this post was submitted on 09 Feb 2025
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Can't really tell what's going on from just this image. Is there only one lead coming off of the device? Is it just sticking out of the braid, or is it fully-uncovered?
My initial guess would be it's a high-frequency filter capacitor.
Not sure if this image helps enough...
It was originally hidden in the sleeve under the heatshrink, it might be better to diy some cables instead of messing with these. Having that capacitor visible isn't going to improve the visuals of my build.
My limited knowledge of electronics makes me think that's some kind of signal filter. I've seen similar setups on headphones (usually coupled with a resistor) to filter or reduce certain frequencies.
What exactly it's doing in your setup, I can't say.
It's either a signal filter or more likely a power stabilizer to handle fast load spikes when the device suddenly changes power usage levels.
I've learned the hard way that every ttl chip gets it's own cap between vcc and ground.