## How much voltage does an H-bridge need?

The device operates from a single power supply and supports a wide input supply range from 4.5 V to 38 V.

### How much current can you expect to draw from the H-bridge 5 volt regulator circuit?

From Vs pin the H-Bridge gets its power for driving the motors which can be 5 to 35V. Vss is used for driving the logic circuitry which can be 5 to 7V. And they both sink to a common ground named ‘GND’. The module has an on-board 78M05 5V regulator from STMicroelectronics.

#### Why we use H-bridge?

The H-bridge arrangement is generally used to reverse the polarity/direction of the motor, but can also be used to ‘brake’ the motor, where the motor comes to a sudden stop, as the motor’s terminals are shorted, or to let the motor ‘free run’ to a stop, as the motor is effectively disconnected from the circuit.

How many volts can a transistor take?

The diode only needs 0.6V to turn on, more voltage than that means more current. Some transistors may only be rated for a maximum of 10-100mA of current to flow through them.

How much voltage does a transistor use?

Generally speaking, this value is between . 6 to . 7 volts for a general-purpose transistor.

## What is the function of the H bridge in a motor?

H-Bridge is a method used to control the activation and output rotational direction of a motor. The H-Bridge uses the four transistors to control the directional flow of current through the motor. Two of the transistors are used to close circuits from a 5V power source to the motor

### Can NPN Darlington transistors be used with diodes?

My examples that follow will use NPN Darlington transistors such as the TIP120 with built in diodes and we work on the assumption the circuit will be controlled by a standard 5-volt micro-controller such as Arduino or PIC.

#### What is the use of 4n25 transistor in microcontroller?

The 4N25 provide voltage isolation between the micro-controller and 12-volt motor power supply. Here we have redrawn the circuit using all the same NPN power transistors with opto-couplers for Q1 and Q2.

What is the function of Q1 and Q2 in PNP transistor?

Here in fig. 2 we have replaced the PNP transistors Q1 and Q2 in Fig. 1 (one of these circuits for each transistor) with a power NPN transistor Q3 and two driver transistors Q1 and Q2. Q1 acts as a switch to supply base current (Ib) to Q3 switching it on.