That 330Ω slot in your schematic is the one missing piece holding up the whole board. This Jaycar carbon film resistor drops right in. 0.25W keeps it cool under normal load. Plug it in, power up, done
| brand | Jaycar |
| resistance | 330 ohm |
| power_rating | 0.25 watt |
| type | Carbon Film Resistor |
| sku | ER1562 |