43
greater torque,so it can meet the system requirements. Combined with these advantages, in the "Hummer-Bot"
car, we selected four DC motors as the power source.
Motor drive - it is a necessary condition for the motor to play its superior performance. Its main function
is to provide sufficient current and power for the motor. In the "Hummer-Bot" car, we choose the L298N as
the motor driver chip for it is a high voltage and current full-bridge driver chip, the chip uses 15 pins package.
It is a special motor driven integrated circuit (two H bridges) with high voltage and current full-bridge
driver.And it contains 4 channel logic drive circuit, basically belongs to a kind of two-phase and four-phase
special motor drive which contains two H bridges of high voltage large current. The output current is 2A, the
maximum current is 4A, the maximum working voltage is 50V, which can drive the load under 46V and
2A,such as high power DC motor, stepper motor, solenoid valve and so on. The chip with two enable control
terminals uses the standard logic level to control signals, allows or prohibits the device to work when the input
signal is not interfered, it has a logic power input terminal which can enable the internal logic circuit to work
under low voltage, and feedback the variation to the control circuit. Especially, the input can be connected
directly with the MCU and easily controlled. When the DC motor is driven, the stepper motor can be directly
controlled, and it can be turned forward and reversely, which only needs to change the logic level of the input.
The pin arrangement is shown in Fig.3.2.1. The pin 1 and 15 can separately connect to the current sampling
resistor and form the current sensing signal.
Fig.3.2.1 Arrangement of Chip Pins
L298N can drive 2 motors which are connected between OUTl, OUT2 and OUT3, OUT4. 5, 7, 10 and
12 pin are connected to input control level for controlling the positive and negative rotation of the motor, ENA,
ENB are connected to control enable terminal for controlling the running and shutdown of the motor. Its
characteristics:
◆
Signal indicator
Summary of Contents for Hummer-Bot
Page 1: ...Hummer Bot Instruction Manual Github https github com keywish keywish hummer bot...
Page 7: ...4...
Page 8: ...5...
Page 9: ...6...
Page 10: ...7...
Page 13: ...10 Fig 2 2 Several commonly usedArduino...
Page 15: ...12 After the completion as shown...
Page 16: ...13 The second step is to Welding wire on the motor...
Page 17: ...14 After the completion as shown...
Page 19: ...16 Fig 3 1 3 Diagram of Aluminum Alloy Bracket Installation...
Page 20: ...17 Fig 3 1 4 Diagram of Motor Installation Fig 3 1 5 Fixing Screw for Motor...
Page 24: ...21 Fig 3 1 10 Diagram of Wheel Installation Fig 3 1 10 Diagram of Wheel Screw Fixation...
Page 29: ...26 Fig 3 1 15 Diagram of Tracing Module Installation...
Page 30: ...27 Fig 3 1 16 Diagram of Screw Brackets Fig 3 1 17 The Back of Complete Installation...
Page 32: ...29 First install the screws on the UNO After the completion as shown...
Page 43: ...40 Fig 3 1 33 Diagram of Wires Arrangement Fig3 1 34 the Effect of Whole Assembly...
Page 56: ...53 Fig 3 2 11 Diagram of Data with Obstacles Fig 3 2 12 Diagram of Data without Obstacles...
Page 69: ...66 Fig 3 2 22 Diagram of Steering Gear Fig 3 2 23 Composition of Steering Gear...
Page 93: ...90 Fig 3 2 42 Receiving Head Position Fig 2 3 43 Installation of Receiving Head...
