WBo2 2Y DIY Wideband Unit

WBo2 version 2Y, introduced in February 2008, is Tech Edge's latest DIY product. Easy to construct with some pre-built and tested modules, low cost, and 100% professional appearance. Lambda (AFR), 3 outputs, RPM input, 6 analogue inputs and (optional) on-board logging are available in DIY kit format. If you want a low cost unit but don't want to build it yourself then look at the 2J controller.

2Y on-line information will be updated throughout 2009.

The 2Y series is the first dedicated DIY controller we've offered. 2Y is not available from us in pre-built and tested form but we encourage others to do this for themselves and for others. In fact we offer free links to people who have demonstrated they are capable of building and supporting the 2Y controller for sale to others.

There is also a healthy user support forum at wbo2forum.com, where questions may be quickly answered by Tech Edge staff, build walkthroughs posted from other users, and discussions on building and using the 2Y kit may be found.

Buy the 2Y1 (basic DIY kit) from AU$99 (2Y1M from $125)

with cable kit and connector kit. With and sensor.

DIY 2Y1 kit DIY Cable Sensor connector kit DIY Display with Sensor

Total price of selected item(s) : quantity : ...

2Y Features

The 2Y DIY controller is presented in a tough ABS plastic case. The controller is based on our original 2A0 design (thousands sold worldwide since 2003) and is enhanced in the following ways

  • Processor upgrade from 2A0 (as on 2A1) - uses enhanced LSU drive circuitry.
  • All outputs and extra inputs are present on a 10 pin connector on the side.
  • A label clearly shows the function of each pin.
  • An additional RJ45 connector gives two serial connection points (but one serial port)
  • 8 pin end connector with three 0-5 Volt inputs and three thermocouple inputs.
  • 5 Volt power (dedicated regulator) to power external devices/sensors.
  • Accuracy within 0.1 AFR (Lambda +/- 0.005).
  • 10.5 to 19.5 Volt DC operation (up to 3 Amps).
  • Uses LSU 4.0/4.2 (Bosch 6066/7057 family) or NTK (L1H1/L2H2) sensor.
  • WBlin Configurable wideband 5 Volt output (12 bit accuracy).
  • SVout for LD01 display (10 bit configurable too).
  • NBsim narrowband (10 bit configurable too).
  • Optional On-board 1 M Byte logging memory and RS232 logging to PC, etc.
  • 3 analogue 0 to 5 Volt inputs sampled at up to 40/sec.
  • 3 thermocouple inputs.
  • RPM input from Tacho or ECU for logging, or COIL input from Ignition Coil.
  • Free logging software (optional extra feature upgrade available).

Pre-Built Modules Simplifies Construction

A feature of the 2Y controller is the use of a pre-built Lambda-module. The module is constructed with SMD components and comes factory tested. It makes construction simpler and the chance of success much higher than the original DIY 2A0.

The SMD Lambda-module is readily replaced but our experience with SMD construction suggests this will be the last item to cause problems. The Lambda-module includes a 2 position jumper shunt to select either the LSU or NTK families of wideband sensors. (firmware must be changed if the sensor family is changed) Another 2 position jumper shunt selects between LSU-4.2 (which includes the LSU-4.0 sensor) and the newer LSU-4.9 sensors.

On current production Lambda modules, these shunts are located on the bottom (solder side) of the board. The lambda module is removed, by unscrewing two M3 bolts, to change the position of these jumpers. The Lambda-module is supplied with the row of 25 header pins still to be soldered on so they protrude from the bottom of the module.

The image at right is the optional on-board-memory module which holds 1 M byte - enough for many minutes of logging at high log rates. The logger module includes an onboard activity LED to aid in quickly identifying problems. Faulty modules can be swapped for a factory replacement without sending the entire WBO2 unit in for repair. Click on the image to enlarge it.

Easy to Construct, Fewer Components

Here are two more views of the unit clearly showing the pre-built Lambda-module and the place for the memory-module connector (look for label logger module on the PCB).

The unpopulated area at one end of the case is for display components that are not included in the 2Y1.

Note the lower component count compared with the 2A0 (image).

Builders of our original 2A0 or 2A1 should note that the new DIY kits come (optionally) with our new DIY cable kits. The new lower cost and better quality cable kits use a new one piece cable we had especially manufactured for us. A correctly built cable will greatly enhance the duarability and reliability of your DIY unit. This is backed up by our finding that up to 80 percent of problems with DIY kits was due to problems with the cable.

2Y User Manual

Go here for the 2Y User Manual page.

At right is shown the 2Y with the pre-built Lambda module removed. The enlarged image (click the image) clearly shows the components uder the module. Note the two nylon standoffs that hold two corners of the lambda module.

Equally notable are the components missing from the image. The memory module is not shown but the position for the connector is clearly visible. Note also there is no U2 EEPROM - this component is NOT used on the 2Y1.

Further Information

We update 2Y documentation from time-to-time in response to your feedback (see footer below).