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Calculates output voltage from a resistor network dividing input voltage. Used for ADC inputs, sensor interfaces, and voltage scaling.
Công thức
Formula: Vout = Vin × (R2 ÷ (R1 + R2))
- R2
- R2 value — Variable used in the calculation
- R1
- R1 value — Variable used in the calculation
Hướng dẫn từng bước
- 1Two resistors in series across supply voltage
- 2Output taken between resistors
- 3Formula: Vout = Vin × (R2 ÷ (R1 + R2))
- 4Select resistors to achieve desired output voltage
Ví dụ có lời giải
đầu vào
V1=12V, R1=1k, R2=1k
Kết quả
Vout=6V
Lỗi thường gặp cần tránh
- ✕Not buffering voltage divider with low-impedance load
- ✕Using very small resistor values (excessive power)
Câu hỏi thường gặp
What affects voltage divider accuracy?
Load impedance (must be much higher than resistor values), temperature stability, resistor tolerance.
How do I buffer a voltage divider?
Use op-amp buffer to isolate divider from load; prevents voltage drop under load.
Sẵn sàng để tính toán? Dùng thử Máy tính Voltage Divider miễn phí
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