Search found 249 matches
- Sun May 29, 2011 6:11 am
- Forum: Puma
- Topic: Use an LM1949 to Drive a FET?
- Replies: 13
- Views: 28782
Re: Use an LM1949 to Drive a FET?
You're right, they're obvious. No such code will be included in my, root-source, upstream, master source for FreeEMS. This decision, like all others, was made by community consultation, and the result was that the vast majority of users, at the time, agreed that it was a poor choice to implement th...
- Sat May 28, 2011 1:14 am
- Forum: Puma
- Topic: Use an LM1949 to Drive a FET?
- Replies: 13
- Views: 28782
Re: Use an LM1949 to Drive a FET?
Another way to do it, is to DMA rake a piece of memory across a GPIO pin. Such that you draw any series of pulses you want, across that pin, and you do it when you trigger the DMA to start raking. This allows you to draw any wave form you want. I don't understand the term 'rake' either. Do you mean...
- Sat May 28, 2011 1:04 am
- Forum: Puma
- Topic: Use an LM1949 to Drive a FET?
- Replies: 13
- Views: 28782
Re: Use an LM1949 to Drive a FET?
No, it is absolutely not up to Marcos, at all. It's solely up to me, and I can tell you, that this will not ever be included in FreeEMS sources. This is a software decision, not a hardware one. It has been made for all the right reasons, a long time ago. A hardware solution is required to support t...
- Fri May 27, 2011 2:47 am
- Forum: Puma
- Topic: Use an LM1949 to Drive a FET?
- Replies: 13
- Views: 28782
Use an LM1949 to Drive a FET?
Yes, use it to drive a FET instead of a bipolar. Have you guys tried it?
If so, what happened? I think it can be made to work.
If so, what happened? I think it can be made to work.
Re: Daily WTF
What's the matter here? Is all not well in Fredland?
:wink
Edit: Btw, I think I noticed a spelling error in one of the Russian-language threads. And one post had too many carriage returns.
+1 :wink
:wink
Edit: Btw, I think I noticed a spelling error in one of the Russian-language threads. And one post had too many carriage returns.
+1 :wink
- Sat Apr 30, 2011 11:06 am
- Forum: FreeEMS Firmware Dev
- Topic: Reasons To Cut Injection/Ignition With Hysteresis
- Replies: 30
- Views: 56053
Re: Reasons To Cut Injection/Ignition With Hysteresis
Good idea, assuming you know which it is. What if you are wasted spark with half sync, should you then be allowing fuel/air into the exhaust unburned for a cycle always before reallowing ignition? I'm unsure how to make it work, but it's definitely worth trying to! Thanks! Yes, that unsparked fuel ...
- Sat Apr 30, 2011 10:51 am
- Forum: FOSS EMS Firmware
- Topic: fly by wire throttle
- Replies: 81
- Views: 190862
Re: fly by wire throttle
You get back the energy from drawing the vacuum against the throttle plate, because that vacuum helps lift the piston on the compression stroke. Pumping losses are from pumping. With a blocked intake there is very little air being pumped. If you consider a completely closed intake and exhaust, there...
- Fri Apr 29, 2011 10:53 pm
- Forum: FreeEMS Firmware Dev
- Topic: Reasons To Cut Injection/Ignition With Hysteresis
- Replies: 30
- Views: 56053
Re: Reasons To Cut Injection/Ignition With Hysteresis
...if you're delivering two injections per cycle, the implication is that you're delivering that to two oppositely timed cylinders. Thus if you start firing on one, then one cylinder gets a full breath of fuel, and the other gets half, and if you fire on the other it's reversed. Which raises the qu...
- Thu Apr 28, 2011 9:53 pm
- Forum: FOSS EMS Firmware
- Topic: fly by wire throttle
- Replies: 81
- Views: 190862
Re: fly by wire throttle
Either your Jetta is diesel, has two throttles, or you're wrong. Are there any other options? Diesel regulates torque via fuel supply with full air supply always. Two throttles can be used, one electronic one mech for traction and/or safety control of other kinds. A gasoline/petrol engine with a wi...
- Sun Apr 10, 2011 12:52 am
- Forum: FreeEMS Hardware Dev
- Topic: PCB layout for Cinch ModICE enclosure
- Replies: 46
- Views: 76514
Re: PCB layout for Cinch ModICE enclosure
Great work fellas!