It's a really cool pcb which has a built in piano made fron sketch with the help of osciallations between RC circuit as each R has different value it generate different frequency which is then sent to 2 buzzers on each side. It uses NPN transistors to maintain all logic. It conneects electronics to music!!
it has 8 push buttons each of which represents a note and is linked to a different RC circuit
it uses a 3.7 battery
Its portable as it has a 3.7V battery attached to it
Each oscillator is a combination of a resistor and capacitor different resistor values = different frequencies = different notes
the signals from each of the RC circuit are amplified via transistors and sent to two buzzers
https://youtu.be/0eeJvan5Zfs?si=sp8RLpvLW_rBKQvW
document_6102760546040290230.mp4
| Item | Price (INR) | Price (USD) | Link |
|---|---|---|---|
| PCB | 1089 | 12.66 | Lion Circuit (−$2 if ordered with another project) |
| Transistor (BC547) | 27 | 0.31 | Robocraze |
| Push Button (Long) | 69 | 0.80 | Robocraze |
| Battery Holder | 18 | 0.21 | Robocraze |
| 3.7V 18650 Battery | 64 | 0.74 | Robocraze |
| Capacitor (220µF 25V) | 45 | 0.52 | Robocraze |
| Resistors | 0 | 0.00 | Already available |
| Shipping | 359 | 4.17 | |
| Total | 1671 | 19.43 |