![]() ![]() Tutorial: How to make a footprint in KiCad 5.1.x?.How can i assign a footprint to a symbol?.What is the difference between footprints and symbols?.They are organized by connector standard if there is one ( Connector_USB, Connector_Pin_Header_*, …) or, if there is no standard, then by manufacturer ( Connector_Molex, Connector_JST, …)įinally, be aware, that although there are a huge number of footprints shipped with KiCad, one exactly fitting requirements may not be present, so be prepared to make your own. KiCad comes with a number of footprints for a wide variety of connectors. For assigning a footprint, use one of the “assign footprint tools” (tools -> assign footprint, the properties dialog of the symbol, …) These generic connectors do not come with footprints preassigned, as each one represents a huge number of possible connectors. (for example Conn_01x01 for a single pin connector like a faston connector) For terminal blocks and some other specialized connectors (usb, dsub,… ) there are more specialized symbols to make it clearer for the reader of your schematic which connector is used.Ī few examples are shown in this screenshot Select one with the correct number of pins and the correct pin numbering scheme fitting your selected part. All of them are found in the Connector_* libraries. KiCad is shipped with a number of generic symbols for connectors for this reason. On the schematic (symbol) side select any suitable connector symbol (for more details see Off-Board Components in KiCad 5). Check datasheets and footprints of connectors for schemes used then select symbols accordingly. One pitfall for multi row connectors is the different numbering schemes used. (Organized by manufacturer on the footprint side and by feature set on the symbol side.) KiCad comes with a number of footprints and symbols, for this type, in a number of Connector libraries. A huge variety of such connectors exists, some types being internationally standardized. The same mechanical unit connects multiple wires. This is a very popular consideration for connectors. The Conn_01x01 symbol should fit well with this application. The KiCad library does not yet have footprints for such connectors. The most common type are blade style (faston) connectors. Some are listed in (electrical) (section Single-wire crimp terminals) There are a number of solutions for connecting single wires. Available space (Do not forget about the cable itself.).Strength of the locking mechanism (Sub question: should connecting be possible without tools?).keying (to ensure correct polarity or protect against mating with the wrong cable).Availability of both the connector components and tools (most connectors require crimp tools on the cable side).It is out of the scope of this article to give detailed guide about connector selection, however, the below list of a few simple questions may help with selections: ![]() ConnectorsĪ connector is a two part system where one component is soldered to the PCB and the other is connected to a wire or cable. ![]() It is suggested to use the Screw_Terminal symbols found in the Connector library. At the time of writing these are mostly screw terminal blocks. The KiCad library comes with a number of TerminalBlock_ libraries that hold footprints for terminal blocks. Be aware that cheap knockoffs may not be well specified and should be handled with extra care. When buying a terminal block select one that is rated for the current you expect on this connection. ![]() Be sure to follow manufacturers’ suggestions, otherwise the connection may not behave as specified. Other terminal blocks, typically spring loaded, for use without wire end termination are also available. The cheapest option is screw terminal blocks which require a crimped end terminal (or wire ferrule). (Most likely the Conn_01x01 symbol) Terminal blockĪ terminal block is a component that is soldered to your PCB and has some mechanism for wire connection. The standard connector symbols might be a good option. There is no special symbol for these in the library. Since the library in version 5.1.6 NPTHs for strain-relief have been included. Be sure to select the footprint to fit the wire diameter. The KiCad library comes with solder wire footprints both in THT and SMD. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |