The board has two independent H-bridges implemented with power FETs. For every four IRF3205S power FETs there are two IRF2104 half-bridge drivers.

The H-bridge can be driven simply with logical 0 and 1 levels on the direction pin and a PWM signal on the speed pin. Each bridge has its own pins. Two motors can therefore be driven completely independently.

Note! Requires a PWM signal on pins P_1 and P_2 with a duty cycle of 0-99%. 100% i.e. full voltage (logic 1) does not work with the IR2104 driver circuit.

Features

• based on IRF3205S MOSFET (current handling up to 110A)
• based on H-bridge driver ICs IR2104
• double-thickness copper 70um (= 2 oz cupper thickness)
• operating voltage: 6-22V
• output current: 8A continuous, 15A peak
• PWM duty cycle: 0-99%
• motor voltages: 6-22V
• logic levels: 5V
• motor connections and power supply via screw terminals
• indicator LED for motor power
• reserves Arduino pins:
  • motor 1: D4, D5, D9, D6
  • motor 2: D7, D8, D10, D6

Links

• IR2104 Datasheet
• IRF3205 Datasheet
• Elecrow Wiki Page
• Elecrow Schematics