Autosport Labs

Here's what I have found. There is a slight error when using a relay off any of the user outputs if that relay has a permanent feed as it will power up the MJLJ unit. This is due to the way the 12V line from Pin9 of the ULN2003A is connected to the input of the Voltage regulator IC. See attached dia...

Also, for using the tablet etc. could the table of values expand to fill the space rather than staying small in the top left corner? Would make using the touch screen a lot easier.

And the verdict is... Success.

This was all because my relay has a permanent live feed to allow manual override and operation with the ignition off after a long run...

I've been looking at the data sheet for the ULN2003. The internal freewheeling diodes will allow 12V through from the outputs to the 'safe 12V' line of the mjlj which I think is powering it up. My next trial will be to remove pin 9 from the circuit and add the freewheeling diode at the relay instead...

I'm running an experiment on my desk with my spare V3 unit. Currently I have only 2 wires to it connected to Gnd and User Out 1. User Out 1 is connected to pin 85 of a standard automotive relay. Pin 86 is connected to 12V as per the diagram listed above. The coil has a resistance of circa 75 ohms. T...

It's wired exactly as the diagram in the installation pages with user out 1 connected to a relay coil with the other side of the relay coil to a permanent 12V https://wiki.autosportlabs.com/File:MJLJ_User_output_examples.png This puts 12V on user out 1 and powers up the unit even though there is no ...

Having an absolute nightmare with this. With the ignition off and no power to the mjlj at all, the feed through the relay to user out 1 is switching the mjlj on. With a diode in circuit it stops this, but user out 1 will then not switch on the relay. How do I stop this happening? If I switch the 12V...

I think I've sussed it... I've wired a relay as per the instruction in the installation guide so that user out 1 is controlling a relay that has 12V permanently to the other side if the coil. Unfortunately, this seems to feed UO1 with 12Volts and actually powers on the mjlj. Hopefully the addition o...

Trying to control a cooling fan with user out 1 set to trigger from aux (go to ground) at 88 degrees. I've wired as per the diagram in the instructions but have noticed that when no power is there to the mjlj the outputs go to ground which switches my fan on permanently. Is this correct? Currently l...

Could there be an option in the tuner software to display the aux readout as just the corrected figure in a digital gauge like the others rather than just the analogue 0-255? This would be useful for reading the temperature etc. 'at a glance' rather than looking at the centre of a cluttered gauge fo...

I did, but I had to buy a Windows tablet that runs a full version of Windows so I could use the standard configurator program. I got the Linx10 then constructed a Bluetooth module to plug into to my 9 pin com port (V3). hardware mods required to the board though for power and comms avoiding the RS23...

It's a Linx 10. Only just come out over here. Seems to have good reviews so far.

It was a long wait but well worth it. I think the Windows 8.1 platform on the 10" screen will give me more scope to mess around than with an app on a 5" Android phone screen... and for the bargain price of £180 including the Bluetooth adaptor, case, 9 pin plug and the tablet. The laptop is...

Got this done sooner than expected... Hardware mods... +5V from Vref to pin 1 of the serial port. Pins 11 and 12 of the MAX232 to pins 7 and 8 of the serial port. This gets the TTL signals out very neatly, BUT it means that if you wish to connect via a cable, you MUST use a home made one that only c...

I'm using a 'Linx10' windows tablet. As it seems to run a full version of windows 8.1 the existing PC software (only tried 3.3.2) works fine and uses the Bluetooth just fine too. These tablets are new to the market and are around £160. The 8" version is around £80.