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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 controls to the ICs and PWM outputs from the CPU connect to the driver enable inputs.
PWM
| Motor | Motor # | Arduino | UNO | MEGA2560 |
|---|---|---|---|---|
| Servo | 1 | 9 | Timer1A PB1 | Timer2B PH6 |
| Servo | 2 | 10 | Timer1B PB2 | Timer2A PB4 |
| 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 |
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 | STROBE | D12 | PB4 | PB6 |
| SHCP | SHIFT | D4 | PD4 | PG5 |
| !OE | 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 |
