WHadda WSG104 / Velleman MLP104
Bagpipes is an audio oscillator kit similar to the MLP110 MadLab Electronic Kit - Wonky Wire. The Bagpipes kit is, however, capable of producing eight different tones from about 5kHz (5000 cycles per second) down to about 300Hz. To use the Bagpipes, the stylus wire is moved up and down the network of resistors R1 to R8 which make up the keyboard. The voltage at the end of the stylus changes as each keyboard resistor is touched in turn.