Square Wave 생성 모듈 -제로 크로스 검출
(ZERO-CROSS CLICK)
개요
- 본 제품은 Square Wave 생성 모듈 -제로 크로스 검출 입니다.
- 웨이브폼이 양에서 음으로, 음에서 양으로의 변화를 검출할 수 있는 제품입니다.
- 웨이브폼이 그라운드 포텐셜을 지나갈때 출력값이 HIGH 에서 LOW로 쉬프트 되고 LOW에서 HIGH로 쉬프트 됩니다.
- 웨이브폼은 주파수에 따르지만, 출력은 square wave 이기 때문에 본 제품과 같은 회로를 square wave generator 회로라고 합니다.
특징
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HOW DOES IT WORK?
Zero-Cross Click is based on the circuitry that provides Zero Crossing Detection (ZCD). The alternate current can be connected over two block terminals. As it is intended for this Click board™ to work with high voltages, the critical components are placed on the bottom side, but still, take all precautions when working with this Click board™. On the top side is an AC ON LED for visual presentation of the AC presence. All the magic is happening in the circuitry at the bottom side of this Click board™.
The current passes through the Graetz bridge circuitry, consisting of four DLGL5980. The alternate current converts to a direct current, which is necessary for driving an LED in an EL357N-G, a phototransistor photocoupler from Everlight. When activated, the optocoupler sends a LOW logic state to a ZC pin, which is the pin with which the Zero-Cross Click communicates with the host MCU.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Optocoupler Applications Can be used for the development of frequency counters, phase meters, time-maker generators, and more On-board modules The circuitry that provides Zero Crossing Detection (ZCD) Key Features Square wave generator circuit, alternate current presence, zero crossing detection from positive to negative, and from negative to positive, block terminals for connecting high voltages, and more Interface GPIO ClickID Yes Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V,External
