This project utilises a NE555 IC and a CD4017 IC to create an LED Wheel. When the user presses the start/stop button, the LEDs light up randomly. Pressing the start/stop button again reduces the speed at which the LEDs change, eventually leading to a stop.
| Designator | Value |
|---|---|
| BZ1 | Buzzer |
| C1 | 10nf |
| C2 | 100uf |
| C3 | 100uf |
| C6 | 470uf |
| D1 | LED |
| D2 | LED |
| D3 | LED |
| D4 | LED |
| D5 | LED |
| D6 | LED |
| D7 | LED |
| D8 | LED |
| D9 | LED |
| D10 | LED |
| D11 | D |
| J1 | USB_A |
| Q1 | Q_PNP |
| R1 | 9.5K |
| R2 | 10K |
| R3 | 1K |
| R4 | 1K |
| SW1 | Push |
| Button | |
| U1 | NE555 |
| U2 | CD4017 |