Works H- bridge motor drives and production

Step 1: Required hardware In order to be able to design such a motor driver, there are many different options, so I use the following method components: X4 BD135 or BD137 or BD139 BJT NPN transistor (any NPN transistor can be used in most times) X1 7805 Regulator X4 diode ( X1 74HC08 Quad NAND Gate logic (you don't have to use it, you can also use transistors to make our own NAND door) " X1 74LS14P non-door (any 2 non-door (inverter) can be) X1 100NF capacitor X1 0.33UF capacitor After X1 0.1 is completed, a UF capacitor is also required X1 DC electric motor (12V) X4 connection to the PCB terminal Welding line, etc. Step 2: Circuit Schematic and Working Principles Well, we actually have a simple schematic. She will be able to drive the motor with three input pins (IN1, IN2, ENABLE). In this schematic, regardless of the other inputs, the Enable pin is used to enable our drive, if enable = logic Low (0V), due to the AND gate, the circuit will not drive the motor. This is why any low input of "and" will give us low output. Note: By setting the PWM to "Enable", we will be able to control the speed of the motor. And show the door truth table in the photo! Let us see if enable = 0 and IN1 = 1 (5V), and then the gate output is = 1, the second LBE = 0 and Q4 (in the schematic) transistor will be in the ON state, Q3 will be in the ON state. Similarly, IN = 0, that is, U1: C and the output of Gate is logic 0. U1: D is corresponding to 1, so the Q1 transistor will be at an off state, and the Q2 transistor will be in a state of on. Based on these logic, the motor will drive by two transistors in an on state. To travel in other directions, the opposite logic can be applied to the input. Note: If any input (IN1 and IN2) applied the same logic at the same time, for example (IN1 = 0, IN2 = 0 or IN1 = 1, IN2 = 1 does not drive the motor, so this is a Brakins situation). Step 3: Test PWM code (using Arduino) Here we have a very short code to test the circuit with speed control mode. To this end, we must generate a PWM. I have already generated PWM using Arduino. The code and Arduino test schematic are shown below. Please note: You must connect Arduino GND to the PCB GND. Step 4: PCB order After testing in the simulation, we can draw a PCB schematic using any of the programs you want. Here, I have my own design and gerber file. After getting the gerber file, you can upload it to PCBWAY and order it. PCB Company Link (PCBWAY): Click here! Note: This PCB design is not unique. It is half of L298N. However, due to the components we use, it cannot provide the same amount of current as L298N. Step 5: Welding components After obtaining the PCB, we can weld relevant tips: one-to-one places the components on the PCB, flip and weld one by one. The weld portion is shown in the video. You just need to look at it. Editor in charge: WV, read full text