CMSIII Bed of Nails

Bed of Nails

We had spent two lessons to build up this device. The function of this device is to create the sounds through these 8 nails.

Materials list of "Bed of Nails"

1. 1 wooden board
2. 8 nails
3. 4 10k Ohm resistors
4. 1 18k Ohm resistor
5. 1 1M Ohm resistor
6. 1 battery clip
7. 8 Wines
8. 1 Audio Jack
9. 1 0.22 uf capacitor
10. 1 47 uf capacitor

Doing "Bed of Nails" is really fun. But, the process of making this device is quite complicated and difficult. It is because we need to connect each point clearly and to make sure that there is no any misunderstandings of looking at this electric circuit.

For the lecturers' mention, we can design two ways of this device. Option one is setting the nails on two sides only. Another option is setting the nails on all sides. I choose the two sides nails version of my design. I think it will be easily to create the sounds by our hands. The most difficult part during making this device is to confirm all the connection of the solder wire and the chip are separate clearly. If not, the circuit will be not succeed. Thus, using the solder is the most important and difficult part  of this device.

Finally, I succeeded to finish "Bed of Nails". I can use the sound mixer to test my device is success or not. These 8 nails had create different electric sounds through the sound mixer. It is really interesting to create my own electric song.