# microRusEFI Kit Instructions this page is outdated - rusEFI no longer sells microRusEFI as a kit ## Initial kit state All kit PCBs come pre-programmed and verified. No firmware upload required right after soldering. Actually your microRusEFI would communicate via USB if you solder just USB connector or feed USB via 48 pin connector. [VIDEO Initial state](https://www.youtube.com/watch?v=3vWbIECoLg8) [VIDEO testing with test fixture](https://www.youtube.com/watch?v=pAaNUaCQaz0) ## HOWTO microRusEFI Kit [microRusEFI kit](https://www.ebay.com/itm/333517397424) comes 75% assembled - while many components are already mounted, about two dozens still need to be added. This includes both easy to mount components like main connector and harder to solder TLE8888 100-pin chip. Some soldering hints and tricks [are discussed here](https://rusefi.com/forum/viewtopic.php?t=425). If in doubt of your SMD skills please consider fully assembled version. For component placement please use interactive BOM [0.5.3](https://rusefi.com/docs/ibom/micro_rusEFI_R0.5.3.html) [0.5.2](https://rusefi.com/docs/ibom/micro_rusEFI_R0.5.2.html) [0.5.1](https://rusefi.com/docs/ibom/micro_rusEFI_R0.5.1.html) [0.5.0](https://rusefi.com/docs/ibom/micro_rusEFI_0.5.0.html) [0.4.8](https://rusefi.com/docs/ibom/microRusEfi_R0.4.8.html) [0.4.7](https://rusefi.com/docs/ibom/microRusEfi_R0.4.7.html) [Some checkpoints](Hardware/microRusEFI/Hardware_microRusEFI_0_4_7_front_checks.jpg) All microRusEFI kits use [MRE F4 rusEFI firmware - DOWNLOAD LATEST BUNDLE HERE](https://rusefi.com/build_server/rusefi_bundle_mre_f4.zip) [Wiring Diagram](Hardware-microRusEFI-wiring) [0.5.0 schematics PDF](https://github.com/rusefi/hw_microRusEfi/blob/master/micro_rusEFI_Schematic_0_5_0.pdf) [0.4.8 schematics PDF](https://github.com/rusefi/hw_microRusEfi/blob/master/microRusEfi_Schematic_0_4_8.pdf) [0.4.7 schematics PDF](https://github.com/rusefi/hw_microRusEfi/blob/master/microRusEfi_Schematic_0_4_7.pdf) [rusEFI Slack channel](https://rusefi.com/forum/viewtopic.php?f=13&t=1198) is the primary support channel. [HOWTO program rusEFI using DFU](HOWTO-DFU) ## Crankshaft position sensor options: Hall or VR Depending on your crankshaft position sensor type you would need to populate either Hall or VR option. 0.4.5, 0.4.7: For VR crankshaft position sensor you would need to add R9 & C12 on the back. 0.4.8: Comes set for VR (R9 & C12 are now on the front since) VR mode front - comes pre-assembled ![Back](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_vr_front.png) VR mode back ![Back](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_vr_back.jpg) 0.4.5, 0.4.7: For Hall, you would need to REMOVE R15 & C35 on the front, and install R17=1.5K R18=R19=4.7K on the back. 0.4.8: For Hall, you would need to REMOVE R15&R9, C12 & C35 on the front, and install R17=1.5K R18=R19=4.7K on the back. 0.5.0 Hall ![Front](Hardware/microRusEFI/Hardware_microRusEFI_0.5.0_hall_mode.jpg) 0.4.7 Hall mode front ![Front](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_hall_front.jpg) 0.4.7 Hall mode back ![Back](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_hall_back.png) ## Board Photos ![F](Hardware/microRusEFI/Hardware_microRusEFI_0.5.3_assembled_front.jpg) ![F](Hardware/microRusEFI/Hardware_microRusEFI_0.5.0_module_assembled_front.jpg) Kit front: ![Front](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_pre_assembled_front.jpg) Kit parts on the front: ![Front](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_kit_front.jpg) Kit parts on the back: ![Back](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_kit_assembled_back.jpg) ## Diodes 0.4.7 Flyback diodes orientation around version 0.4.7 - horizontal facing OPPOSITE direction ![Back](Hardware/microRusEFI/Hardware_microRusEFI_0.4.7_kit_diodes_orientation.jpg) ## Diodes 0.5.2 Flyback diodes orientation around version 0.5.2 - angles, facing SAME direction ![Back](Hardware/microRusEFI/Hardware_microRusEFI_0.5.2_kit_diodes_orientation.jpg) ## Important details 0.4.5, 0.4.7: JP1 needs to be TBDsee see [https://github.com/rusefi/hw_microRusEfi/issues/127](https://github.com/rusefi/hw_microRusEfi/issues/127) Unpopulated parts which you probably do NOT need: LIN termination D43 R10 RTC diode D42 Wake-up CAN R8 [More images](https://github.com/rusefi/hw_microRusEfi/blob/master/gerbers) ## Direct board programming J7 header in bottom-left corner of microRusEFI allows direct SWD programming using TC2030-MCP-NL cable Tag Connect In circuit Cable "NO Legs" Version ![x](Hardware/microRusEFI/TC2030_SWD.jpg) ### Note - Missing wire caps In the even of a missing wire cap on the molex plug the correct part number is 64320-1301 and these can be easily sourced online