Latest / Hardware Startups with Fexingo: Devices, Robotics, and Manufacturing Tech Companies / How Hardware Startups Use Connector Standardization to Cut Costs
Transcript
- Lucas: So there's this moment in hardware development that I think doesn't get enough attention. You're deep in the prototyping phase, you've got a board that works, the firmware's talking to the sensors, and someone says, 'What connector are we using for charging?' And the answer is usually, 'Whatever we had in the lab.' Luna: Yeah, I've seen that. It's like the connector is an afterthought until suddenly it's the thing holding up your production ramp. Lucas: Exactly. And that's why I wanted to dig into connector standardization today. Because the choice of connector might seem like a tiny detail, but it can have outsized effects on your cost, your assembly time, even your repair rates in the field. Luna: So what's the concrete example? You mentioned a medical device company earlier. Lucas: Right. So there's a startup I've been following — they make a wearable cardiac monitor, about the size of a matchbox. In their first production run, they had fourteen different connectors across the device and its accessories. Fourteen. That included a custom pogo-pin charger, a micro usb debug port, a couple of different JST headers for internal wiring, and even a proprietary cable for their base station. Luna: Fourteen connectors for one product? That seems like a lot. Lucas: It is. And each one added its own cost. They were carrying extra inventory, managing multiple suppliers, and their assembly line had to switch tools constantly. It wasn't until they hit their second revision that they did a connector consolidation. They cut it down to three connector types. Luna: That's a big drop. What did they choose? Lucas: usb c for all external data and power, a single Molex Pico-Lock for the internal battery connection, and one standard header for programming. That's it. They eliminated the custom pogo-pin charger entirely — usb c handles charging now. And they moved the debug port to a test pad on the board. Luna: And what was the impact? Did they actually save money? Lucas: They did. Their bill of materials per unit dropped by about four dollars, which doesn't sound like much until you multiply it by fifty thousand units. But the bigger win was in assembly. Their cycle time for final assembly dropped by nearly twenty percent, because operators weren't fumbling with six different cable types. Luna: Twenty percent cycle time reduction just from connectors? That's huge for a small team. Lucas: It is. And it freed up floor space and reduced the training burden for new assemblers. But here's the thing that surprised me — the biggest benefit wasn't in manufacturing at all. It was in field service. Luna: Oh, interesting. How so? Lucas: When a device came back for repair, technicians used to have to identify which cable went with which unit. With fourteen connectors, that was a real headache. Now, everything uses usb c. So they can plug in any device and diagnose it without hunting for the right cable. Luna: That's a really practical benefit. And it probably also simplified their supply chain for spares. Lucas: Exactly. They went from stocking multiple cable types to just one standard cable. That cut their inventory carrying costs and reduced the risk of an obsolete connector leaving them with a pile of useless cables. Luna: So, given all these benefits, why don't more hardware startups standardize from day one? What's the resistance? Lucas: A lot of it comes down to engineering culture. Design engineers love to optimize for the specific use case. A custom connector might be smaller, or have a lower mating cycle, or maybe it's just what they used in their last project. But that optimization often ignores the system-level costs. Luna: So they're optimizing locally, not globally. Lucas: Right. And there's also this fear that a standard connector might not be rugged enough, or might not handle the current draw. But in reality, usb c can carry up to five amps at twenty volts, which is more than enough for most wearable devices. And for internal connections, a Molex Pico-Lock is rated for five hundred mating cycles — that's way beyond the life of a typical consumer device. Luna: Yeah, that's more than enough. And you can always test for the specific requirements, as we've talked about with accelerated life testing. Lucas: Exactly. And that's where the conversation gets interesting. It's not about never using custom connectors — sometimes they're absolutely necessary. But you should justify it with data, not just convenience. Luna: So what's the process for making that decision? How does a startup evaluate whether to standardize or go custom? Lucas: I'd say start by listing every connector in your current design and asking three questions for each one. First, what is it actually doing? Second, could a standard connector do the same job? And third, what would the trade-offs be in size, cost, and durability? If the custom connector doesn't clearly win on all three, you should probably switch. Luna: That's a simple framework. Do you have a rule of thumb for when custom actually makes sense? Lucas: Yes. If your device is smaller than a coin and you need a very specific form factor, or if you're dealing with high-frequency signals above a few gigahertz, or if the connector is exposed to extreme environments like deep sea or space, then custom might be justified. But for ninety percent of hardware startups, standard connectors are the right call. Luna: That's reassuring. So for most people, the answer is just to simplify. Lucas: Yeah. And the earlier you do it, the easier it is. If you standardize during the prototyping phase, you avoid the pain of a late redesign. And you also make your product easier for customers to use, which can be a differentiator. Luna: That's a good point. There's something to be said for the user experience of not needing a drawer full of proprietary cables. Lucas: Absolutely. And that's something we hear a lot from listeners who are building their own hardware. If these conversations help you think through your own product decisions, that's great. And if you've gotten value from the show, I'll just mention that a couple of dollars a month is genuinely what keeps these going — buy me a coffee dot com slash fexingo, if you've gotten something out of them. Luna: Yeah, it really does make a difference, even if it seems small. And every bit helps us keep making episodes like this one. Lucas: So, back to connectors. There's another angle I want to bring up: the impact on testing. When you have multiple connectors, you need different test fixtures and cables for each one. That's more setup time and more potential for error on the production line. Luna: Oh, right. And we've talked about functional test fixtures before — having one standard connector makes those fixtures simpler and cheaper to build. Lucas: Exactly. So the savings compound across the entire manufacturing process. And it also makes it easier to automate testing, because you can use the same interface for every unit. Luna: So standardization pays off in more ways than you initially think. What about the supply chain side? Are there risks to relying on a single standard connector? Lucas: There can be. If you standardize on a connector that's in huge demand, like usb c, you're at the mercy of the same supply chain as everyone else. But the flip side is that these connectors are so widely used that there are multiple suppliers, and you can switch if one has a shortage. Luna: That's a good point. A standard connector might have more competition, which actually gives you more resilience. Lucas: Right. And with a custom connector, you're locked into one supplier, and if they have a fire or a labor dispute, you're stuck. Standardization gives you optionality. Luna: So, what's the one takeaway you want listeners to remember from this episode? Lucas: I think it's this: when you're designing your next product, take a hard look at every connector on the board. Ask yourself if it's earning its place. If it's not, replace it with a standard part. Your future self — and your manufacturing team — will thank you. Luna: And your customers, who won't have to hunt for that proprietary cable. Lucas: Ha, exactly. So next time you're in the lab, resist the urge to grab that random connector from the drawer. Think about the full product lifecycle. That's the smart play.