Smart-Round-Dual was the
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
- 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.
- 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)
Pinout
RS232 (standard DSUB9 female, pin2,3,5)
- RX
- TX
- GND
Main connector - DSUB15 male
- 1: Vout (voltage output signal +)
- 2: WBO2 pump-
- 3: WBO2 nernst
- 4: WBO2 pump+
- 5: WBO2 Rcal
- 6: VBatt+ (12V)
- 7: WBO2 heater-
- 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
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.
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.)