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Circuit Diagram of Raspberry Pi L298N Interface.

IN1/2/3/4: IN1/2/3/4 is the pin for the motor control.

EA/EB: EA/EB is the enable pin for the two motor A/B, the motor speed also can be controlled by the PWM of this pin.

Putting on the jumper enable the pull up resistor for the microcontroller, putting off it disable it. The power of logic circuit of the board is supplied by the 5V port when this jumper put off.

When the jumper is put on, The 78M05 supplies the 5V power for logic circuit on the board from the VMS port(7V < VMS < 18V).

5V: Power input for the logic circuit on the board.VMS: VMS is the 5V-35V power source for motor.CSB: The current test pin for motor B, this pin can be wired a resistor for current testing or tied a jumper to disable it.CSA: The current test pin for motor A, this pin can be wired a resistor for current testing or tied a jumper to disable it.Other extensions: current probe, controlling direction indicator, pull-up resistoer switch, logic part power supply.Enable signal level: Low -0.3V~1.5V, high: 2.3V~Vss.Controlling level: Low -0.3V~1.5V, high: 2.3V~Vss.Logic power output Vss: +5~+7V (internal supply +5V).An additional supply input is provided so that the logic works at a lower voltage. The emitters of the lower transistors of each bridge are connected together and the corresponding external terminal can be used for the con-nection of an external sensing resistor. Two enable inputs are provided to enable or disable the device independently of the input signals. It is a high voltage, high current dual full-bridge driver designed to accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors. Double H driver module uses ST L298N dual full-bridge driver, an integrated monolithic circuit in a 15- lead Multiwatt and PowerSO20 packages.