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Smart-Round-Dual was the http://www.vems.hu/files/sensors/WBO2/Round_kit_0019_m.jpg The manufactured version: Features: * 3 digit 7 segment LED (with dots) * 4 digit 7 segment LED (with dots) * Voltage output. High resolution (up to 5V, 12bit, programmable output curve) * RS232 level ** directly plugs into PC ** or USB-RS232 adapter ** or small dongle for CAN-physical layer bus (will not need to be removed from network even for firmware reflash!) * free outputs ** power ** signal level (0..5V high resolution, external ground referenced) * extra inputs ** analog input ** RPM input (or vehicle-speed) * button Firmware features Since this is ment as an easy-to-use device, first only very few features are supported. * WBO2 * EGT (with cold-junction measurement) * onboard-temp * Data can be logged to PC for further analysis Some pins suggest boostcontrol function. Note that (although possible, the hardware supports it at the same time as WBO2 and EGT) there is no boostcontrol firmware code for it now. RPM input (VR or HALL, several trigger-types) will be supported in firmware later (currently not), eg. RPM is scheduled to be available in firmware in 2..3 months. I recommend to wait if you don't need the unit right now and know you'll need RPM ( though it should be a firmware-only change, the input voltage levels will be calibrated later in production making it easier to use ) * for logging * or (RPM-dependent) boost-target * or vehicle-speed sensor data can be sent over the network to GenBoard/VerThree even when both primary and secondary VR inputs of the v3.x are used up for the engine (the vehicle-speed and fuel consumption can be displayed and logged; also allows much better street-dyno implementation than without vehicle-speed) http://shop.vems.hu/catalog/images/Round_lambda_EGT_0003_s.jpg ---- '''Pinout''' '''RS232''' (standard DSUB9 female, pin2,3,5) * RX * TX * GND '''Main connector''' - DSUB15 male * 1: Vout (voltage output signal +) * 2: WBO2 pump- (Sensor pin 5) * 3: WBO2 nernst (Sensor pin 1) * 4: WBO2 pump+ (Sensor pin 6) * 5: WBO2 Rcal (Sensor pin 2, only one left, is this correct?) * 6: VBatt+ (12V) * 7: WBO2 heater-(Sensor pin 4) * 8: analog input * 9: Vout-gndref (voltage output signal) -. Connect to GND or max 2..5V potential (with higher voltage on this pin, max output voltage on Vout will be limited). * 10: RPM input * 11: RPM reference (input threshold can be adjusted; leave open) * 12: boost solenoid output (or other power output) max 5A, flyback towards supply * 13: GND connect all GND-s * 14: GND connect all GND-s * 15: GND connect all GND-s *Also wire supply voltage to WBO2 Heater to sensor pin 3 through 5A fuse ---- '''Mounting''' The flying loom version allows mounting even with the tightest available space: http://www.vems.hu/files/sensors/WBO2/Round_WBO2_EGT_Flyingloom_0007_m.jpg The upcoming mounting style uses an U bracket: http://www.vems.hu/files/sensors/WBO2/Upcoming_Mounting_Style_0007_m.jpg ---- '''OLD stuff ... TODO: cleanup''' The AfreshTiny was the working name for our first round 52mm WBo2 meter design. Same circuit can also be used for other functions, see AfreshTiny/OtherUses '''Input from user''' * How do we trigger the free air calibration? At all? (would be nice) * How do we choose between Lambda and AFR display? (or Celsius/Fahrenheit) * How do we choose vout curve? * How to insert "markpoints" in the datalog Because of the * analog inputs * button * network connection this is a software issue. Which ones do we need ? HW output (high vout resolution) allows either: * '''Industry standard, 0.65v@lambda=0.65, 1.5v@Lambda=1.5''' *NB sensor simulator, LSM11 reference curve. *Autronic standard, 0-1v= AFR10-30 ** 0-5v linear output, who use this? Note the significant amplitude difference between the scales. *old diy style 0..5V: 2.08V best power, 2.5V stoich. ** 0-5v linear output, who use this? Note the significant amplitude difference between the scales. * Linear WBO2 lambda outpout. It is very good usable with other ECU-s that hasn't got real WBO2 input, but can accept linear WBO2 signal! It is also usable if the other ECU has real WBO2 input but you don't want to use 2 WBO2 sensor. * Linear 0-5V EGT output. It could be also good usable with other ECU-s that can't accept the k-thermocouple signal directly. Note: besides the vout curve, the '''vout filter frequency''' would be nice if adjustable (when using it with other aftermarket systems, sometimes you want it almost unfiltered and sometimes you want it as slow as 1Hz.)
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