RJB Auto Electronics

RJB Auto Electronics

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24/10/2025

Bit more done on my 0.3 Ulitmate board tonight

IO list:

Air temp (with adjustable bias).
Water temp (with adjustable bias).
TPS.
Map (onboard option).
O2 (onboard Tiny Wideband option).
Fuel flex D2 (or table switch).
Knock D3 (external module needed).
Clutch/Launch switch input.
12v idle up input (for AC/Fan/heated windscreen).
Oil pressure.
Oil temp (with adjustable bias).
Fuel pressure.
Fuel temp (with adjustable bias).
Fuel tank level or ambient/pre intercooler Air temp (with adjustable bias).
Spare input (with pull-up).
4x injection.
4x ignition.
4wire idle.
Idle1.
Idle2.
VVT.
Boost.
Fan.
Pump.
Spare output 1 (shift light).
Spare output 2 (overboost light).
VR crank (or hall).
VR cam (or hall).
VR VSS (or hall).
BT.

Has a Hammond case with mounting tabs and clear lid, cable entry point centre bottom between terminals.
18x14cm, 15mm tall

Ideal for bench setup etc.

Probably won’t find another wireable board with this much IO, can be used on Speeduino, RUS or EPIC firmware.

£225 or
£300 with dual VR, BT and Tiny Wideband added.

Ideal for bench setup where wires may need changing around for testing etc

Photos from RJB Auto Electronics's post 21/10/2025

New board ready for testing 🙂 no more NO2C when this is easier to make and the case is easier to do. Plus more IO than the stock 0.4.3c speeduino board

17/10/2025

Well, after studying RUSEFI and EPIC EFI firmware on a Mega100 Blue PCB (STM32F407) i got my hands on this week i can happily say i will be providing a new board that will support Speeduino (inc STM32F4 FW) / RUSEFI / EPIC firmware options.

Running RUS or EPIC (I prefer EPIC as easier to work the menu's) will allow upto 8cyl full sequential with huge VE and Timing tables, with the additions of Knock detection, DBW, PWM Water pump, EGT and CANBUS, plus more.

With small mods to my current boards (ULN replaced for one that supports 3.3v) you can already run RUS or EPIC FW (basetune created ready and bench tested for EPIC), i will make a knock sensor PCB that can use the 4wire idle socked and socket pins to add knock to my boards already out there thould someone want to swap to the Mega 100 or Mega144 (144 pending a base tune doing with correct pinouts but easy to sort).

Fun times ahead :-)

Photos from RJB Auto Electronics's post 16/09/2025

new design out soon, all the speeduino 0.4 basics and extra IO as always using a mixture of the NO2C parts and a mini Mega Pro, BlueTooth socket to support the DIY-EFI BT module, the little black box is only 120x80x35mm and assembly only requires one bit of plastic to be cut out making assembly super easy.

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