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FreeEMS revision A version 1 first edition PCB feeler
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Fred
Moderator
Joined: Tue Jan 15, 2008 2:31 pm Posts: 15376 Location: Home sweet home!
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This thread is to gauge interest in getting a FreeEMS PCB through a future bulk buy. Please post in this thread if you are in principle interested in going in on a bulk buy of 10 or 20 of the initial FreeEMS PCB. Discussion here : viewtopic.php?f=9&t=407One post per person in this thread please. If your interest is conditional upon various features please state that. Some things you may or may not care about : - On board IGBT ignition drivers
- On board low Z injector drivers
- Thermistor self heating prevention :-p
- NO thermistor self heating prevention
- Current feedback circuitry on injectors
- NO current feedback circuitry on injectors
- ONLY SMD components
- ONLY TH components
- SMD components supported
- TH components supported
- X primary fuel channels required/preferred
- X ignition channels required/preferred
- X auxiliary low current low side drives preferred and required OnOff / PWM
- X auxiliary high current low side drives preferred and required OnOff / PWM
- How many boards?
Also state how many you would be willing to purchase to make up numbers if required. My requirements are : - Don't need - either
- Don't need - either
- Don't want - prefer not, but either
- Don't care - prefer not, but either
- Don't want - prefer not, layout dependent
- Undecided, layout dependent
- Won't buy
- Will buy
- Don't care - either
- Required
- 4 primary fuel channels prefer 6
- 4 LOW LEVEL ignition channels prefer 6
- prefer : 2 on/off for relays for fans no low current pwm
- prefer : 2 high current PWM for boost/idle, no high current on/off
- 1 or 2 depending on how much I like the design
Unused injector channels can drive high current on/off stuff and unused ignition channels can drive low current and/or high current on/off stuff. PWM outputs would need to be just for that only. Quote this message and edit away all the stuff except the main list and then run through it changing the words to your thoughts on the item. To summarise for me : 1 or 2 boards Must have 4 high Z fuel channels Must have 4 low level ignition drivers Must have through hole component layout If the current feedback isn't dropped and it makes a mess of the layout I may be not be interested. Would prefer it wasn't there. It is assumed that basic stuff like good power supplies and sensor inputs including at least 2 VR inputs, analog wbo2, air, water, tps, map, atmo, etc will be included by default. You don't need to worry about that sort of thing. If there is something you really care about that isn't on the list, please mention it clearly. State your interest here!! :-) It will be a little while before it goes to be printed, and a little while before we have usable code for it too this just a feeler to see what people are and aren't interested in buying and testing/using. Fred.
_________________DIYEFI.org - where Open Source means Open Source, and Free means Freedom FreeEMS.org - the open source engine management system FreeEMS dev diary and its comments thread and my turbo truck!n00bs, do NOT PM or email tech questions! Use the forum! The ever growing list of FreeEMS success stories!
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Fri Aug 22, 2008 10:28 pm |
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AbeFM
Post Whore!
Joined: Sat Feb 16, 2008 12:11 am Posts: 629 Location: Sunny San Diego
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- On board IGBT ignition drivers
- On board low Z injector drivers YES
- Thermistor self heating prevention :-p
- NO thermistor self heating prevention
- Current feedback circuitry on injectors
- NO current feedback circuitry on injectors
- ONLY SMD components
- ONLY TH components
- SMD components supportedYES
- TH components supported
- X primary fuel channels required/preferredYES,2/4
- X ignition channels required/preferredYES,2/4
- [fred was here]
- [fred was here]
- How many boards?
I'd also: NEED: 1-WBO2, drive for 1 relay (fans) Want STRONGLY: Knock Sensor In, Drive for 2 relays (total), 2 PWM soleniods Want: EGT in, Drive for 3 relays (total), RPM based Knock Sensor decoding (I have a lead on some circuits for this) Wish - ooodles more, 4 secondary injectors, etc etc.
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Fri Aug 22, 2008 11:27 pm |
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davebmw
LQFP144 - On Top Of The Game
Joined: Sun Jul 13, 2008 2:58 pm Posts: 331 Location: South Wales, UK
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- On board IGBT ignition drivers x 6
- On board low Z injector drivers x 6
- Thermistor self heating prevention No Way!
- NO thermistor self heating prevention Correct
- Current feedback circuitry on injectors No Thanks
- NO current feedback circuitry on injectors Correct, waste of PCB real estate sorry
- ONLY SMD components Inflexible
- ONLY TH components Bulky
- SMD components supported Yes
- TH components supported Yes
- primary fuel channels required/preferred 6
- ignition channels required/preferred 6
- auxiliary low current low side drives preferred and required OnOff / PWM 3xPWM, 4xon/off
- auxiliary high current low side drives preferred and required OnOff / PWM 2
- How many boards?
1 main PCB preferably with 88 way motronic connector footprint and Qty of 2-4.
Also: WBO2 input is a must Cam hall sensor x 1 CAN comms would be nice Preferably all High current drivers to be TO220 or TO3P SMT begrudgingly.
_________________ 93'BMW 325is M50B25TU, Rebuilt 06/06, JE10.5:1, polish&port. Scorpion BB, K&N CAI, TEJ21 WBO2, '07 M3 Evo 18" 225F, 255R, EBC Kevlar, Bilstien Sprint, Polyflex. Head rebuild Oct'08, OEM+FSE FPR, MS2v3.0_DJB Custom, Extra 2.0.1
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Sat Aug 23, 2008 12:40 am |
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jharvey
1N4001 - Signed up
Joined: Tue Jun 10, 2008 5:17 pm Posts: 1607
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- On board IGBT ignition drivers at least 1
- On board low Z injector drivers no preference
- Thermistor self heating prevention required
- NO thermistor self heating prevention Isn't this the same question twice?
- Current feedback circuitry on injectors yes please, but not a deal breaker
- NO current feedback circuitry on injectors again same question right?
- ONLY SMD components no preference
- ONLY TH components no preference
- SMD components supported no preference
- TH components supported no preference
- primary fuel channels required/preferred at least 1, no preference about more
- ignition channels required/preferred 1
- auxiliary low current low side drives preferred and required OnOff / PWM no preference
- auxiliary high current low side drives preferred and required OnOff / PWM no preference
- How many boards?1-2 main PCB's
My interest is around small engines, as they are good platforms for experimental purposes.
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Sat Aug 23, 2008 1:19 am |
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gearhead
LQFP112 - Up with the play
Joined: Sun Feb 03, 2008 9:30 pm Posts: 120 Location: Chicago, USA
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I have posted in some of the discussions.
Preferences: 1. On board IGBT ignition drivers No. Not desired for this install, but please keep them in the design. 2. On board low Z injector drivers No. Not desired for this install. Not wanted in general as it complicates things in a revision A 'base system'. 3. Thermistor self heating prevention :-p No. Not desired or necessary in general for EFI, IMO. 4. NO thermistor self heating prevention Yes. Preferred embodiment for 'base system'. 5. Current feedback circuitry on injectors No, please. Not desired as for 'base system' not necessary to consume board and complicate drive circuitry to get this info. Easy enough to do as daughter if necessary. Please, walk comes before run. 6. NO current feedback circuitry on injectors Yes. Preferred embodiment. 7. ONLY SMD components No. Old eyes and too many possible problems to debug over internet. 8. ONLY TH components Yes. For all passive devices, the 'TH plus SMD' trace layout looked good to me. 9. SMD components supported Yes, Many nice FETs and IGBTs are avail in larger, easy to solder packages (dpak). That said, I am also in favor of the vertical to220 install geometry if devices are avail. 10. TH components supported Yes, must. 11. X primary fuel channels required/preferred 4 fuel channels 12. X ignition channels required/preferred 4 ignition channels (plus cam and crank inputs both hall) 13. X auxiliary low current low side drives preferred and required OnOff / PWM 1 tachometer output 14. X auxiliary high current low side drives preferred and required OnOff / PWM 3 high current drives in addition to Fuel pump (PWM idle, PWM Boost, PWM ELCD) 15. How many boards? 1
Additionally I wish for 2 inputs (on/off) A/C on, clutch engaged/disengaged
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Sat Aug 23, 2008 6:52 pm |
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Delta
LQFP112 - Up with the play
Joined: Fri Jul 25, 2008 8:04 pm Posts: 111 Location: Perth, WA, Australia
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- On board IGBT ignition drivers
- On board low Z injector drivers
- Thermistor self heating prevention :-p
- NO thermistor self heating prevention
- Current feedback circuitry on injectors
- NO current feedback circuitry on injectors
- ONLY SMD components
- ONLY TH components
- SMD components supported
- TH components supported
- X primary fuel channels required/preferred
- X ignition channels required/preferred
- X auxiliary low current low side drives preferred and required OnOff / PWM
- X auxiliary high current low side drives preferred and required OnOff / PWM
- How many boards?
My requirements are : - Prefer at least 1.
- Prefered
- No
- Yes
- If space is available
- Doesn't matter
- Won't buy
- Will buy
- Don't care
- Required
- 4 primary fuel channels prefer 8
- 4 ignition channels prefer 8 either low or direct drive
- 1x as many types of outputs we will have
- 1x as many types of outputs we will have
- 1 for testing
Aditionally, 2x analog inputs 2x digital inputs
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Sun Aug 24, 2008 5:11 am |
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KW1252
LQFP112 - Up with the play
Joined: Tue Jan 15, 2008 5:31 pm Posts: 166
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- On board IGBT ignition drivers Prefer not
- On board low Z injector drivers No preference
- Thermistor self heating prevention :-p Prefer not
- NO thermistor self heating prevention
- Current feedback circuitry on injectors Not necessary
- NO current feedback circuitry on injectors
- ONLY SMD components Not on the initial release!
- ONLY TH components Prefer not
- SMD components supported Would be nice
- TH components supported OBviously
- X primary fuel channels required/preferred 4 required, 6 preferred
- X ignition channels required/preferred I can do with any number over one
- X auxiliary low current low side drives preferred and required OnOff / PWM 4 required 6 preferred on/off, no PWM
- X auxiliary high current low side drives preferred and required OnOff / PWM 4 required, 6 preferred PWM, no on/off
- How many boards?2
Plus 4-6 additional analog inputs and 4 digital.
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Sun Aug 24, 2008 4:35 pm |
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SleepyKeys
LQFP144 - On Top Of The Game
Joined: Mon Feb 11, 2008 10:52 pm Posts: 549 Location: Arizona
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FreeEMS revision A version 1 first edition PCB feeler
1. On board IGBT ignition drivers OPTIONAL 2. On board low Z injector drivers OPTIONAL 3. Thermistor self heating prevention NOT NOW 4. NO thermistor self heating prevention NOT NOW 5. Current feedback circuitry on injectors NOT NOW 6. NO current feedback circuitry on injectors NOT NOW 7. ONLY SMD components :no preference 8. ONLY TH components :no preference 9. SMD components supported :no preference 10. TH components supported :no preference 11. X primary fuel channels required/preferred 8 required 12. X ignition channels required/preferred 8 required 13. X auxiliary low current low side drives preferred and required OnOff / PWM 4 required 6 preferred on/off, no PWM 14. X auxiliary high current low side drives preferred and required OnOff / PWM 4 required, 6 preferred PWM, no on/off 15. How many boards?1
Plus 4-6 additional analog inputs and 4 digital.
_________________ You snooze, you lose!
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Sun Aug 24, 2008 7:26 pm |
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compnut21
DIP8 - Involved
Joined: Thu May 01, 2008 1:20 pm Posts: 22 Location: Redmond, WA
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- On board IGBT ignition drivers not needed
- On board low Z injector drivers not needed
- Thermistor self heating prevention bare hands
- NO thermistor self heating prevention yup
- Current feedback circuitry on injectors sure, why not
- NO current feedback circuitry on injectors meh
- ONLY SMD components not on the first board
- ONLY TH components bleh, but yes.
- SMD components supported dont care
- TH components supported dont care
- primary fuel channels required/preferred 4
- ignition channels required/preferred 4
- auxiliary low current low side drives preferred and required OnOff / PWM 2-4ish?
- auxiliary high current low side drives preferred and required OnOff / PWM unknown
- How many boards? 2 maybe
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Mon Aug 25, 2008 12:35 am |
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Fred
Moderator
Joined: Tue Jan 15, 2008 2:31 pm Posts: 15376 Location: Home sweet home!
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Just a reminder that the discussion for this is here : viewtopic.php?f=9&t=407Please place your comments etc there to keep this clean and pure :-) Fred.
_________________DIYEFI.org - where Open Source means Open Source, and Free means Freedom FreeEMS.org - the open source engine management system FreeEMS dev diary and its comments thread and my turbo truck!n00bs, do NOT PM or email tech questions! Use the forum! The ever growing list of FreeEMS success stories!
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Tue Aug 26, 2008 7:47 am |
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