The 203 Motor Driver provides a simple digital interface to a pair of low current DC Brush Motors. Requiring only a pair of I/O lines per motor, it is ideal for use with microcontrollers such as the Parallax Basic Stamptm, Microchip PICmicrotm, Atmel AVRtm, etc.

Both motor speed and direction are controllable. Motor speed is variable by adjusting the duty cycle of the PWM input. Potential applications include robotics, home automation, or anywhere an extremely compact motor driver is needed.

Features:

  • Miniature Size, cirka 2*2cm.
  • Screw Terminals for Simple Power Hookup
  • Ribbon Cable Logic Level Inputs
  • Completely Assembled - Not a Kit
  • Simple Interface Reduces Microcontroller I/O Count

Technical Specifications:
Technical Specifications:

 Power Input & Output
 

 Min

 Max

 Units
Vcc (Logic Power Supply)

4.5

5.5

 VDC
Vmotor (Motor Power Supply)

4.5

35

 VDC
Iout (per channel)

-

800

 mA
Vhigh (Logic Input High) 

2

5.5

 VDC
Vlow (Logic Input Low)

0

.8

 VDC

 Logic Truth Table
 

PWM-A

DIR-A

PWM-B

DIR-B
 Motor A Off

Low

 -

 -

 -
 Motor A Forward

High

High

 -

 -
 Motor A Reverse

High

Low

 -

 -
 Motor B Off

 -

 -

Low

 -
 Motor B Forward

 -

 -

High

High
 Motor B Reverse

 -

 -

High

Low
The Duty Cycle of the PWM Input can be altered to set motor speed.

Connector Pinouts

P1 - Logic Input

 1  Logic Gnd
 2  Vcc
 3  PWM-A
 4  DIR-A
 5  PWM-B
 6  DIR-B
 7 - 10  Not Connected

J1 Power Input

 1  Power Ground
 2  Vmotor

J2 Motor Output

 1  Motor Output A+
 2  Motor Output A-
 3  Motor Output B+
 4  Motor Output B-

Notes:
1) Pin #1 is denoted by a square pad on the PCB.
2) Only .1" / 2.54 mm of insulation should be stripped from the wire prior to inserting it into the screw terminal such that both the wire and insulation are crimped into the connector. This method provides a solid mechanical connection.
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Senast uppdaterad den 20:e Oktober 2000.