There is no difference in program or connection vice while using the L293D IC directly or through a module.Р”В¬onnect the 4 inputs and 2 enable pins to the respective digital output pins of the arduinoР’В as declared in the code. L293D Motor Driver modules usually come with an inbuilt Lm317 voltage regulator circuit or similar voltage regulating circuit, along with connectors. Hence low current input signals can switch these devices and operate in the same way as an H bridge circuit works.Р”Вriver IC L293D is available as module and Arduino shield. Driver IC or a driver circuit is a similar H bridge arrangement instead of switches replaced with transistors, MOSFETs, etc. Simply, what a motor driver does is it act as a current amplifier which gives high current outputs to drive the motor from a low current control signal. The s1 and s3, s2 and s4 are not permitted to close at a time as it will short circuit the supply. The IC L293D works with an H bridge arrangement, which can alternate the polarity across a load or change the direction of the current. Pin 16: Vcc1 РІР‚вЂњ 5V supply for the functioning of the IC.

All the inputs are permitted only up to a maximum of 7V. Pin 15: Input 4 РІР‚вЂњ Input to control the output 4. Pin 14: Output 4 РІР‚вЂњ Connected to the remaining terminal of the motor 1. Pin 13: GND РІР‚вЂњ Heatsink and Ground Connection.Р’В The Ground terminals should be soldered to a metallic area in the PCB which is enough to transfer the heat generated. Pin 12: GND РІР‚вЂњ Heatsink and Ground Connection. Pin 11: Output 3 РІР‚вЂњ Connected to one of the terminals of the motor 2 motor 2 РІР‚вЂњ connected across the output 3 and 4. Pin 10: Input 3 РІР‚вЂњ Digital input to control the output 3. It is to enable and disable the driver channels 3 and 4. Pin 9: Enable3,4 РІР‚вЂњ It is also an active high input. The supply must be connected to a source capable enough to drive the current requirement of the load. Pin 8: Vcc2 РІР‚вЂњ Supply to the motors, 4.5V to 36V. Pin 7: Input 2 РІР‚вЂњ Digital input to control the output 2. Motor terminals should be connected with respect to the inputs assigned. Pin 6: Output 2 РІР‚вЂњ Connected to the remaining terminal of the motor 1. Pin 5: GND РІР‚вЂњ Heatsink and Ground Connection. The GND connection itself used as the heat sink to disperse the heat. Pin 4: GND РІР‚вЂњ Heatsink and Ground Connection. Pin 3: Output 1 РІР‚вЂњ Connected to one of the terminals of the motor 1 motor 1 РІР‚вЂњ connected across the output 1 and 2.

L293d motor driver circuit