NO2C for Speeduino

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The No Overhang Two Channel boards made for Speeduino share the features below

  • Arduino MEGA 2560 shield board
  • Same size as the Arduino
  • 2 injector output channels
  • 2 coil output channels
  • Dedicated tachometer output
  • 4 medium/high current outputs (idle, boost, VVT, fuel pump, fan, etc)
  • IAT, CLT, TPS, and O2 inputs (protected)
  • On-board MAP sensor
  • Stepper idle control through board mounted DRV8825 accessory PCB
  • VR conditioning through board mounted VR conditioner accessory PCB

Like the official Speeduino boards, the NO2C requires igniter driven coils and a conditioner for crank/cam signals that aren't 5v square-wave. The board is designed to accept the official Speeduino conditioner board for signals that do not meet the requirements.

NO2C v0.1.x

Uses the AMP MTA-100 or Molex KK100/KK254 connector system and through hole components

v0.1.0

  • Had flaws which caused the Arduino USB connector to interfere with the boards solder pads
  • lacked tachometer output
  • was never released

v0.1.1

  • corrected the issue mentioned above
  • added tachometer output

NO2C v0.2.x

Uses the Molex Micro-Fit 3.0 connector system and through hole components. The Micro-Fit connector is used as a computer power connector and there are several manufacturers, it's known generically as 3mm connector.

For some tips that will help make the assembly of your board a success: v0.2.x Assembly Tips

v0.2.0

  • Added pass through pinholes around the edge for daughter board expansion
  • Increased size of resistor footprints making it easier to find usable resistors and/or use precision resistors for all voltage dividers
  • Increased pitch of 1uf caps (see above)
  • Added launch control input

v0.2.1

  • Improved silk screen
  • All MOSFET outputs (injector and auxiliary) have the same gate connection to the Arduino MEGA
  • VR signals are routed straight into the conditioner
  • MAP sensor location accepts either though-hole or SMD part
  • Other routing and placement adjustments (R10 and R11 are flipped)

v0.2.2

  • Moved C20 from the edge of the board, it has always bothered me there
  • Added Serial0/Bluetooth header
  • Other routing and placement adjustments

vC1

  • Traditional reset protection removed in favor of a jumper and resistor to hold the reset pin high
  • Routing and placement adjustments
  • Version style changed to bring inline with other projects and due to required BOM change compared to v0.2.x

NO2C DB (not yet released)

A daughter board that stacks on top of the NO2C v0.2.x boards to add the features below. The daughter boards are hybrid surface mount/through hole, see features below for which parts are through hole.

DB1

Makes it easy to add additional general outputs, and can be populated to add all the features below.

  • 4 low current outputs (through hole)
  • 2 general digital inputs (protected)
  • 1 analog input (protected)
  • Flex-fuel input (protected)
  • Barometric pressure sensor (provides constant correction vs power on base)

DB2

Makes it easy to add additional coil outputs, and can be populated to add all the features below.

  • 2 additional coil output channels (through hole)
  • 4 low current outputs
  • 2 general digital inputs (protected)
  • 1 analog input (protected)
  • Flex-fuel input (protected)
  • Barometric pressure sensor (provides constant correction vs power on base)

It is conceivable that with the low current outputs you could reconfigure two of the medium/high current outputs on the NO2C to act as injector drivers. More information will be provided when available.