How does load resistance affect voltage divider output?

Load R_L in parallel with R₂ reduces effective R₂. V_out = V_in·(R₂||R_L)/(R₁+R₂||R_L). Significant loading when R_L < 10×R₂. For stiff divider: keep R₁, R₂ much less than R_L.

What is the Thevenin equivalent of a voltage divider?

V_th = V_in·R₂/(R₁+R₂), R_th = R₁||R₂. Load sees V_th as source with internal resistance R_th. Thevenin equivalent simplifies analysis of divider with various loads.

How accurate is a voltage divider for DC bias?

Resistor dividers have ±1-5% tolerance. For precision: use precision resistors (0.1%) or op-amp buffer. Temperature coefficient of resistors causes drift. 1kΩ (100ppm/°C): 50mV drift over 50°C range from 5V supply.

Voltage Divider Calculator

Calculate output voltage: V_out = V_in·R₂/(R₁+R₂). Design resistor values for target output voltage. Loaded voltage divider with load resistance. Thevenin equivalent of voltage divider.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate output voltage: V_out = V_in·R₂/(R₁+R₂). Design resistor values for target output voltage. Loaded voltage divider with load resistance. Thevenin equivalent of voltage divider. Use the voltage divider result to inform your clinical assessment.

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Frequently Asked Questions

How does load resistance affect voltage divider output?

What is the Thevenin equivalent of a voltage divider?

How accurate is a voltage divider for DC bias?