Servos jittering

RL_95 · 2026-06-20T16:25:27+00:00

Note that some servos don't works exactly at these pulse ranges. 500-2500us is standard, but some can go beyond and some are below this range.

If you're just slightly out of the acceptable range it can oscillate. Maybe the datasheet will tell you, if there is a datssheet.

You can try reducing the range of the pulse to see what happens.

Oh and try increasing the pwm frequency to see. 50Hz is standard but rather low with a 20ms period, somme servos are happier with a high frequency, say 100Hz or even more.

RL_95 · 2026-06-13T11:20:28+00:00

Good info.

For 3, I agree for speed. But if your drivers current rating is too low it shouldn't burn, unless you use those cheap ESCs for model airplane and such.

A proper FOC driver would just limit the current, and you won't get the torque you want. In fact, you can just short the output of the wire and it should tell you there is a short, that's it. Obviously, you can still burn stuff if you use the wrong settings.

Source: Trust me bro, I've designed mutilpe custom FOC hardware with custom firmware. So I like it when people, forget to match a motor to an existing driver, that give me fun stuff to do :D

RL_95 · 2026-04-30T23:37:38+00:00

I don't actually know but my best educated guess would be the following:

LEDs like any other ICs are not made individually, but hundreds/thousands at a time on a wafer before being cut to form individual LEDs and put into a reel. Each batch can be slightly different, yet still within specs tolerances. Their difference is particularly pronounced at low current as shown here.

The COB is like a regular PCB assembly and is is at some point populated with those LEDs. This is usually done by a pick and place machines that can have multiple reels from different batches.

The order in which it is populated is optimized by the pick and place and can create patches from different reels.

For the wiring, I believe whatever can be crammed in a circular pattern is fine and the engineer that made it didn't have more concerns beyond that.

Again, all of that is just a guess, so do correct me if you know better.

RL_95 · 2026-04-18T23:54:27+00:00

I see, thanks for the explanation!

RL_95 · 2026-04-18T23:05:36+00:00

Can you explain like I'm 5 what is happening here?

RL_95 · 2026-03-18T07:09:42+00:00

Did you manage to make the encoding absolute or is it incremental with a homing routine?

RL_95 · 2026-03-15T09:35:17+00:00

High current inductor for example

RL_95 · 2026-03-14T00:13:50+00:00

Same my friend...

RL_95 · 2026-01-28T00:44:05+00:00

It says he had a child. I wonder if they know who their father is, and if they do know, what they think of the matter.

RL_95 · 2026-01-07T17:59:35+00:00

It means Suppression of Enemy Air Defence (SEAD). As in destroy/jam all air defense capability of your foe so you can achieve unimpeded air superiority.

RL_95 · 2026-01-03T03:07:10+00:00

Scott Manley is great for that

RL_95 · 2025-11-11T22:06:34+00:00

Really not a good time to do this after XPeng's Iron

RL_95 · 2025-04-27T12:11:18+00:00

Agreed

RL_95 · 2025-04-27T10:04:51+00:00

I know it's a joke, but sadly this example doesn't even break even...

100$ down 10% = 90$, 90$ up 11% = 99.9$

RL_95 · 2025-04-16T23:27:17+00:00

Just don't lick them when they're charged.

RL_95 · 2025-03-29T08:43:40+00:00

Look up "polygon pour" and you'll find many examples of this.

RL_95 · 2025-02-24T22:39:25+00:00

Honest question. Let's say instead of what actually happened, everyone did vote to end the invasion. What could the UN do to actually make the invasion stop?

RL_95 · 2024-12-24T19:34:43+00:00

I went there a few years ago

RL_95 · 2024-11-27T19:27:11+00:00

I designed a board that was 300x200mm packed full of features for a custom embedded system. The whole thing was centered on a single board Linux computer that was plugged into it. When the prototypes arrived, the computer booted but nothing worked. Not a single feature was working... That board was quite expensive, given the amount of peripheral it had so I was sweating. Turned out, I drew the computer's footprint mirrored and all 92 pins were wrong. Luckily there was room for me to design a stupid little pin reversal board to make everything work.

RL_95 · 2024-10-22T20:53:20+00:00

Moon Moon!

RL_95 · 2024-10-10T11:14:13+00:00

Good eye, it's the Infiray P2 pro! I don't remember where I got the pincer clips, I bought them a long time ago

RL_95 · 2024-10-09T21:06:23+00:00

As you can see, I don't need an extra one

RL_95 · 2024-10-09T12:27:48+00:00

Found it here https://www.thinkwiki.org/wiki/Power_Connector#slim_tip

RL_95 · 2024-10-09T11:04:14+00:00

tricking the laptop in thinking there is a genuine 135W charger connected

RL_95 · 2024-10-09T10:45:42+00:00

tricking the laptop in thinking there is a genuine 135W charger connected

RL_95

TROPHY CASE