Table of Contents
AF Motor Shield V1
No longer in production but available as various clones, this board can drive two 5V servos and up to 4 motors attached to two L293D driver ICs.
A shift register is used to provide the direction inputs to the ICs and PWM outputs from the CPU connect to the driver enable inputs to control the motor power (speed).
PWM
| Motor | Motor # | Arduino | UNO | MEGA2560 |
|---|---|---|---|---|
| Servo | 1 | 10 | Timer1B PB2 | Timer2A PB4 |
| Servo | 2 | 9 | Timer1A PB1 | Timer2B PH6 |
| L293D IC1 1,2EN | 1 | 11 | Timer2A PB3 | Timer1A PB5 |
| L293D IC1 3,4EN | 2 | 3 | Timer2B PD3 | Timer3C PE5 |
| L293D IC2 3,4EN | 3 | 6 | Timer0A PD6 | Timer4A PH3 |
| L293D IC2 1,2EN | 4 | 5 | Timer0B PD5 | Timer3A PE3 |
L293D
1,2EN 1-----16 VCC1 1A 2 15 4A 1Y 3 14 4Y GND 4 13 GND GND 5 12 GND 2Y 6 11 3Y 2A 7 10 3A VCC2 8-----9 3,4EN
Shift register
Q1 1-------16 VCC Q2 2 15 Q0 Q3 3 14 DS Q4 4 13 !OE Q5 5 12 STCP Q6 6 11 SHCP Q7 7 10 !MR GND 8-------9 Q7S
| 74HCT595 | Function | Arduino | UNO | MEGA2560 |
|---|---|---|---|---|
| STCP | STORAGE CLOCK | D12 | PB4 | PB6 |
| SHCP | SHIFT CLOCK | D4 | PD4 | PG5 |
| !OE | O/P ENABLE | D7 | PD7 | PH4 |
| DS | DATA | D8 | PB0 | PH5 |
| Q | Input | Motor # |
|---|---|---|
| 0 | L293D IC2 1A | 4 |
| 1 | L293D IC1 4A | 2 |
| 2 | L293D IC1 1A | 1 |
| 3 | L293D IC1 2A | 1 |
| 4 | L293D IC1 3A | 2 |
| 5 | L293D IC2 4A | 3 |
| 6 | L293D IC2 2A | 4 |
| 7 | L293D IC2 3A | 3 |