Arduino Transistor Relay Circuit

Die basis vom transistor wird durch eine sehr kleine spannung eingeschalten.

Arduino transistor relay circuit.

The circuit shown below uses an led as the output device. The 12v adaptor is used for powering the circuit. We have connected transistor base to arduino pin a0 through a 1k resistor. Wenn du keine spannung anlegst kann es sein dass der zustand am transistor nicht klar ist d h.

And one simple npn transistor. With a relay you can easily use an arduino to control the power of nearly any type of electrical device. Working and concept of relay. The switching contacts of a relay are completely isolated from the coil and hence from the arduino.

In relay circuits i normally use a 10k resistor as the transistor base resistor for all relays whose coil resistance is between 200 ohm and 400 ohms. If the transistor base terminal is 0 low then fan turns off for delay and other you can set with help of arduino ide and arduino uno. This circuit is just for a demonstration purpose. Also high einschalten low abschalten.

Now what you have to do is to add npn transistor and connect the collector of npn to ground and then connect the ground terminal to the ground 5volt dc supply now connect the one leg of block terminal with common and another leg with no of really that s it and yes connect your base of npn transistor with your arduino and use your relay switch copy this systematic as per your requirement. The basic transistor switching with arduino for arduino digital 7th pin is output if the arduino send logic 1 high the mini cooling fan turns on. When you give high signal on input it connects the led to gnd. Transistor as switch with arduino example.

If you calculate the transistor base resistor for a 400 ohm relay load you will find it to be 56k but i use 10k which does not make any difference expect a some ma more dissipation or wastage by. 1 2 switching by npn transistor. Relays are often used in home automation projects. Ein low signal aus deinem arduino behebt das problem.

In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor. This diagram shows the interfacing of an arduino with an npn transistor and a motor. Make the following circuit. An ac bulb is used for demonstration.

Dass rauschen oder störungen den tansistor eingeschalten lassen. Motor control by relay on arduino. We can only operate a 5 volt dc motor through this example. Because we provide power to a load through arduino supply.

If you need to drive a large power motor you. Relays are electromechanical devices used to control power for the attached devices. Here we are taking high input by push button switch.