# 3. Mini v2 node hardware
Mini node is the CAN-PWM converter designed to control 1-4 ESC or servo. Since the node has a built-in DC-DC, a servo can be powered through it. The board also supports receiving feedback from the esc flame.
|View||Top view||Bot view|
# 3.1. Features
- 4 PWM outputs
- 2 ampers thrupass current
- Input voltage sensor
- 5v rail voltage sensor
- CAN connectors: 2 UCANPHY Micro (JST-GH 4) (opens new window), 2 6-pin Molex (opens new window)
- Weight: 6.6 g (with cable 8 g)
- LxWxH: 42x27x12 mm
# 3.2. Wire
Schematic can be provided via e-mail request or issue on github.
|1||UCANPHY Micro (JST-GH 4)||Devices that deliver power to the bus are required to provide 4.9–5.5 V on the bus power line, 5.0 V nominal. Devices that are powered from the bus should expect 4.0–5.5 V on the bus power line. The current shall not exceed 1 A per connector.|
|2||6-pin Molex (502585-0670 (opens new window), 502578-0600 (opens new window))||Contacts support up to 100 V, 2 A per contact. But the board may work only with 2S-6S.|
|3||SWD||STM32 firmware updating using programmer-sniffer.|
|4||PWM1, PWM2, PWM3, PWM4||Connectors should be used to deliver signal and power (below 1 amp) to payload such as SERVO or ESC (without power delivery)|
Here (opens new window) you can find manufacturer part number of connectors it self and its mates.
Pin configuration and functions
|3||CAN High||3||CAN Low||SWDIO|
# 3.3. Specifications
Scheme is shown on the picture below.
|Width, mm||Length, mm||Height, mm|
Total weight of device is 6.6 g.
You can download 3D model on GrabCAD (opens new window)
Information about case presented here.
Absolute Maximum Ratings
|V (CAN2, CAN3)||4.5||5.5||V|
*Noted Voltage should be delivered only with current limitation under 2.5 Amp.
Recommended operating conditions
|V (CAN1, CAN2)||5||V|
|Human-body model (HBM)||2000||V|
|Charged-device model (CDM)||500||V|
# 3.4. Description
Here you can see all connections of MCU.
|PA0||INTERNAL ANALOG||Measuring Vin using ADC|
|PA1||INTERNAL ANALOG||Measuring 5V3 using ADC|
|PB1||INTERNAL ANALOG||Measuring voltage devider that represents VERSION of hardware using ADC|
|PA11||INTERNAL DIGITAL||CAN RX|
|PA12||INTERNAL DIGITAL||CAN TX|
|PA4||INTERNAL DIGITAL||BLUE LED|
|PA8||INTERNAL DIGITAL||GREEN LED|
|PA15||INTERNAL DIGITAL||RED LED|
|PB7||EXTERNAL DIGITAL||PWM1 / SDA / RX1|
|PB6||EXTERNAL DIGITAL||PWM2 / SCL / TX1|
|PA2||EXTERNAL DIGITAL/ANALOG||TX2 (RX2 in one wire mode) / ADC CH2|
# Functional Block Diagram
# Connection example diagram
# 3.5. Power Supply Recommendations
Device is designed to operate from an input voltage supply range between 4.5 V and 5.5 V over CAN-LV connector, or 5.5 - 30 V from CAN-HV. This input supply must be able to withstand the maximum input current and maintain a stable voltage. The resistance of the input supply rail should be low enough that an input current transient does not cause a high enough drop that can cause a false UVLO fault triggering and system reset. The amount of bulk capacitance is not critical, but a 47-μF or 100-μF electrolytic capacitor is a typical choice.
# 3.6. Revision history
|v2.1.1||Oct 9, 2022||Add back diode to 5v LDO|
|v2.0||Jun 12, 2022||Add RGB LED, make smaller topology of PCB. Note: can't be powered from CAN jst-4 pins connector|