RE: CDI gr8flyer55
Jake, If the circuit is a stable version, I can probably help with the pc board drawing. Not familiar with Eagle but downloaded a version yesterday to take a look at it. Still need to know answer to my previous question in #317.
Posted on: 9/17/2012 2:18 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11231457

RE: CDI gr8flyer55
Quick question on the circuit diagram. There is an additional diode (obvious) but what is the red square around the 2 diodes in BR1 all about..??
Posted on: 9/17/2012 2:23 AM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11230760

RE: CDI gr8flyer55
I go to the link Jake showed in post#244 but it just leads to pdf files , cannot see any download for the xc compiler. http://www.microchip.com/pagehandler/en_us/promo/mplabxc/
Posted on: 9/14/2012 4:31 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11228725

RE: CDI gr8flyer55
Link to IDE version 8.87 http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en019469
Posted on: 9/14/2012 4:03 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11228704

RE: another darn ryobi post (ryobi performance modification, analysis and comparison)
[quote]ORIGINAL: av8tor1977 But man, I NEVER stay in front of an engine I am revving. I can't wait to get behind that prop once the engine starts.... Please be careful. No offense intended, but I have seen props fly off, break, etc. and I don't want to see someone get hurt by one. Sometimes an engine ''blows'' and the sudden stoppage will spin that prop off so fast you can't believe it..... And sometimes Ryobis will ''throw a rod''. AV8TOR [/quote] We tried to get the "powers-that-be" down in Aus here to see the same dangers. They insisted on the "prop to the crowd" approach because of the smoke and fumes and extra noise from the reving engines. ...mmmmm... Thankfully it was changed later so one had to go to a safety section where neither such problems faced the crowd.
Posted on: 8/25/2012 4:40 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11205894

RE: CDI Summary (The New, New CDI Thread)
[quote]ORIGINAL: Gompy Ask Howie, http://www.rcuniverse.com/community/profile.cfm?section=profile&forum=1&memid=41842 [/quote] I thought we might get some answers here. So for those who might wonder what this is about, I contacted Howie who simply said he is using the same person who wrote Gompys code to do some work for him. He has not built the ignition, nor does he have any plans to do so.
Posted on: 8/22/2012 4:48 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11202611

RE: Header parts for home made??
When using copper, the constant heat-up and slow cool-down cycle "work hardens" it and makes it crack under vibration.
Posted on: 8/14/2012 6:21 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11193709

RE: Walbro midrange adjustment
Changes in pop-off pressure only changes adjustment needle sensitivity. Increase pressure, needles need less adjustment to effect a change and visa-versa. Usually set to about 2lb but difficult set precisely without the right guage.
Posted on: 8/13/2012 5:44 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11192294

RE: Porting work on a 20cc.
150 is ok. I've seen some at 170 but changes to induction timing required. If reed valve or rear rotary valve then a bit easier. Maybe just add a tuned pipe. Pretty much guarantee an increase then. Pipe designer here............. http://www.mh-aerotools.de/airfoils/javapipe_en.htm may have to "bend it around" a bit to fit your aircraft though. [:D]
Posted on: 8/12/2012 5:08 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11190823

RE: CDI gr8flyer55
Sorry...... currently in a part of the world where downloading is very slow to say the least.
Posted on: 8/8/2012 1:17 AM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11185221

RE: CDI gr8flyer55
Jake, I use the Oshon Pic simulator IDE. Maybe no pretty graphics but as far as infomation gathering goes, I think it is hard to beat. I've been told that Nyemi uses the same. Send over a pm and I'll email to you if you like.
Posted on: 8/7/2012 11:31 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11185185

RE: CDI gr8flyer55
[quote]ORIGINAL: jakestew @bluejets: thanks for the code comments, I'm just not sure what's going on with the simulator.  I must have something set wrong somewhere.  I'm stepping through the code and it shows the pin high, just doesn't seem to work.  Maybe it has different default SFRs in the simulator and thinks the pins are setup differently somehow. I'll see
Posted on: 8/7/2012 6:44 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11184933

RE: CDI gr8flyer55
[quote]ORIGINAL: jakestew I'm trying to simulate the timer circuit in Proteus.  I've run into the problem that the code seems to get stuck waiting for GP2 to go high, even though it is going high from the simulated pulse generator. I've tried compiling in MPLAB X with MASM and also tried loading the compiled hex files from Nyemi. Anyone have any ideas what could be causing it?  (besides the foolishness of simulating a circuit that I have sitting in front of me DOH!) It keeps looping here... Label_0003  BTFSC   GPIO      , GP2     ;BTFSC = wait for high pulse on Hall switch (-_+).             GOTO    Label_0002          ;BTFSS = wait for low pulse on Hall switch (+_-)  Alterable!!             MOVLW   0x01             MOVWF   0x24             GOTO    Label_0003  [/quote] Label_0003 BTFSC GPIO , GP2 ;waiting for a high from pin 5=hall effect input GOTO Label_0002 ;if high, goto Label_0002 MOVLW 0x01 ; MOVWF 0x24 ;if still low then put 1 into W and add W to hall effect register GOTO Label_0003 ;and go back to Label_0003 Maybe your pulse generator is not high at the time the code samples GP2.
Posted on: 8/7/2012 6:53 AM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11184090

RE: CDI gr8flyer55
[quote]ORIGINAL: nyemi I'm just watching. <span lang=''en'' id=''result_box''>Idea rain.<img src=''http://www.rcuniverse.com/forum/js/fckeditor/editor/images/smiley/msn/thumbs_up.gif'' alt='''' /> <span lang=''en'' class=''short_text'' id=''result_box''>Everything can be solved. I love RC Universe forum<img src=''http://www.rcuniverse.com/forum/js/fckeditor/editor/images/smiley/msn/tounge_smile.gif'' alt='''' /> [/quote] I like your confidence.[8D] BTW did you get pm I sent..? Maybe no time yet for reply.
Posted on: 8/6/2012 7:13 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11183589

RE: Complete new CDI - website open
Dzik, Welcome to the club of those who have had the same problem. If you read my post above (and posts from others) you will find we have all had the same result. As far as I am aware, the problem was never resolved. What you can try is as I did, re-program the chip, and it may be ok initially but it will fail again after a very short time. I had one chip that did not recover. Source code was never released so no one can check to see if the problem lies there or not. All the above is the reason why John and Nyemi decided to start the new ignition with the 12F683 chip which works fine. Read the complete section as there were a couple of initial teething problems. http://www.rcuniverse.com/forum/m_10662258/tm.htm There is currently a move to change the "working ok" system to multispark and also telemetry tx but this is in a new section. Best to read all. Don't know if Gompy would care to comment as many of us have respect for his efforts and any help he might forward.
Posted on: 8/5/2012 7:05 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11182299

RE: CDI gr8flyer55
Theory is fine but I think you would have problems getting enough energy into the capacitor in such a short time. John, You mention increased program speed but I'm pretty sure it's still the same, just added the 3 loops from what I can see.
Posted on: 8/2/2012 6:01 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11179102

RE: CDI gr8flyer55
If you get in touch with John (GR8flyer55) he can point you in the right direction. Nyemi has just done a revamp of the program to give multiple sparks which John says is working great.
Posted on: 8/1/2012 6:31 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11177823

RE: Bike engine for my 1/3 scale Sopwith pup
A quick google search showed the engine as 66/80cc, I can only imagine actual/calculated. Also weight is 24lb and rating is 2.75 hp although this always tends to be a reading way above the rev range that is achievable in practise. Another search on utube showed the engine about average for usuable revs but it would be a suck-it-and-see situation. Probably not a problem with a slow flying pup. Seemed slow to accelerate though so maybe not a powerhouse. Barking dogs are apparently not good for performance either.[:D] http://www.youtube.com/watch?v=5wG1Y1ct9tg
Posted on: 7/25/2012 6:39 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11169390

RE: CDI Summary (The New, New CDI Thread)
John, I think it started out as a summary of links and a proposal to change the existing chip program to accomodate some telemetry system this bloke has come up with. I believe he decided to make changes first and read the existing program second, which is why I said the program from Nymie needed close scrutiny and full understanding before any changes were made. The point from me was, the ignition is working fine now on a 12F683 so if telemetry is required it could be tagged on with another chip and an additional pc board if one requires telemetry. However, i think there will be a determined effort to try to modify this working program and make additions to fit everything into one chip. Beats me why. Alter the program, change the chip, change the layout,new pc board = new project. As I said. chips are cheap, system from John already works fine ( and we know how difficult it has been to achieve this) So, as to your question, I believe it will be a completely new system.
Posted on: 7/25/2012 5:48 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11169292

RE: CDI Summary (The New, New CDI Thread)
Hi John, Yes. been a while now. Due to go back to Aus and my workshop which I miss very much, about 4 weeks from now. Only thinking the other day about dropping you an email. Fine to make a Tx from your led output, already there. My concern would be that making changes to the program with additional outputs looking at program parameters or any interrupts may well interfere with the primary objective of the program which is to monitor the speed, do the look-up and fire the plug at the correct time. As he said, chips are cheap so I'd be setting up a second micro to do any Tx'ing.
Posted on: 7/22/2012 6:21 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11165057

RE: CDI Summary (The New, New CDI Thread)
Yes, well, the system with the 12F683 works just fine now. It doesn't really need any refinement. It could be a different story though to try to change the existing program and this was my point. It would be quite easy to just add another micro to do the Tx of any peripherals without trying to add on to an existing program that is not fully understood except by the original programmer. As you say, micros are cheap.
Posted on: 7/22/2012 4:28 AM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11164248

RE: CDI Summary (The New, New CDI Thread)
Things are not always as simple as they may first appear. Not having seen the asm yet i think it's a bit presumptuous to assume you can make sparkling changes to a program that has been worked on and refined over a long period. Having said that, you can find the start of the 12F683 discussions here. It's all open to changes for the better so good luck. http://www.rcuniverse.com/forum/m_10662258/tm.htm
Posted on: 7/21/2012 6:58 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11163968

RE: CDI Summary (The New, New CDI Thread)
John's system along with Nyemi's code seems to be working quite well with a 12F683 Pic micro. It's a simple system without any bells and whistles but ok just the same. There were some settings within the program that may want to be altered to suit the individual, and since the program is written in assembly, changes are made, then recompiled and shoved into the chip. Nyemi has shown where and how to make the changes for those of us in the know about program changes, other than that, he was offering to make the changes and then send back the new asm code by email to the individual. I can't see where adding other sensors and programming to this chip would be a good idea. Probably better to let it do it's job and set up another micro with whatever. John will no doubt read this and reply as to just where all the up-to-date latest details are. I am presently away from home and not able to access the info for you. Last time I spoke with John, he was trying a new "output section" to see if he could get the spark a bit hotter. Previous one worked ok for me, perhaps he had a special application in mind. Gompy's system using a 16F628A was very good as far as ideas went, but unfortunately it suffered in many instances, from run-away sparking at a moments notice and so severe at times that the program would be lost from the micro. I had one that became unusable after one of these sessions. With the others, I was able to re-program. Never did sort out the reason why it was defective, the code was never released (just the hex)so no one was able to examine the former either. Many built the system as described so no fault there as far as we could see. Gompy's system had a monitoring program, in which curves could be changed via a graph and then the new curve downloaded via in circuit programming. A lot of time and effort on his part and many appreciate his input.
Posted on: 7/21/2012 6:40 AM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11163384

RE: Interference problem HELP please
Never found it necessary to use shielded cable if the noise suppressor plug was used and eliminate the steel throttle link. You've kept radio gear isolated best you can so I would try that first. Shielding would be a final application if all else failed. TV Co-ax will not be suitable as it is designed for TV signals at very small voltages, maybe just a few millivolts. Ignition systems operate at thousands of volts and the co-ax does not have a high dielectric strength. i.e. the spark will jump across the insulation to the outer shield under load. In days gone by, the co-ax cable had a fairly loose shield that could be removed quite easily and re-applied to another cable but these days, co-ax is quad shield and the shield is moulded in the cable and would be impossible to remove as once-upon-a-time.
Posted on: 7/19/2012 5:56 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11161792

RE: Off Topic but maybe you guys can help...
250mA a bit light I think. I'd be sticking to the 500mA or 1000mA. Why constant current..? If it is just a load test, a straight resistor will be fine. Constant current if you want to discharge until you get a predetermined voltage and then calculate capacity from the time constant. As most nicads are C5 rated (capacity calculated when cells are discharged over a 5 hour period) then each size pack would require different discharge rate. E.G. 600mAh divide by 5 = 120mA , 1000mAh divide by 5 = 200mA
Posted on: 7/16/2012 5:48 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11157916

RE: Interference problem HELP please
Steel throttle rod would be the first thing I would replace with plastic as mentioned. Also look for and replace any metal to metal clevices/horns. Also use a radio noise suppressor spark plug. Standard plug say for instance ,CM6 , I think the suppressor type is CM6R or CM6RC .
Posted on: 7/16/2012 5:37 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11157901

RE: Off Topic but maybe you guys can help...
You will find that a 10 ohm 5 watt resistor will work just fine on a normal flight pack for maybe 30 seconds or so. Puts about 0.5amp load, similtaneously measure the voltage and see it does not drop off by more than about 0.1 to 0.2 volts. If it's a nicad pack and it drops down to say 3.9V then seriously needs recharge (or replacement if just freshly charged) Be aware also that this is a good test to show up signs of "black wire". Cable will actually rot in the negative line. Starts at the battery and slowly works it's way through all the wiring and connectors and finally gets into the receiver. Then it's all junk. Black wire is visible in the gold connectors quite readily and if you give the wiring a pull it will snap in half.
Posted on: 7/8/2012 6:42 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11148056

RE: Prop Position
Any external balancing of an imbalanced crankshaft will introduce lateral imbalance and should be avoided. i.e it only adds to the problem.
Posted on: 6/17/2012 4:12 AM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11120925

RE: Balance/harmonic issue
Harmonic imbalance is a combination of tortional reaction and engine imbalance but I doubt is is your problem here. You say you are a thou here and a thou there and although it may not seem much, it will have the effect you describe. Tkg was right in his quote about vibration and how it tends to smoooth out at a particular rpm which is why they re-balance stock engines when they are to be used at higher rpm. All engines vibrate at particular rev ranges and oddly enough, odd number cylinder engines are smoother than even numbered cylinder.Normally external balance of a crankshaft is avoided in favour of internal balancing as the former tends to add another dimension of imbalance. In short, your hubs need to be true turned. I have heard of a Gnats whisker having been used many times before as a measurement , even used it myself to describe a small amount, but so far cannot track down any reference anywhere as to the actual size. Maybe it is rellavent to the job at hand and therefore varies.[;)]
Posted on: 5/27/2012 5:31 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11096659

RE: Complete new CDI - website open
[quote]ORIGINAL: captinjohn Anything new in this forum???  You know something earth shaking !! [/quote] I think mostly moved over to John's system with the 12F683 as this one still has the misfiring problem. As the source code has been withheld, it is difficult to say where the problem lies. It would have been nice to see it completed as there are many great features and a LOT of work from Gompy and other people also. For the time being however, it is a system you sit on the bench and watch all the pretty pictures but connect the ignition board and things go crazy. Spark is irratic and self-triggering, even to the point where it will wipe part of the program. I know John tried many things and I also made a test board where certain parts could be isolated to try to narrow down the fault, but just when it looked promising, things would go belly-up again. Might be usable in the future as an electronic injector for a diesel engine.
Posted on: 4/20/2012 5:55 PM by Author "bluejets" in the forum "Engine Conversions"
http://www.rcuniverse.com/forum/fb.asp?m=11050412