diff --git a/Hardware/microrusefi/Hardware_microRusEfi.md b/Hardware/microrusefi/Hardware_microRusEfi.md
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+microRusEfi is a highly integrated board for rusEfi ECU. microRusEfi is targeted at port injected
+gasoline engines with one, two, three or four cylinders. microRusEfi has means to control electronic throttle body.
+
+
+microRusEfi latest schematics is available at https://github.com/rusefi/hw_microRusEfi/blob/master/microRusEfi.pdf
+
+Complete set of board source files is available at https://github.com/rusefi/hw_microRusEfi
+
+Board overview:
+- about 10 analog inputs
+- One VR/Hall input channel for crank sensor
+- One Hall input channel for crank sensor
+- 4 injector output channels
+- 4 logic level coil control channels (external igniters could be needed for some coils)
+- USB
+- CAN
+
+
+For wiring see
diff --git a/Hardware/microrusefi/Hardware_microRusEfi_wiring.md b/Hardware/microrusefi/Hardware_microRusEfi_wiring.md
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+# Connector Pinout
+
+insert connector image/pins here
+
+# Pin Descriptions
+
+Each pin has a *Type ID*, which can be used to look up in the following tables what the pin is for, and what functions it can perform.
+
+| Pin Number | Name | Type ID | Default function |
+| ----------:|:-------- | ------- |:---------------------------------------------- |
+| 1 | **12V** | 12V | 12V supply |
+| 2 | **GND** | pgnd | Power GND |
+| 3 | **Lowside 2** | ls | Idle solenoid |
+| 4 | **ETB+** | etb | ETB+ |
+| 5 | **12V** | 12V | 12V supply |
+| 6 | **GND** | pgnd | Power GND |
+| 7 | **Lowside 1** | ls | VVT |
+| 8 | **ETB-** | etb | ETB- |
+| 9 | **Ignition 1** | ign | Ignition 1 |
+| 10 | **Ignition 2** | ign | Ignition 2 |
+| 11 | **Ignition 3** | ign | Ignition 3 |
+| 12 | **Ignition 4** | ign | Ignition 4 |
+| 13 | **GP out 6** | gp1 | Alternator |
+| 14 | **GP out 5** | gp1 | |
+| 15 | **USB D-** | usb | USB |
+| 16 | **USB D+** | usb | USB |
+| 17 | **GND** | sgnd | Signal GND |
+| 18 | **AN Temp 1** | at | CLT sensor |
+| 19 | **AN Volt 4** | av | |
+| 20 | **AN Volt 5** | av | |
+| 21 | **GND** | sgnd | Signal GND |
+| 22 | **AN Temp 4** | at | |
+| 23 | **AN Temp 2** | at | IAT sensor |
+| 24 | **AN Temp 3** | at | External wideband O2 sensor |
+| 25 | **Cam (hall)** | hall | |
+| 26 | **AN Volt 2** | av | TPS sensor |
+| 27 | **AN Volt 1** | av | MAP sensor |
+| 28 | **AN Volt 10** | av | |
+| 29 | **Main relay** | mr | Main relay |
+| 30 | **AN Volt 7** | av | |
+| 31 | **AN Volt 3** | av | |
+| 32 | **AN Volt 6** | av | |
+| 33 | **GP out 3** | gp2 | |
+| 34 | **GP out 2** | gp2 | Fan relay |
+| 35 | **GP out 1** | gp2 | Fuel pump relay |
+| 36 | **AN Volt 8** | av | |
+| 37 | **Injector 1** | inj | Injector 1 |
+| 38 | **Injector 2** | inj | Injector 2 |
+| 39 | **5V Sensor 2** | 5v | MAP sensor supply |
+| 40 | **AN Volt 9** | av | |
+| 41 | **Injector 3** | inj | Injector 3 |
+| 42 | **Injector 4** | inj | Injector 4 |
+| 43 | **GP out 4** | gp2 | |
+| 44 | **5V Sensor 1** | 5v | TPS sensor supply |
+| 45 | **VR+/Hall** | vr/hall | Crank VR+/hall |
+| 46 | **VR-** | vr | Crank VR- (do not connect if hall) |
+| 47 | **CAN low** | can | CAN bus |
+| 48 | **CAN high** | can | CAN bus |
+
+# Pin Types
+
+These tables provide technical information about the different types of pin found on microrusEfi.
+
+## Power
+
+| ID | Type | Notes & Limits |
+|----|-------------| ---- |
+| 12V | Power supply | 9-22V operating, 5A fuse recommended |
+| pgnd | Power ground | Solidly ground directly to chassis or engine block. |
+| sgnd | Signal ground | Sensor ground. ***Do not ground to engine!***
+| 5v | 5V sensor supply | 5V supply for external sensors. 200mA maximum per pin.
+
+## Input
+
+| ID | Type | Notes & Limits | Possible functions |
+|------|---------------------| ------------------------------------------------------------------------------------ | --- |
+| at | Analog temperature | Analog temperature (thermistor) input. 2.7k/TBD pullup resistor to 5v | Thermistor temperature sensor, fuel level sender (variable resistor type) |
+| av | Analog voltage | Analog voltage input. 500k pull down to GND | Analog voltage sensor (MAP, TPS, acc pedal, oil pressure, etc)
+| vr | Variable reluctor | VR crank input | VR sensors including crank, cam, vehicle speed
+| hall | Hall cam/crank | TBD pull up to 5v hall sensor for cam/crank | Hall sensors including crank, cam, vehicle speed
+
+## Output
+
+| ID | Type | Notes & Limits | Possible functions |
+|----|-------------| ---- | --- |
+| inj | Injector output | Low side, 2.2A maximum
**Only saturated (high impedance) injectors are supported.** | Injector, general purpose low side |
+| ign | Ignition output | 5V push-pull, 250mA maximum | Ignition coil, general purpose 5V push-pull
+| ls | High power low side | General purpose low side output, 4.5A maximum | General purpose low side, injector
+| gp1 | General purpose push-pull | General purpose push-pull output, 5V/12V (internally selectable) 250mA maximum | General purpose 5V/12V push-pull, ignition coil
+| gp2 | General purpose push-pull | General purpose push-pull output, 12V 500mA maximum | General purpose 12V push-pull
+| mr | Main relay | Dedicated main relay output. Low side turned on with power, 800mA maximum. | Main relay
+| etb | Electronic throttle | Dedicated electronic throttle outputs. Connect a brushed motor
throttle body directly to these two pins.
+
+## Communication
+
+| ID | Type | Notes & Limits |
+|----|-------------| ---- |
+| usb | USB | USB tuning interface
+| can | CAN bus | CAN communication
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