The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
This forum is for discussion of MicroSquirt (TM) from Bowling and Grippo. The MicroSquirt information site is at www.usEasyDocs.com
Forum rules
Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
I'm new to MS. I've just finished MS 2 kit with V3.0 PCB. Im gonna use it with EDIS ignition but I'm a little afraid of SAW signal output from MS II. As I've noticed that this signal outputs directly from processor port (procesor pin to EDIS module passing ONLY through 1Kohm resistor. Isn't it too dangerous for processor to operate directly EDIS module without buffering the signal from pin 8? If something's go wrong with EDIS what will protect the processor pin? So the question is: As there are two free NAND elements of U2 (74HC00) on MS II daughter card can I use them to buffer the signal from pin8 before it goes to R9 resistor? The delay in the signal from passing through this two NANDs will be no more than 60nS and I don't think this will make a significant influence in output signal. Thanks in advance
Wiring to the NAND gates may be a bit tricky and that is still an SMD should anything go wong. Instead maybe use a discrete transistor in the proto area with a pullup to +5v. Invert the output in Megatune or use two transistors.
to EDIS module passing ONLY through 1Kohm resistor. Isn't it too dangerous for processor to operate directly EDIS module without buffering the signal from pin 8? If something's go wrong with EDIS what will protect the processor pin? So the question is: As there are two free NAND elements of U2 (74HC00) on MS II daughter card can I use them to buffer the signal from pin8 before it goes to R9 resistor? The delay in the signal from passing through this two NANDs will be no more than 60nS and I don't think this will make a significant influence in output signal. Thanks in advance