A common problem in designing electric circuits is having to pick a resistance that provides the desired amount of current. In this project, we will create a circuit (i.e. choose a resistor) which results in a specified current being provided by a 5V source.
This exercise uses concepts introduced in our experiment on Ohm's law. A link to this experiment is provided at the right.
For the circuit shown below, choose a value for the resistor R so that the current I out of the source is between 10mA and 15mA. Your choice of resistors is limited to those available in the Digilent® Analog Parts kit.
Construct the circuit above with the resistance value you determined in Step 1. Use your DMM to measure the current I.
Compare the measured current with your expectations from Step 1. The current requirement should be between 10mA and 15mA. Did you meet this current requirement?