CDI Capacitor Discharge Ignition Circuit Demo

CDI Capacitor Discharge Ignition Circuit Demo

[@jgmo53]

Sure wish I had this when I was a mechanic's instructor. This is one of the most concise, well conceived and presented little video "vignettes" on this subject I have ever seen. WELL DONE SIR! Thank YOU!

[@AllAmericanFiveRadio]

Thanks Jim Dixon

[@bmck9097]

Excellent video, thank you for taking the time to do this. I now completely understand how this system works. My 50 HP merc outboard uses this system.

[@IdeasMan101]

thank you very much for such a clear concise description of how the scr based cdi works.

[@whydahell3816]

Glad you made this. Learning all the components and their contributions is hard enough but seeing any changes in a real time model, greatly helps

[@AllAmericanFiveRadio]

I'm glad you found this video useful. Thank you, and your welcome.

[@spideychad4901]

Ha, brilliant! My mechanic just said my boat needed a trigger today, so when I found your video, it explained EXACTLY the info I wanted to understand. Kudos to you sir!!!!

[@AllAmericanFiveRadio]

Thanks

[@fernandoramirez-dp5jx]

This is the best explanation i have seen so far. Thanks

[@januarioqueiroz3122]

...and even his voice is so pleasant, a calm voice that is good to be heard!

[@harryohanson]

Such an awesome job! I am very visual learner and I’ll be watching this repeatedly. Thank you!!!

[@AllAmericanFiveRadio]

I'm glad this video is helping. THANKS!

[@landlordhan9148]

an excellent explanation. thank you. I had no idead what vehicle ignition was until yesterday, but watching this video, I can totally comprehend what vehicle ignition is and how CDI works.

[@AllAmericanFiveRadio]

THANKS

[@JoelArseneaultYouTube]

Great explanation ! I envy your ability to simplify this to the point where anyone could understand... even after watching your video, I couldn't explain it so clearly. I get so caught up on details... I'd go off on a rant about timing advance curves, 2 cycle vs 4 cycle, coil fed vs battery fed ... and I'd walk frustrated and with the other person more confused than when I started.

[@AllAmericanFiveRadio]

Thanks for your comment.

[@W1RMD]

I normally watch your radio videos. My 1984 Honda "Big Red" stopped running. What a pleasant surprise to find YOUR video covering this! Great job as always. The Big Red is running now, by the way. Thanks again my friend!

[@AllAmericanFiveRadio]

Thanks. I'm glad this video helped.

[@windsurfer3329]

I have been teaching electronics at a local university, and will recommend my students to watch this video even though we don't go into power electronics. This is an excellent video describing the basics of a CDI system. There is supposed to be a signal conditioning circuit in the pulse rotator path that terminates at the SCR gate; its main function is to clean/filter the spikes from the triggering mechanism. All in all your explanation is very clear, and concise. Thanks for uploading the video.

[@AllAmericanFiveRadio]

Thank you. I'm glad you find this video worthwhile watching and useful, and hope your students will also.

[@gmaclaren]

Excellent description. Just what I was looking for. It's difficult for me to comprehend how my new CDI distributor on my 1974 Ford 302 V-8 manages to "trigger" with the components I see withing the distributor cap. Not that it makes an difference, but mine is a marine application. Thank you very much for the description.

[@peterjuhasz5143]

Thank You for this demonstration, everything was clear and understandable! Great job!

[@AllAmericanFiveRadio]

Thank you!

[@tellmesomething2go]

Very nice of you. The best compliment. " I got it ".Thank you.

[@MrJAG1156]

Good video, excellent visualization. Thank you

[@AllAmericanFiveRadio]

Thanks

[@DangarMarine]

Thank you for your explanation.

[@n1chp]

Rich, Great information. This helps to understand various components. Now it also helps to see how the function in a radio or any other device. 73, Mike

[@georgechambless2719]

This is how my Honda Rebel 250 ignition system works. Thank you for the visual explanation!

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@HavokTheorem]

Highly invaluable video, I saved a lot of time and money making my own CDI circuit from basically exactly this schematic for a 125cc dirt bike. 100ohm resistor, 1n4007 diodes, 1uf 250v cap and a BT169D thyristor.

[@pedrookra]

Hi good work frank this project, I need to make this CDI of my dirt bike he is a suzuki rm 125 92 you know its work on my motorcycle? send me a e-mail please i realy need this project help me please, sende from: [e-mail]

[@AllAmericanFiveRadio]

Usually the capacitor is the part that fails first.

[@pedrookra]

HI All American Five today I opened an original dirt bike CDI, I can see to have a 250v orange capacitor, I am from Brazil, but I did not think to buy this cdi here and when I thought it was very expensive 450 500 $ How Do I understand enough of electronics to make my own cdi

[@AllAmericanFiveRadio]

I'm glad the video helped

[@pedrookra]

Do you believe this circuit meets my dirt bike? because shee reaches 11 000 rpm two stroke power monocylinder

[@donovanlucibello379]

Wow, what a gift this video is to me. Great explanation, thank you!

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@riv1950]

Very very good video and good description, thank you so much

[@joerossi43]

I have been trying to learn and diagnose a small engine with no spark. these type videos are great ! Im almost amazed at the effort people put into these videos and the value that we all can get out of them. Im no engine or electronics expert but i know enough to fix some things and other times royally ruin things. I might be totally wrong but it doesn't make sense to me that the ignition's primary coil is grounded directly. I figured it would get the solid ground thru the gate(SCR/transistor or whatever it is)

[@johnkoury1116]

Yes even 8 years later. fantastic!!

[@protickchakraborty]

How to use eliminate,

[@protickchakraborty]

And ,did you know how to create a klin spark ignition for ceramic factory

[@AllAmericanFiveRadio]

Thanks Daniel, I've been busy working on a 50,000 Watt transmitter. Both three-phase circuit breakers failed. The station was off the air since Wednesday afternoon, got the parts in today and she's back on the air. Glad the video was helpful. Rick

[@ronbarbi2008]

Great video on operation........Thanks for the explanation!

[@harrykuncoro5218]

Thank you, with the video simulator above, I came to understand how the CDI works.

[@AllAmericanFiveRadio]

Thanks

[@acestudioscouk-Ace-G0ACE]

You have a great way of explaning things, thank-you.

[@AllAmericanFiveRadio]

Thanks you, and your welcome.

[@tryhardtkm1248]

Thanks for clarifying how it works. This helps me a lot

[@AllAmericanFiveRadio]

Glad it helped. Thanks, and your welcome.

[@sivucit]

Thanks Rick for uploading this video,, little bit of insight for others. Pulse coil is the one which would trigger when piston comes to top dead center in motor bikes. IN four stroke engine, u have intake(getting GA), compression(compress the GAS), spark(spark the compressed gas) and exhaust as four events, u want to spark the engine at the top of compression stroke, pulse coil will provide pulse exactly at that stage.. In Cars Transistor is used to pulse the coil ground and power is steady

[@PichulinTube]

Crystal clear explanation. Thank you very much!

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@santhoshd3523]

Good explanation, i've ever seen... Thank you

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@SpkStephen]

Great video!! I am going share this with my son.

[@ExplosiveAnyThing]

I would like to add a note here, because it seems some people having trouble understanding it. Not all cdi's have this excitor coil, some old cdi's have that. Most of them nowdays have an inverter build in. These kinds of cdi's gets their power directly from the battery.

[@andrewgardner7104]

Excellent explanation, thanks for your time and effort.

[@AllAmericanFiveRadio]

Thanks

[@hansotimunda]

Very nicely explained, cct done in a very simple manner, easily understood. This gentleman should do more projects ! Good teacher!

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@giovannibrazzoli7596]

Very clear explanation , Thanx for the video loved it

[@Pwaak]

Great video and explanation! Thank You!

[@bobmccluskey6796]

Very nice illustration. THANKS!

[@AllAmericanFiveRadio]

Thanks, and your welcome.

[@tunicana]

Very clear explanation Rick.Thx a lot

[@aqeelkhan353]

appreciate it....great demonstration....keep up the good work :-)

[@AllAmericanFiveRadio]

Thanks

[@rockiemountin7535]

Great video very clear and to the point with easy to understand illustration thank you sir👍

[@AllAmericanFiveRadio]

Thanks

[@cristianpopescu78]

The Best Video on KZbin !

[@AllAmericanFiveRadio]

THANK YOU!

[@recips87]

Very informative, thanks very much!

[@MickeyD2012]

FANTASTIC explanation.

[@AllAmericanFiveRadio]

Thanks

[@ver64]

Nice circuit animation....thanks Rick.

[@krisea3807]

Excellent video to understand how CDI functions along with magneto coil and spark plug.

[@AllAmericanFiveRadio]

Thanks

[@michaelshansen7070]

Great job, thanks AllAmericanFiveRadio!

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@danielwoodhouse1870]

Very helpful for my training! Thanks!

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@techdavey3486]

An excellent video and description.

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@bvnj123]

Great explanation, thank you. Just for reference SCR stands for Silicon Controlled Rectifier.

[@AllAmericanFiveRadio]

Thanks

[@obtron]

simple and straight to the point, thanks

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@can-cruiser]

excellent video. Thanks for posting and sharing. Cheers

[@AllAmericanFiveRadio]

Thanks

[@tellmesomething2go]

VERY NICE. VERY UNDERSTANDABLE. THANK YOU.

[@Mushketer888]

WOOOOW big thanks! very useful information

[@steveblayer342]

What a great explanation ,Thank you.

[@AllAmericanFiveRadio]

Thanks, and your welcome.

[@ProjectRedfoot]

Thank you! This is very helpful!

[@AllAmericanFiveRadio]

Thanks

[@bennydwars8507]

This explanation is really perfect

[@AllAmericanFiveRadio]

Thanks. Your welcome.

[@RoobieRoo2]

Kind Sir thank you so much, super clear and very well explained.

[@AllAmericanFiveRadio]

Thank you, hope this video helps.

[@brianb5779]

Finally a full understanding,,thank you sir.

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@Scootersnmore]

Cool video Interesting to know how it really works animated . Since i work on this stuff everyday for the past 30 years as a Motorcycle / AtV Mechanic

[@AllAmericanFiveRadio]

Thanks

[@aurelianstanciu1497]

Thank You for explanations!

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@AllAmericanFiveRadio]

Thanks Tony T.

[@kayinkk2011]

THANKS FOR THE CLEAR EXPLANATION

[@AllAmericanFiveRadio]

Thanks

[@bonneygajadar4107]

excellent demo!!

[@AllAmericanFiveRadio]

Thanks

[@eddyaudio]

Great demonstration Rick regards Ian VK2IJ.

[@amikhimji]

Great video thanks

[@stigveijalainen]

Thank you for the informative program.

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@passtranelectronics]

excelente explicacion amigo saludos amigo

[@AllAmericanFiveRadio]

Thanks

[@mu86neer]

Thank u so much for this video.

[@AllAmericanFiveRadio]

Thanks

[@190055joe]

I put a CDI system in a Ford 4 cylinder Cortina many years ago and straight away noticed more power and better idling , except one night i noticed that the engine was idling roughly when I opened the hood it looked like a Xmas tree, sparks leaking from all over the spark plug leads .The higher induced voltages must of been to much for the leads , the simple solution then was to buy HV insulating sleeve and install the leads inside.

[@AllAmericanFiveRadio]

+190055joe THANKS

[@willyd4850]

Thanks so much for the great explanation sir.

[@AllAmericanFiveRadio]

Your welcome

[@telosfd]

Thank's for the tutorial.

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@gtaagente]

Thats a analogic CDI, today we use DIGITAL CDI , always good video very clean diagram!

[@AllAmericanFiveRadio]

Send me a diagram of a digital CDI. Thanks.

[@RCLaROCK1]

well done sir thank you.....

[@AllAmericanFiveRadio]

Thanks AntiqueRadioandTV

[@petershearer1232]

great video thank you!

[@AllAmericanFiveRadio]

Thanks

[@spymaine89]

excellent. i will need to re-follow , to understand. thank you

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@blancolirio]

Great job! did you put all this animation together too?

[@AllAmericanFiveRadio]

Yes

[@blancolirio]

Excellent! I will use your video for reference when I get to this subject on motorcycle electrical systems. This is the quality of tutorial I remember from Airframe and Powerplant mechanics school years ago. (Mostly great quality WWII training films). JB

[@duncanjaxson8422]

You prolly dont give a shit but does anybody know a method to get back into an instagram account..? I somehow lost the account password. I appreciate any tricks you can offer me.

[@kasejayden9388]

@Duncan Jaxson Instablaster ;)

[@duncanjaxson8422]

@Kase Jayden thanks so much for your reply. I got to the site through google and I'm in the hacking process now. Seems to take quite some time so I will reply here later when my account password hopefully is recovered.

[@markflierl1624]

That was a great video.

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@tectalabyss]

Very interesting video. Thank you for sharing. Take care. Bobby

[@pmbat21]

Thanks, now I understand

[@bo-shianchen5712]

its easy to understanding,thanks~

[@AllAmericanFiveRadio]

Thanks

[@TheJoew19972]

the silicone rectifier or SCR is a electric one way gate that's controlled by the pulsar coil.

[@marcojorge8044]

Muy claro, gracias. ( Very clear, thanks)

[@AllAmericanFiveRadio]

Thank you, and your welcome. Hope this video helps.

[@andyvh1959]

GREAT description of how a CDI works, easy to understand. I need to build a CDI for a motorcycle engine that uses two trigger coils. One at 10 BDTC and another at 35 BTDC. I assume I'd duplicate the SCR to the trigger circuit. But how would it "switch" to the 35 BTDC trigger as the engine speeds up? I need the advance to occur before 2,500 rpm.

[@renatoyumang8636]

thanks the best explanation now I understand 👍

[@AllAmericanFiveRadio]

Thanks

[@vitalik3273]

Гарна робота!!!

[@AllAmericanFiveRadio]

Thanks and your welcome.

[@AllAmericanFiveRadio]

Thanks Giovanni Brazzoli

[@thomaslanik7215]

Excellent, especially with the "animation"!

[@AllAmericanFiveRadio]

Thanks

[@hanskarl2215]

excellent. thanks!

[@AllAmericanFiveRadio]

Thanks

[@hendrionodede]

Thanks for explaining

[@bijayabaidya6896]

Very well explained, thanks

[@AllAmericanFiveRadio]

Thanks.

[@AllAmericanFiveRadio]

Thanks Ilja Lebedev

[@nonsuchsame6902]

Thanks for giving this

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@chrisparry1232]

Brilliant. Got it. Thanks.

[@AllAmericanFiveRadio]

Thank you, and your welcome.

[@AllAmericanFiveRadio]

Thanks SpkStephen

[@sivucit]

yes modern car have Cam sensor(provides which cylinder is top), and crank sensor(provides whether cylinder is approaching top dead or not) is fed to ECM/PCM, then PCM will send pulse signal to ICM(igniter) which will momentarily supply ground(using transistor switch on / off) to the ground side of the coil, note positive is 12 volt connected all the time, this makes a spark..

[@barn5923]

thanks very much.good video.

[@AllAmericanFiveRadio]

Thanks Darryl Planck

[@BlueMax333]

excellent! thank you

[@AllAmericanFiveRadio]

Thanks

[@47f0]

Interesting. I was trying to figure out an Amazon review for a small engine accessory coil to provide 12 volts for gas engine bicycle lighting. This reviewer said that just adding the aftermarket coil (approx 180 degrees from the ignition charge coil) kept his engine from running more than 3,000 rpm. We used to do this exact trick with old Ducati and other euro "scrambler" dirt bikes that only had one magneto coil so we could get some lighting, and it was never a problem. Of course, those were the days of separate spark coils with contact breaker points (and incandescent lights that didn't care about the non-rectified AC pulse from the lighting coil), but still, I'm having a hard time understanding how adding another coil would possibly have any affect on the CDI system. The aftermarket coil is grounded to the engine and has one power lead coming from the other end of the coil, so both the ignition coil and the aftermarket lighting coil share the engine block as a ground - but that shouldn't be an issue... should it? Strange, eh?

[@AllAmericanFiveRadio]

T would need to see the circuit.

[@AIRMANBEAR]

GREAT VIDEO

[@AllAmericanFiveRadio]

Thanks

[@AllAmericanFiveRadio]

Thanks DENNIS N