A daughterboard (sometimes known as a daughtercard, piggyback board, or a mezzanine card) is a circuit board or an expansion that extends the circuits of another board by plugging directly into it. The other board attached is generally the "motherboard" or the computers main board. However, sometimes It may be attached to another circuit board or card that is already inside of the computer. Most often these cards are "sound cards". Therefore providing more means of communication and capabilities. Daughterboards have a variety of sockets,plugs, connectors, pins, and other extensions or attachments for other circuit boards, which are the things that differ from your standard expansion board. Some often known as a PCI or ISA. Today, daughterboards are generally not found in desktop computers as they have been replaced with PCI's and ICA's, but are still found in some laptops.
1. Daughterboards have faster internal connections within the inside of the computer rather than an ordinary external one, They also have the feature to connect with the motherboard directly rather than the slow moving computer bus.
2. Daughterboards are also helpful when needing an expansion card to fit upright on its side. This gives it a slimmer size and allows it to lie parallel to the motherboard. When a device needs to expand its basic or general functions and capabilities without redesigning it completely daughterboards can be used to achieve this. This can be achieved by adding the daughterboard to a special connector on top of the motherboard, therefore allowing new features to be added as a new or separate model. In these cases daughterboards can also go by mezzanine cards as mentioned above which derives from their ability to stack in layers like the sections in a stadium or a theater.
Different types of daughterboards:
- Robotic daughterboard
- Serial ATA connector daughterboard
- Access control list daughterboard
- Communication daughterboard (CDC)
- Server management daughterboard (SMDC)
- Modern daughterboard
- Bluetooth daughterboard
- CPU socket daughterboard
- AD/DA/DIO daughter-card
- 10/100Base-T Ethernet daughterboard
- RAID daughterboard
- ADD daughterboard
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