4-Channel 24V Relay Module Board with Optocoupler Isolation, Supports High/Low Level Triggers for Arduino Projects - Reliable Expansion Shield
| Country | USA |
| Brand | Harvard Business Review Press |
| Manufacturer | Harvard Business Review Press |
| Binding | Hardcover |
| UnitCount | 1 |
| EANs | 9780875844480 |
| ReleaseDate | 0000-00-00 |