AFreshTiny (2015-01-01 07:00:00)

AFreshTiny

Formerly known as Smart-Round-Dual, 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


Firmware Releases

Recent [vemstune] supports round firmware upgrade and operation with the non-AIM firmware (round firmware is also shipped inside, and ini also).

The AIM capable firmwares uses the Megatune (zipped in with the firmware)

The stable release:

Non-AIM: [round_2010-04-07.zip] (1.4.3)

AIM: [round_2009-10-12.zip] (0.4.0)

Old releases : http://www.vems.hu/download/round/


New features supported since 2010-03-29 firmware


Related Software


Documentation

Warning: the WBO2 sensor in the exhaust is ruined quickly if not heated. When the engine is running, keep the controller running too (so it keeps the sensor heated) or remove the sensor from the exhaust (and use a M18x1.5 mm plug).

Mounting

Allows mounting even with the tightest available space:

Round_WBO2_EGT_Flyingloom_0007_m.jpg

DSCN1145s.jpg

U-bracket mounting bracket:

Upcoming_Mounting_Style_0007_m.jpg

The simple factory "harness" (with the DSUB15 female) only has supply wires and a fuse:

To connect for the WBO2 and EGT functionality is trivial (including datalogging with PC). The RPM input and voltage output has some options, detailed below (these functions are rarely used, but sometimes very useful).

The manufactured version features:

Firmware features

Since this is meant as an easy-to-use device, first only very few features are supported.

RPM input (VR or HALL, several trigger-types)

Round_lambda_EGT_0003_s.jpg

Free air calibration

The RCal resistor in the sensor is supported, so calibration is not necessary. The optimal PID parameters are different in the exhaust stream and free air, so don't worry if free air reading is slightly off or even floating somewhat. Note that toleration in the lamdba range is very good: 5% error means (actual => reading) 0.8 => 0.81 lambda (since the difference from lambda=1.0 counts, which is 0.2 and 0.19 respectively).


Connector Pinouts

RS232 - DSUB9 female. Note that any extension cable needs to be straight through and not cross-over.

Main connector - DSUB15 male. Note that the (now standard) flying loom version has the WBO2 pins on the WBO2 connector, so those 5 pins (pin 2,3,4,5 and 7) of the DSUB15 are NOT connected:

15PinPort.png

More printable user-guides are at: http://vems.hu/download/round/docs/