered into what you need to know.
Wrapping up each principle into an everyday system that does exactly what a motorcycle CDI unit needs to do. Select a tab below to view detailed, technical data about motorcycle CDI units. But they are not all the same. When sourcing a new regulator rectifier there are two essential things to find out first:.
CDI units come in many different formats. The most important thing to remember is that AC input CDI units take their power supply from the engines stator. This is a breakdown of the most commonly used wire colours and what they mean…. Of course, not all manufacturers use these same wire colours. Especially in their wiring looms. It is highly advisable to cross reference your bikes wiring manual.
Alternatively, talk to your local auto-electrician before starting. However, the majority of aftermarket wired CDI units have adopted these same wire colours.
Yamaha Dt 125 Cdi Wiring Diagram
Check out our electrical wiring diagrams for the generic pin layout configuration of each CDI unit connector type. Some manufacturers may design their own components to their own specifications. Therefore, always check the wiring carefully. Although the internal electronics and overall build quality of motorcycle CDI units vary between manufacturers. This is normally supplied from the motorcycles on board 12 Volt battery. This is normally supplied from the motorcycles stator coils.
DC CDI require many more components, so they are larger in size. Use these at your own risk. This is where it gets technical. Timing advance is required in some applications to ensure that the engine runs smooth throughout its rev range. Getting the dimensions right when buying a new CDI unit will save you whole lot of headache when it comes to installation.
Consider these two things:. Just to make sure that it will reach. Unless you plan on crafting your own electrical connections this can make sourcing a replacement rather problematic.We deliver up-to-date correct, authentic data based on evaluation unbiased at no cost to you.
To do this, we display ads from only trusted Partners. To continue on our site, simply turn off your ad blocker and refresh the page. This article describes a home-made CDI unit for Spartamet and Saxonette motor-assisted bicycles mopeds. Having been virtually forced to use a Spartamet to travel between home and work for three weeks, it was noticeable that although the moped ran fine, at full throttle and at top speed 15 mph the ignition began to misfire.
There was a strong suspicion that the higher fuel consumption was related to the misfiring of the ignition; this was confirmed after some further thought and having checked the spark plug and exhaust after several rides.
The ignition starts to skip sparks when the 30 cc two-stroke engine is at full throttle and at top speed. The manufacturer has used this method on purpose to build in an electronic speed limiter to ensure the moped is road legal. However, the carburetor is not limited and it happily continues to deliver the fuel mixture, which ends up unburnt in the exhaust.
There will be more of a carbon build up in the exhaust, which means it has to be replaced sooner. You could, of course, open up the existing CDI Capacitive Discharge Ignition unit and modify it, but since this is completely encased in potting compound this is not something we would recommend.
Instead, we investigated what was required to produce the sparks without limiting the rpm. The result of this can be seen in the schematic shown here. Since the ignition coil and pickup coil are mounted next to the flywheel of the engine we only have to concern ourselves with the electronics that make a capacitor discharge into a coil at just the right moment. The input is connected to a pickup coil that delivers a single pulse for every revolution of the flywheel.
The output is connected to the ignition coil that supplies the high voltage pulse to the spark plug. Capacitor C1 stores the electrical energy and is charged up via D3. When there is a pulse at the input it triggers the thyristor into conduction, which connects C1 to ground so it can discharge into the ignition coil.
That is all there is to it! A single sided PCB has been designed for the circuit the layout can be downloaded from . However, note that the components are mounted on both sides of the board. This was necessary in order to keep the circuit the same size as the original CDI unit.
Its dimensions are 59x38x24 mm. The photos of the prototype make this clearer. You should then solder diode D3 and thyristor TH1 onto the board. The MKP capacitor C1 ends up alongside the board. The varistor VR1 and resistor R1 are then mounted onto the solder side of the board.
And finally you should solder the three spade terminals onto the board. For the enclosure you can use a small box from HammondConrad Electronics part numberalthough an acrylic homemade box cassette or cd case is an alternative. Once the board has been populated and connected you can check if the ignition produces any sparks.
If it all works and the spark plug is sparking happily you can put the circuit in its enclosure and fill it with potting compound. If you fail to do this it is very likely that the circuit will soon stop working properly, since the ignition is subject to quite a lot of vibration.
In both cases the earth is connected to the middle connector of the CDI unit. All you need to do when this happens is to swap the red and blue wires over. When the circuit was installed and put into use the effect was immediately noticeable. The engine runs much smoother at full throttle and it no longer misfires.
The average fuel consumption was also found to have improved considerably to mpg. Your email address will not be published.Most businesses only target happy customers when asking for reviews which leads to biased ratings, so the recommendation software actively tries to identify and not recommend reviews prompted or encouraged by the business. The Business Owner Guidelines section of our Content Guidelines, which are part of our Terms of Service, also makes clear that businesses should not ask for Yelp reviews.
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