Components

1 Smowboard Think Mini
1 Speaker
1 10k ohm resistor
1 100k ohm resistor
1 BC547 transistor
1 LDR sensor
2 10uF capacitors
4 male-to-female jumper wires
2 male-to-male jumper wires

In this circuit, we connect a transistor on the breadboard. We connect the 100k ohm resistor across the base-collector junction of the transistor. We connect the negative terminal of the capacitor to the base of the transistor and the positive terminal of the capacitor to the pin number 21 of Smowboard. We connect one terminal of the speaker to Vin pin of the Smowboard while its other terminal is connected to the collector of transistor. The emiiter of the transisitor is grounded by connecting it to the ground of Smowboard. We connect an LDR on the breadboard. We connect the positive terminal of the capacitor and one terminal of the 10k ohm resistor to one pin of the LDR. We connect this pin of the LDR to the pin number 13 of Smowboard. The other teminal of the capacitor as well as the resistor is connected to the ground of the Smowboard. We connect the other pin of the LDR to the Vin pin of the Smowboard.

The speaker is connected to the Smowboard using capacitor and transistor. The Smowboard controls the frequency of the sound. When the hand is moved over the LDR sensor, the resistane values varies due to change of intensity. Smowboard reads different values of LDR and accordingly maps it to a specific frequency of sound. Thus, when a hand is moved over the LDR, different frequencies of sound are obtained due to variation in intensity.

Orchestra