전압 측정 모듈 -볼티미터
(Voltmeter click)
개요
- 본 제품은 외부 전자 회로의 전압을 측정할 수 있는 전압측정 모듈입니다.
- direct current 만을 측정할 수 있게 디자인 되었으며, 0-24V 범위(음/양)의 전압 측정 범위를 가지고 있습니다.
- SPI인터페이스를 가지고 있으며, 3.3V 및 5V로 동작합니다.
특징
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Product Type Measurements Applications Measuring DC Voltage from external circuit On-board modules MCP3201 12-bit ADC, MCP609 CMOS, MAXX6106 Key Features Measurement range: 0-24Vdc, 12-bit ADC Key Benefits Measures both positive and negative charges, Possible to measure analog values directly Interface SPI Power Supply 3.3V or 5V Compatibility mikroBUS Click board size M (42.9 x 25.4 mm)
문서
- Voltmeter click Examples
- Voltmeter click Schematic
- The design of the board is based on an OpAmp set up as a differential amplifier with a buffered input.
Two onboard screw terminals (probe+ and probe-) are bringing in the current, which then flows through a row of four resistors. A voltage – proportional to the input charge – is generated across the last two resistors. From there it is sent to the differential amplifier that further intensifies the difference between the two inputs (+/-).
The resulting charge is exactly 33 times lower than the actual measured voltage. It is converted by an onboard 12-bit ADC before being outputted through the mikroBUS™ SPI interface (the firmware in the target board MCU should be set up to multiply the ADC value to get the actual voltage). It is also possible to output the analog value directly through the mikroBUS™ AN pin (useful if the target MCU has a higher resolution ADC).
The board can work with either a 3.3V or a 5V power supply
연관제품
- 연관제품 1