m10_mini_dc_control

m10 mini dc control

This control board designed to precisely control the 9161C geared M10 mini motor with extended shaft.

Usage

In general you just need to connect the board to your I2C bus and power it with 5V of power (in theory voltage regulator allows 2.5-5.5V so the motor can work on lower voltages with slower speed).

You will need to modify the I2C_SLAVE_ADDRESS in firmware, compile it (or use the predefined one) and flash to the MK. After that you will be able to use as many motors as you want.

Firmware

TODO

Components

• 3V Micro Planetary Reducer Motor (9161C) - target motor with plastic reduction gearbox

• ATTiny 13A MMFR (DFN-10 3x3mm) - microcontroller to interface I2C and control the driver

• DRV8837C DSGR (WSON) - H-bridge driver for the motor

• MIC5365-3.3YMT-TZ (Thin MLF (MT)) - 5V to 3.3V voltage regulator to power the MK and driver logic

• QRE1113GR (100CY) - reflective object sensor to detect the motor rotation

• Various 0201 and 0402 resistors, caps and a LED

• (optional) Electrolitic capacitor to store the rest power from the motor (check driver DS)

3V Micro Planetary Reducer Motor (9161C)

Price: $1.8 ($9 for 5pc)

Motor specifications:

• Reduction ratio: 1:171

• Rated torque: 9.8 mN.m

• Maximum torque: 37.2 mN.m

• Rated voltage: 2.5V DC

• No-load current: 40mA

• No-load speed: 92 RPM

• Dimensions: 8x10x12mm (M10 motor)

• Planetary gearbox outer diameter: 9.9mm

• Weight: 4 grams

• Geared motor height: 19.5mm (motor + gear box)

• Output shaft: Gear with an outer diameter of 5.35mm (11 teeth)

The following measures the motor speed under other voltages:

• Voltage: 3V
  • Current: 42mA
  • Speed: 110 RPM
• Voltage: 3.7V
  • Current: 48mA
  • Speed: 135 RPM
• Voltage: 4.2V
  • Current: 52mA
  • Speed: 154 RPM
• Voltage: 5V
  • Current: 58mA
  • Speed: 180 RPM

How to order

Just go to your favorite PCB manufacturer and order as many boards as you want.

• PCBWay