FreeEMS 1.0 Hardware:

Not complete, has not been prototyped yet so it's alpha or perhaps pre-alpha. However, read the below for more details and get involved. Right now we are waiting for software to develop to the point where we can make the final attachments of the circuits to the CPU pins. Easy work compared to what has been designed so far.

• This version of FreeEMS is intended to be the master copy. This version is what the primary software is designed against, and is also very flexible so it should work with most motors. Whether it's a 1 cyl 1 injector small engine, or a 6 cylinder 6 ignition coil turbo charge water injector monster, you have support with this project.

This version includes the general features below.

• Sequential fuel and spark (8 and 12 cyl w/ 2 units)
  • 6 Low side injector drivers support with superior auto-protected FET or snubber Cap or snubber diode.
  • 6 Low side ignition low power drivers, power driver FET's are external. Increasing isolation voltage.
• 2 MAP sensors 1st barometric, 2nd intake
• 3 general purpose low side driven outputs for fuel pump, ect.
• 2 RPM inputs for both VR and hall sensors
• Expandable via add-on cards
• Various connections via connection card
• Schematic and Layout under GPL and TAPR OHL with KICAD for 2 layer, 2 oz copper PCB, 1 Euro-card (6.99in/177.546mm By 3.93in/99.822mm)
• All digital and analog IO are protect against many abnormal conditions, making this system very rugged.

• A 3D rendering of it from KICAD found here
• A pictorial snap shot of the PCB layout found here
• A pen sketch showing the envisioned stack found here
• A general overview, shows injectors, battery, ignition coils, ect can be found here
• Note to self or who ever wants to do it up, remember to create better picture showing the stack with TA on top, add-on's below, ect

• CPU Prototype board : Tech arts Adapt9S12XDP512
• JimStim : Found here DIYAutoTune
• Schematics w/ reference layout: Found here SF download page
• Add-on1 : not designed yet, includes knock sensing, IAC, and various other features
• Add-on2 : not designed yet, includes ion sensing, and various other advanced features
• Connector Card : not designed yet, includes connection to a standard interface for testing on Jim Stim, and another connection for the vehicle hookup.

• FreeEMS firmware found at Source Forge Firmware doxygen docs foun here Source Forge
• FreeEMS tuner found at diyefi.org