The transistor acts as a switch that delivers more than 20mA to the buzzer. In this circuit, only around 2mA is drawn from the Arduino pin, while the full current drawn by the buzzer is taken from the Arduino 5V supply through the transistor. It could be used in an alarm circuit or as an audible indicator that a keypad key is pressed.īecause the buzzer draws more current than the maximum current that an Arduino pin can deliver, it is necessary to connect the buzzer to Arduino using a transistor.Īs shown in the circuit diagram below, a transistor such as a PN2222 or KSP2222 can be used so as not to overload the Arduino pin. Basic Testing of the Geekcreit Active Buzzer Module with Arduino Controlling the Active Buzzer Module with ArduinoĪn Arduino can be used to switch the buzzer on and off. No Arduino sketch is necessary as the Arduino 5V is used directly for testing purposes. When the buzzer is connected to 5V it should sound.ĥV from an Arduino can be connected to the buzzer as shown in the image below. The simplest way to test the buzzer to see that it is working is to connect a 5V power supply that can deliver 30mA or more across its pins. For more details, see the Geekcreit active buzzer module pinout. For this reason it will sound when power is connected to it and does not need any external electronics or an Arduino for it to produce a sound.Īs can be seen in the above image, with the buzzer facing forward, the left pin is negative (-) and the right pin is positive (+). The active buzzer has built-in electronics that produces the buzzer sound. Geekcreit Active Buzzer with Sticker Seal (left) and Sticker Removed (Right) Basic Buzzer Operation and Testing The image below shows the active buzzer module used in this tutorial with the sticker seal in place on the left and with the sticker removed on the right. This tutorial shows how to connect the active buzzer to Arduino as well as basic use and testing of the buzzer module.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |