Recent content by nate.kilmer

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    Inrush Current Limiting Circuit - Would this work?

    This was going to be for small production runs, about 1000 per year, but I'm no longer spending time investigating this. It was originally a small part of a larger circuit, but I've abandoned this and am using an ICL thermistor instead. I came up with this gate-delay MOSFET current limiter when...
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    Inrush Current Limiting Circuit - Would this work?

    I tried this out, and it did seem to fix the issue of the motor teetering between on and off. I'd say there's probably a good solution buried somewhere in that circuit, but sorting out the proper R and C values is a bit tricky. A more experienced engineer could probably make this work well.
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    Inrush Current Limiting Circuit - Would this work?

    Thanks for your input, AND your simulation. I did mention to ignore the component values in my schematic, so please disregard those values. I'm more curious about the general idea of slowly charging a capacitor to bring the gate of the transistor up to its threshold value and controlling the...
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    Inrush Current Limiting Circuit - Would this work?

    Thanks for the input! I built this circuit last week, and got some interesting results. It does indeed limit the inrush of current, but it also leads to weird behavior. I think that when Vgs gets high enough to allow current through the MOSFET, the capacitor discharges slightly, and then there's...
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    Inrush Current Limiting Circuit - Would this work?

    I came up with an idea that I think might manage some inrush current I'm trying to limit, but I'm concerned because I didn't come across this when I was searching for ways to manage inrush current on the internet. It consists of just an N-channel MOSFET, a resistor, and a capacitor. The...
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    Suspicious part suppliers (Worldway Electronics, Utmel Electronic, Robosynatics, etc...), what are they about?

    Thank you, splud. Yeah, I'm not about to start ordering parts from any and all vendors listed on Octopart, but I might start making low-risk purchases and keeping track of which vendors send bad products. It would be nice if a website like Octopart did most of the legwork to vet the vendors on...
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    Suspicious part suppliers (Worldway Electronics, Utmel Electronic, Robosynatics, etc...), what are they about?

    Thanks for that info. I've read elsewhere that some of the secondary distributors do some bait-and-switch tactics, and I think we've all seen articles about counterfeit ICs out there, so it feels risky trying to procure parts from sources I'm unfamiliar with. Anyway, thanks again for that input.
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    Suspicious part suppliers (Worldway Electronics, Utmel Electronic, Robosynatics, etc...), what are they about?

    I'm currently looking for some FLASHPRO4 peripherals, which are naturally hard to find as they are old devices, and the reputable dealers like Digi-Key, Mouser, and Newark all have none in stock. If I go to a site like Octopart, there are multiple sites listed that claim to have thousands in...
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    Where can one find the different types of thermistor curves?

    I found an R-T calculator that provides customizable R-T tables for specific calculations. https://www.qtisensing.com/calculators
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    Christmas Projects Idea

    If you're really feeling ambitious, look up "Matt Parker Christmas Tree" on YouTube.
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    Where can one find the different types of thermistor curves?

    I'm trying to source an alternate thermistor for one that became unavailable, and the old part lists on its datasheet "RT curve Y". I know that the RT curves of thermistors differ based on the material and doping concentrations etc, but I can't seem to find any reference material about these...
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