RE: Opensource CDI ignition
HI Rob, Thats a good job you did. how did you transfer the degrees to the flywheel? Regards Charlie
Posted on: 3/26/2006 10:22 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=4065699

RE: Opensource CDI ignition
Hi Rob, The Config. with the RC circuit having the resistor goto ground and the cap going to the positive rail,and then the feedback winding going between the resistor and the cap.I also Use a 100ohm resistor between the base of the transistor and the feedback winding as well.For some reason I got the best performance from that set up. I can try to Email you a copy of the schmatic I use if you want. Regards Charlie
Posted on: 3/24/2006 3:55 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=4077606

RE: Opensource CDI ignition
Hi Rob, I have expirenced the same problems in the past and the way I solved it was to decrease the secondary windings and increase the primary windings and then speed up the oscilator.Also that is what led me touse the oscilator configuration I use. It works great up to about 20000 rpm. regards Charlie
Posted on: 3/24/2006 7:20 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=4075952

RE: Opensource CDI ignition
HI Lumpylimpy, You could try to lower the resister value at the RC(Resistor/Capacitor) circuit.
Posted on: 2/18/2006 2:14 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3927749

RE: Opensource CDI ignition
Hi Rob, Your English is Fine.I think you do Pretty Good.Maybe its me that needs to learn to speak Dutch? [:D]. I agree if the cap is too big then it will cause trouble.
Posted on: 2/12/2006 5:17 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3902198

RE: Opensource CDI ignition
Hi Rob, I don't understand why a higher Inverter freq. will lower the RPM.It seems that the HV Cap. will charged with a higher freq.Other factors must be involved.
Posted on: 2/12/2006 2:34 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3901637

RE: Opensource CDI ignition
Hi LumpyLumpy, I use a 1uf cap on my design and I use less windings on the secondary and get more voltage. I get around 400 volts.I do this by increasing the inverter freq. I can pm you or email you a schmatic.
Posted on: 2/11/2006 10:44 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3896825

RE: Opensource CDI ignition
Hi javipallinux, Here is a link to the datasheet. [link]http://www.irf.com/product-info/datasheets/data/ir2153.pdf[/link]
Posted on: 1/26/2006 3:51 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3826411

RE: Opensource CDI ignition
Hi Powerboat, Mount the hall at 36 degrees before TDC.
Posted on: 1/22/2006 12:44 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3809019

RE: Opensource CDI ignition
[quote]ok, but in the orignal circuit the SCR discharge the capacitor on de high voltage cooil , and in this circutit the cooil is exchanged but the irf740. no?? Because is used Q1?????'[/quote] Yes you are right the original circuit dicharged the voltage through the coil.In this circuit the cap is charged and the IRF740 just grounds one side of the coil. you could replace the IRF740 with a SCR.I have done it and its works the same. You can just use a voltage regulator and the original circuit.
Posted on: 1/21/2006 7:07 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3806298

RE: Opensource CDI ignition
[quote] Hi, this circuit dont not work's like CDI?? [/quote] Yes. This is just another version of a CDI. ITs Designed for 12V. Be careful though. with this circuit the sparkplug electrode will shock you with the just the circuit energized.
Posted on: 1/21/2006 6:55 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3806244

RE: Opensource CDI ignition
Hi BigBoat, Thats a Very Neat circuit.Great Job.[8D]
Posted on: 1/21/2006 6:51 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3806230

RE: Opensource CDI ignition
Hi javipallinux, You could probably make this work on 12volts by using a 7508 voltage regulator to drop the 12 volts to 5 volts.I have another circuit that is designed for 12 volts.Here it is.It would be easier to just add the 5 volt voltage regulator.
Posted on: 1/19/2006 5:36 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3794968

RE: Opensource CDI ignition
Hi javipallinux, Take a look at this site. there is lots of great informarion.it should be enough to get you started. [link]http://home.online.no/~jon-mj/cdi_ignition.htm[/link].
Posted on: 1/14/2006 7:08 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3772826

RE: Opensource CDI ignition
Hi Rob, Nice work on the PCB. I like that Coil. Do You get Good RPM from your Engine?
Posted on: 1/8/2006 4:18 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3748158

RE: Opensource CDI ignition
Hi Rob, I can Email you a alternative circuit for the trigger using a SCR where you should 'nt receive any reversevoltage to the Power supply. 740v is a little much . BTW Nice Job on the Boats. 0 degrees? I guess you will have to wait until spring.[:D]
Posted on: 1/8/2006 3:07 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3747897

RE: Opensource CDI ignition
Also I forgot to ask,but Bigboat what type of coil are you using?
Posted on: 1/7/2006 3:48 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3743908

RE: Opensource CDI ignition
Hi BigBoat, Nice Job on the PCBs.Is that transformer from a PC modem?After I wind the transformer I use scotch tape to hold the E cores together and then dip it in Polyurethane. I like all the Boats I guess that where you get your name.[;)]
Posted on: 1/7/2006 3:41 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3743888

RE: Opensource CDI ignition
here are some pics of the transformers I use.
Posted on: 1/1/2006 9:26 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3713533

RE: Opensource CDI ignition
Hi Jon, Great Job on the CDI circuit.How long did it take to wind the toroid?I have made several CDI circuits and found using Ecore transformers a lot easier.:)
Posted on: 12/31/2005 6:58 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3712799

RE: Scratch Built Ignition???
[quote] You will need to go to my gallery to view the coil. [/quote] Where is this Gallery?
Posted on: 5/24/2005 6:49 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=3007613

RE: Scratch Built Ignition???
When I say 3/4x1/2 I mean the outside dementions of the E core.What type of ignition coil do you plan to use?The Length of the wire is not important.pay attention to the Number of turns.Im sure that most people on this Thread have seen this.
Posted on: 5/18/2005 7:44 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2986219

RE: Scratch Built Ignition???
Hi MAtt, This is What I use.#30 Awg for the Secondary,#26 AWG for the Primary and #30AWG for the Feedback. the size of the transformer is 3/4X 1/2
Posted on: 5/17/2005 4:19 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2982872

RE: Scratch Built Ignition???
Hi Zagnut, I am currently using CH coils.To get a good spark you need at least 350 to 400 Volts.At least in my experiments anyway.
Posted on: 5/17/2005 5:45 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2982867

RE: Scratch Built Ignition???
Zagnut, where do you get your coils?I use the Voltage doubler because I use CH ingnition coils.I need around 400 volts.I will try to post pics as soon as I can.
Posted on: 5/15/2005 6:57 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2977808

RE: Scratch Built Ignition???
Hi Zagnut, [quote] will this type of transformer work good with the simple oscillator circuit the RCM ignition uses? or does it need something more complicated like the 3W ignition that has a pair of transistors and a bunch of other crap? any way to calculate the frequency according to the component values used? [/quote] Yes! It works great.Better than a Torroid in my opinion.I added to the RCM version and what I ended up with is Better.The transformer has 250turns on the sec,8 turns on the FeedBack,and 16 Turns on the Primary.The output of the SEC one leg goes to ground and the other goes through a Voltage doubler.I get 400 volts.Idon't know how to calculate the Freq.But I play with the values of the Resistors until I get the Right voltage.
Posted on: 5/15/2005 4:52 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2977426

RE: Scratch Built Ignition???
They go on the Bobbin.Not Shown.These are what I use and they work Great.I Take the Bobbin and drill a hole at each corner(4) for the wire to come through. I start out with the secondary.Ithread the Start side through a Predrilled hole.Lop the end through twice to keep the wire in place.I hae made a turn counter and I count the turns.When Finished I cut the wire off the spool and loop it through the adjacent hole.Then I turn the bobbin around and do the Primary.Then the Feed back.Pay attention the the start side of the feed back and the Primary.All the turns thave to go in the same direction.When finished I add the E cores and use varnish the hold everything together.The whole process takes Me about 30 min.
Posted on: 5/15/2005 6:42 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2976079

RE: Scratch Built Ignition???
I Don't believe the they will work.They don't have the circuit the boost the voltage.
Posted on: 9/8/2004 8:56 PM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2158742

RE: Scratch Built Ignition???
Hi everyone, I have 2 HV boards for sell 25$ plus shipping in US. contact me at charliem@sc.rr.com
Posted on: 8/25/2004 5:48 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=2116261

RE: Scratch Built Ignition???
To anyone interested,I Have Transformers For the Cd ignition for sale.The price is 15+ shipping in the US.The Transformer is a Bobbin and E-core design.It is wound to produce around 400 volts.The dimensions are 9/16sq x 1/2. You can reply to me At charliem@sc.rr.com
Posted on: 7/4/2004 7:25 AM by Author "c_moore" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=1959516