2x Active Buzzer Alarm Module Sensor Beep For Arduino Smart Car New

US $1.88

Yancheng , ???, China
Jun 9th

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Active Buzzer Alarm Module Sensor Beep for arduino smart car NEW There are many people active and passive buzzer buzzer concept is not very clear, here to do a brief introduction, we want to be helpful for future use. Note that the "source" does not mean power. But rather refers to the shock source. Passive buzzer is characterized by: A passive internal sources without shocks, so if the DC signal can not make it with a tweet. Must 2K ~ 5K square wave to drive it 2 sound frequency controllable, you can make a "more than a meter hair Suola Xi" effect. 3 In some special cases, you can reuse a control and LED mouth Active buzzer is characterized by: An active internal buzzer with shock source, so long as a power will be called 2 program easy to control, SCM can allow a high and low sounds, while passive buzzer can not. One module description A module using 9012 transistor drive 2 Operating voltage 3.3V-5V 6 with fixed bolt hole for easy installation 7 small plates PCB size: 3.3cm * 1.3cm Two module interface specification (3-wire) 1 VCC external 3.3V-5V voltage (5v microcontroller and can be directly connected to 3.3v MCU) External GND 2 GND 3 I / O external microcontroller IO port Package Included: 2PCS*An active buzzer module shown in a (test) 6PCS*20cm DuPont line Shipping Policy Delivery Time We ship to worldwide, it usually takes 10-30 Business Days to delivery. Shipping address We ship to your PayPal address. Please, make sure to provide us with correct, precise, and detailed shipping Address. Send Time Items will be shipped within 1 to 3 business days upon payment received or cleared. Note If you don't receive items over 30 business days, please notify us via eBay message. Return Policy We appreciate your business and offer an instant 7 days return policy.(7 days after receive the item). The returned item has to be in its original condition. We are able to refund your money without shipping cost. Contact us For anything about product, price, shipping or order status, please contact us via eBay message. We love positive feedback and 5 scores DSR. We will leave it for everyone that leaves it for us.