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Testing Arduino motor shield with servo motor

Arduino motor shield

Recently I’ve got an Arduino motor shield. It is based on ladyada first mshield circuit. It uses two famous L293D quadruple half-H divers. It is a cheap and reliable shield to drive various motors. These can be two hobby servo motors, four bidirectional DC motors, or 2 (unipolar or bipolar) stepper motors. The load current is limited to L293D chips. The specification says that each channel can provide a constant 0.6A and peak 1.2A. There is also a thermal shutdown to prevent the circuit from damaging. Motors can be externally powered using a voltage range from 4.5V to 36V. Each motor control channel is pulled down with a resistor to disable any motor at power-up. In this post, we are going to try servo motor control. There are a couple of connectors on the motor shield where you can connect two servo motors using a standard 3 wire connector (GND, VCC, and PWM).

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