# Measuring Resistance

Resistance is generally measured using a multimeter. ExpEYES provides a limited facility to do this, using the SEN terminal. SEN is actually a voltage measurement terminal, with a 5.1k Ω resistor connected to 3.3V internally. The internal 5.1k Ω and the external resistor connected to SEN forms a series combination. By knowing the voltage across both and the value of one resistance, we can calculate the other using Ohm's law. The drawback of this method is that the accuracy is poor when the external resistance differs widely from 5.1k Ω. A resonable range is from 100 Ω to 100 kΩ.

# Objective

Measure resistance using the SEN terminal.

# Procedure

- Connect the resistor between SEN and any Ground terminal.
- Observe the value shown on the top right side of the GUI.
- Repeat with different resistors