Today we did some exciting activities. We began the day by using potentiometer to control the brightness of LEDs. We investigated charge/discharge times of capacitors in resistor-capacitor circuits by using the Rctime command in PBasic. This allowed us to measure analog changes in resistive sensors. We also worked with a transistor (BJT) to control current in a circuit. Finally, we created circuitry containing multiple ICs, including a digital potentiometer and a BJT.