| T O P I C R E V I E W |
| wasssup1990 |
Posted - Aug 09 2004 : 02:47:48 AM
I'm going to build a Generator to supplly power to my inverter you may have noticed on the "Power Supply" forums of this website; titled "My inverter design".
The URL is. -- http://johnnyssite.topcities.com/Storage/Generator.htm
This is just a schematic of the Ignition system, if you can suggest something reasonable or notice a problem with it please tell me. Like a current limiting resistor I can put between the coil and the battery.
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| 8 L A T E S T R E P L I E S (Newest First) |
| wasssup1990 |
Posted - Aug 13 2004 : 07:45:46 AM
Interesting, thanks for the help.
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| Aaron Cake |
Posted - Aug 12 2004 : 1:09:38 PM
The modern magnetos are very good at cold starts. In fact, they are one of the reasons I got out of the lawnmower repair business. Points/ignition was 90% of my business, and when the all electronic magnetos became common, there was nothing for me to do.
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| wasssup1990 |
Posted - Aug 11 2004 : 5:33:11 PM
Hey, this is all one big experiment, I like doing these things. The reson i'm replacing the magneto is because I want to try something different, hopefully the engine will start much easier then having to pull the cord really hard to get the magneto up and running itself.
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| Aaron Cake |
Posted - Aug 11 2004 : 10:46:40 AM
I just don't see why you need to replace a system that is already on the engine, and has been proven reliable for the past 100+ years. You'll have a hard time improving on it. You gain nothing by doing so. If you want to go all electronic, just use a modern magneto.
I'm also not so sure why a microcontroller is required...It seems like an unnecessary complication, and adds many more failure points. Especially if you still rely on a person to start the engine...
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| wasssup1990 |
Posted - Aug 11 2004 : 01:55:28 AM
In what way do you mean "beating the magneto that comes with the engine"? Do you mean time; or performance? If its time all I need to do is put the reed switch before the orginal magneto's position. But I also like your idea, I preffer your's; i'll to research on these Hall effect transistors you mentioned.
This IC controlled generator is gonna be cool, i've done the whole design. The IC which is a Basic Stamp 2, will have control over:
Throttle open
Throttle closed
Fuel valve (Enable/Disable)
Ignition coil (Enable/Disable)
And other things.
I've written the program and I thought why not put it on the forum.
' {$STAMP BS2}
btnWrk VAR Byte
oncheck VAR Byte
throttleoff VAR Byte
stop1 VAR Byte
Standby:
LOW 8 'check that ON LED is off
LOW 3 'check that ready LED is off
BUTTON 5, 1, 200, 20, throttleoff, 0, off 'Throttle open check
BUTTON 0, 1, 200, 20, btnWrk, 0, Standby 'Prepare
GOTO Prepare
Prepare:
HIGH 1 'Open fuel valve
HIGH 2 'Opening Throttle. Should have opened so no need to check pin 5.
PAUSE 5000
LOW 2 'Stop throttle motor
GOTO Ready
Ready: 'NOTE: Must pull cord and wait 2 seconds after momentum has stopped if not started.
HIGH 3 'Ready LED on
BUTTON 4, 1, 200, 20, stop1, 1, Standby 'stop
BUTTON 4, 1, 200, 20, oncheck, 0, Ready 'Engine on sence
HIGH 7 'Ignition coil enabled
PAUSE 2000
BUTTON 4, 1, 200, 20, oncheck, 0, Engine_check 'Engine on sence to check that Engine is on.
GOTO ON 'Engine is on
Engine_check:
LOW 7
GOTO Ready
ON:
HIGH 8 'ON LED on.
LOW 3 'Ready LED off
GOTO ON2 'monitoring
ON2: 'running succesfully
BUTTON 4, 1, 200, 20, oncheck, 0, error 'Repetative engine ON check.
BUTTON 4, 1, 200, 20, stop1, 1, off 'stop
GOTO ON2
error:
LOW 8 ' ON LED off
LOW 7 'Ignition coil disabled
GOTO ready
off:
LOW 1 'Close fuel valve
HIGH 6 'Close Throttle
PAUSE 5000
LOW 6 'Stop throttle motor
LOW 7 'Disable ignition coil
BUTTON 5, 1, 200, 20, throttleoff, 0, off 'Throttle off check
GOTO standby
Looks good eh?
Edited by - wasssup1990 on Aug 11 2004 01:57:52 AM |
| Aaron Cake |
Posted - Aug 10 2004 : 3:18:31 PM
You can use a hall switch instead of your reed switch, and a transistor to trigger the coil. However, you'll have a hard time beating the magneto that comes with the engine. If you really want to go all electronic, you can use a magneto from a newer engine. Almost all new engines use a SCR and trigger coil (built into the magneto itself) instead of points.
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| wasssup1990 |
Posted - Aug 10 2004 : 02:23:48 AM
Theres nothing wrong with the original Magneto, all i want is a electronicaly controled ignition. Anyway i've created a better design, with the entire electronics schematic; on second thoughts I think i've gotta enough confidence to build this generator myself without help. Thanks for your intrest in responding to this post anyway. If you say that the reed switch will burn up even when its connected to the relay, then what do ya suggest? This is what I mean, try and suggest things Aaron, and anyone ells of course. All the things i've ever built are for hobby perposes, not selling the things I make. What i'm trying to accomplish is the confidence that a person my age can do these things again and again, just like yourself.
Thanks dude!
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| Aaron Cake |
Posted - Aug 09 2004 : 10:29:23 AM
I'm really not sure what you're trying to accomplish. What's wrong with the original magneto ignition?
But that diagram won't work for multiple reasons. The reed switch is too small (it will burn instantly), it doesn't switch fast enough, the relay is too slow (especially with the delay from the reed switch) and there isn't any way to charge the battery (unless you're going to do it with your alternator).
Edit...Also, that image is over 800K in size is is about 3 screens in size. You should probably reduce it significantly.
Edited by - Aaron Cake on Aug 09 2004 10:30:05 AM |
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