Having been in contract manufacturing for the last 17 years, I have seen hundreds of varieties of connectors available from the Molex, Tyco/AMP, JST, Panduit, Samtec, ITT Cannon, Berg, etc, etc. Posted in Engineering, Hackaday Columns, Parts Tagged connector, JST, series, specification, standards Post navigation Help prevent future headaches: be specific about your connectors! Customers need to know the specific connector to interface with your product. Even though internet specifications are generally poor, that’s no excuse to be lazy. This is even more important for component vendors. There’s no need to make somebody else (possibly your future self) go through the process of guessing which connector type you used. It’s better if we understand the context of the project and choose something that fits existing conventions.Īnd when you’ve made your choice, be specific in your project documentation. Usually the connectors used in one-off projects are dictated by those already on components built by others, but sometimes the choice is ours to make. Such knowledge will come in handy when it comes time to choose a connector. The situation is reversed in PC components where Molex designed most of the connectors in that ecosystem. The backyard-friendly hobby aircraft ecosystem (airplane, helicopter, and multi-rotor) uses many connectors designed by JST with Molex as a smaller player. This mystery “JST connector” has the 1 mm pitch of the JST SH, but the datasheet says it is too large to be one.Īs we gain experience with connectors, we’ll make better guesses based on context. The Molex PicoBlade is a 1.25 mm pitch connector frequently confused with JST GH in the same pitch. Surplus inventory are frequently mislabeled and some connectors look too much alike. When faced with this task of digging deeper keep in mind the possibility that it might not be a JST connector at all. If a mystery connector doesn’t match the datasheet for the popular JST connector in that pitch, then unfortunately the search becomes more difficult. The SH series are so small that JST specified optional protrusions to give us something to hold. After the XH series, the pin pitch gets narrower, the wires get thinner, and the connectors are more fragile through PH (2.0 mm), ZH (1.5 mm), GH (1.25 mm), and SH (1.0 mm). Its pitch of 2.5 mm is effectively identical to the 0.1″ pitch commonly found on prototyping breadboards. 3D printer control board with JST XH connection to the stepper motors Then identification becomes a matter of comparing the physical features against datasheets. A quick way to narrow down candidates is to look at their pitch: the distance between pins. When a connector interface two or more wires to a circuit board instead, it might be one of the following series. As hackers, we need some skill at deciphering mystery connectors. We’ll start here with a quick survey of the most popular types from JST.Ī simple two pin wire-to-wire connector is probably the RCY series. We also sometimes choose to ignore “No User Serviceable Parts Inside” and merrily explore guts of equipment to which we have no specifications at all. The reality is: we live in a world full of ambiguous connector specifications. Which JST connector?īattery pack with JST RCY for discharging and JST XH for balance charging. But when it comes to actual hardware specification, that’s not good enough. We can simplify to “JST connector” when chit-chatting about projects. A company whose history goes back to 1957 and their website (styled in 1999) lists hundreds of different types. It is short for Japan Solderless Terminals Manufacturing Company, Ltd. This is the moment we learn “JST” is not a connector specification. Inevitably we find the JST connector from one part fails to fit in the JST connector of another. When reading about cool projects and products, it’s common to see wiring plugs labelled “JST connector.” This looks fine until we start getting hands-on and begin hacking things together.
0 Comments
Leave a Reply. |