MegaSquirt Group Purchase

[Bruce Bowling]

[I posted the following message last Saturday to the list, but I am not 
sure if it went out, so here it is again]

Just an update on the MegaSquirt group purchase: we are doing a minor PCB 
board re-spin to fix a few component hole sizes and replacing the 
totem-pole FET drive circuit with a drive circuit from On-semi - this will 
make the board easier to assemble and guarantee operation down to very low 
temperatures.  I will be posting the new schematics on the www site within 
a few days:

               http://www.bgsoflex.com/megasquirt.html

It will take approximately two to three weeks to have the prototype PCB 
boards made up, populated, and tested. Once this is complete, we will start 
up the one-time group buy. The original goal of U.S.$100.00 per kit plus 
shipping (professionally etched PCB with silkscreen and soldermask, all 
board components including pre-programmed micro-processor and MAP sensor, 
connectors, and case) is still on track. It looks like the lead times for 
the components and the PCB fabrication will be around 4 - 5 weeks. So, with 
no hiccups with component leadtimes, ship time for the kits should be right 
around the end of December/first to middle of January. We need at least 100 
units ordered in the group to get the price down to the $100.00 target.

Please hold off on requests for kits until we are ready - we will post the 
details of the group purchase here when it starts up.

Also, we have posted the PC Configurator program on the WWW site, and all 
of the required embedded files, along with the P&E assembler.  Note that 
there will be some changes to the PC Configurator and the embedded source 
occuring within the next few weeks:

1) A better tuning page for the PC Configurator, to include all runtime 
parameters and allow for one-handed tuning, while keeping the other hand on 
the steering wheel.

2) With the change of the FET driver to the On- Semi MC33151 device, the 
output drive form the processor will need to be inverted in software. I 
will make this as a #define in the beginning of the code to allow inverted 
(for the On-semi driver) or non-inverted (for the totem-pole circuit).

3) The addition of a "Bootloader" code which will allow one to re-load the 
EFI embedded controller program via. the serial port and PC Configurator. 
Right now, one has to program the GP32 device using a dedicator programmer 
or programmer circuit. With the bootloader program burned in (using a 
regular programmer the first time) one can re-load the entire program with 
the current MegaSquirt hardware, i.e true in-circuit re-programmability. 
Any new algorithm changes, bug fixes, etc, can be easily downloaded right 
in the car via. the serial port. I should have this code finished and 
tested before the group purchase shipment, and included in the 
pre-programmed GP32 parts.

Bruce Bowling
Al Grippo




>------------------------------
>
>Date: Wed, 10 Oct 2001 12:34:37 +0300
>From: bill.shurvinton at nokia.com
>Subject: Megasquirt group buy
>
>Hi,
>
>Can anyone tell me if there is a megasquirt group buy ongoing. I have
>downloaded the stuff about it off the web, and after reading the source
>code have discovered that it is nigh on perfect for the EFI conversion I
>am planning on my 13B rotary. It is a testament to Al and Bruce how easy
>the source code is to read that I could get to the bottom of it so
>quickly.
>
>Anyway, there were one or 2 mails about a group buy a few weeks ago, but
>then no mention of it anywhere else. I have scoured the relevant web
>sites, but can't find anything. Can anyone shed light on this?
>
>Rgds
>
>Bill Shurvinton
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- Bruce

---------------------------------------------
              Bruce A. Bowling
          bbowling at earthlink.net
    http://home.earthlink.net/~bbowling
---------------------------------------------

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