In electronics circuits, the use of an H-bridge is common. Almost every other circuit employed H-bridge for many applications. Generally, the H-bridge is an electronic circuit where voltage can be applied over the heap, in a dual direction. However, the H-bridge circuit is typically applicable in advanced mechanics, robotics, power performance circuits, and many others.
However, this circuit is mainly used for the operation of DC motors. Although, an average DC Voltage can be applied in either bearing to pivot the DC motor forward or in the reverse direction. Subsequently, the DC motor further moves the robot or any motor-powered system forward or in the reverse order.
This H-bridge fabricated here can be made by utilizing two 555 timer ICs. The 555 timer IC is an extraordinary segment in electronic hardware; it very well may be used as a current source and can likewise be utilized as a current Sink. Moreover, the 555 timer IC can again drive current up to 200mA, which is adequate to move a little DC engine.
Hardware Component
The following components are required to make H-bridge Motor Driver Circuit
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | IC | NE555 timer | 2 |
| 2. | Potentiometer | 10k to 100k | 1 |
| 3. | DC motor | 5V | 1 |
| 4. | Battery | 5 – 12V | 1 |
555 IC Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of 555 Timer
H-bridge Motor Driver Circuit
Working Explanation
Associate the circuit as indicated by the above schematic diagram for the H-bridge motor driver circuit. At the point when we move the 10k pot one way, the DC engine pivots in one direction, and when we move the Pot to inverse heading, then the DC motor likewise turns inversely.
Whereas, when we move the Pot one way the voltage at Trigger PIN 2 goes underneath the Vcc/3, which is the non-inverting input of the Lower comparator inside 555 IC. Henceforth, this sets the OUTPUT of the flip-flop, and 555 carries on as the current source and the other 555 acts as the current sink. Thus, the DC engine turns over pivoting in one direction.
At the point when we move the Pot inversely, the voltage at Threshold PIN 6 goes over the 2/3Vcc, which is the non-inverting input of the Upper comparator inside the 555 IC. Wherefore, this resets the yield of the Flip-flop, and 555 carries on as the Current sink, and simultaneously another 555 goes about as Current source, which pivots the DC engine inversely.
Applications and Uses
An H-bridge utilizes several electronics applications, yet this specific circuit is used to drive a DC motor in a dual direction. The circuit is likewise employed in Robotics.
