The xylophone has eight notes, which are sounded by placing a finger onto the PCB, allowing a simple tune to be played. The conversion of key presses into the frequency of the note is done by a PIC micro-controller, pre-programmed with software for this application.
The student can mount the PCB, battery pack and speaker into a box they have designed to make a children's toy.
This kit contains:
- 1 x PP3 clip lead
- 1 x 3AA battery holder
- 1 x LM324 op-amp IC
- 1 x 14 pin IC holder
- 1 x PIC 12F675 pre-programmed with xylophone code
- 1 x 8 pin IC holder
- 1 x 3.3Kohm resistor
- 8 x 4.7Mohm resistors
- 1 x BC337 NPN transistor
- 1 x 50mm 8ohm speaker
- 0.5m connecting wire
- 1 x xylophone PCB
PCB dimensions: 93mm x 37.5mm.
Requires x3 AA batteries, available separately.
Click here to download build instructions 
Note: Schools will receive a more detailed set of teaching notes on a CDROM.
