After gaining confidence in the operation of the Arduino, we experimented with using it to drive a resistor-transistor-LED circuit. In order to build this, we looked back to the circuit diagrams from Lab 1.
In the Lab 1 circuit diagrams, we had a button/switch, an LM555 timer, capacitors, resistors, a transistor, a speaker/LED, and a 5V power supply. This time, we took away the LM555 timer and replaced the 5V power supply with the Arduino microprocessor. We recalculated our optimal resistors with different values, and added a potentiometer to the circuit. See below for diagram:
We designed the circuit to work successfully with the LED, keeping in mind that the light blinking frequency depended on the resistance from potentiometer. This success was a booster to the next step -- an electronic musical instrument.
In the Lab 1 circuit diagrams, we had a button/switch, an LM555 timer, capacitors, resistors, a transistor, a speaker/LED, and a 5V power supply. This time, we took away the LM555 timer and replaced the 5V power supply with the Arduino microprocessor. We recalculated our optimal resistors with different values, and added a potentiometer to the circuit. See below for diagram:
We designed the circuit to work successfully with the LED, keeping in mind that the light blinking frequency depended on the resistance from potentiometer. This success was a booster to the next step -- an electronic musical instrument.
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