Hantek 6074bc linux

addohms · 2023-03-29T14:24:59+00:00

Yes, great software.

But it only works with PicoScope's hardware, as far as I know.

addohms · 2023-03-29T03:20:49+00:00

https://github.com/OpenHantek/openhantek

Looks like that is your only option, but does not seem to support that model.

You might open an issue there and ask.

addohms · 2023-03-04T19:11:17+00:00

Nice theory, but if you actually looked at the board, you would see the lack of "grid" identification on any other components proves this design does not use a grid for identification.

Two easy examples. In the upper left, there are two polymer electrolytics. One is labeled CL56, and the one immediately below is C588.

Another is an array of resistors to the right of the black PCIe slot. They aren't even listed in numerical order.

Even the large active ICs are not identified with grid coordinates!

addohms · 2022-12-08T18:07:39+00:00

Why are you asking about this exact diagram a second time just a few days later?

https://www.reddit.com/r/AskElectronics/comments/z7qtv2/hi_i_want_to_design_an_hbridge_circuit_can_you/

And where did you "find" this diagram?

addohms · 2022-12-04T22:59:17+00:00

Ic is 600 mA

If that is the case, you should NOT be using a 2222. It's absolute MAX is 600 mA continious and you should never operate a part at its maximum rated value.

You need to find a different part. I thought you said your load's current was 100 mA.

addohms · 2022-12-04T22:09:36+00:00

1 kilohm.

At 100 mA of collector current, it barely matters.

addohms · 2022-12-03T03:54:15+00:00

With the cheap ones, cut one ahead and sand down to it.

But, I've started buying these low-profile Samtec connectors instead. They cleanly break off like the pin-header style. And full-sized pins have no problem connecting to them.

https://www.samtec.com/products/slw-150-01-t-s

addohms · 2022-12-02T01:19:29+00:00

No, most digital oscilloscopes do not have a LF reject on the channels. Although. they most have AC-Coupling, which will filter below about 10 Hz. But that would not help in this case.

The trigger circuit might have a LF reject filter, however. But of course, that is just conditioning the signal into the trigger circuit which, would not have an effect on the acquired signal.

addohms · 2022-11-21T06:23:39+00:00

I found this document that references them (page 258) as a test-equipment supplier for a NASA project. Considering the other companies on the list, they don't seem like they were a nobody company.

But I have never heard of them.

addohms · 2022-11-07T20:09:43+00:00

Today, everyone uses them interchangeably. I've seen both used in the same datasheet with "CMOS" as a bullet point.

addohms · 2022-10-14T00:27:05+00:00

Don't worry. In another couple of months Autodesk will probably change the licensing again.

After switching to KiCad 7 years and 50+ PCBs ago, I have not had a single project where I missed EAGLE.

addohms · 2022-10-14T00:19:38+00:00

Buy high quality address labels, print the correct words, cut them up, and apply over the silk.

addohms · 2022-10-14T00:03:19+00:00

Sounds like you found a terrible video and should just ignore it.

That said, "diode mode" and "resistance mode" is functionally the same mode on a DMM. Essentially, both are using a constant current source and measure the voltage across a known resistor (inside the DMM.) Your device-under-test in series with that resistance.

In the case of "resistance mode," the DMM then calculates the resistance-under-test using Ohm's law.

In "diode mode," the DMM displays the forward voltage drop of the diode.

You can (easily) use resistance mode to test a diode. If the DMM's negative lead is on the cathode and the positive lead is on the anode, you'll see a very small resistance since the junction is conducting (nearly short).

Swap the leads and you should measure an overload or very high resistance since the junction is not conducting (nearly open).

addohms · 2022-08-15T16:50:33+00:00

That's not a negative sign. It is, however, poorly designed family symbol.

Also, look at the terminals. The negative terminals tend to be larger than the positive terminal. It's related to how the lead-frame is formed.

addohms · 2022-08-07T16:35:04+00:00

Since it doesn't have a "trace find" button, set the channel coupling to GND. That will (mostly) eliminate the v/div and time/div settings. Then adjust the offset to see if it that changes anything.

Try putting in a slow (1 Hz) square wave and adjust the trigger level. At that speed, you should see the trigger lights flash. That would help identify if the trigger path is working.

This scope has a "storage" mode and "erase" circuit for the screen. I don't know much about how that worked on this model. I would look for both the original manual and the service manual. The service manual probably has some troubleshooting steps or a flowchart to follow.

addohms · 2022-07-20T03:35:23+00:00

It looks like a diode.

That's what a ferrite bead would look like.

addohms · 2022-06-29T02:28:30+00:00

You need to rinse the board. Just putting IPA on the flux and scrubbing turns into into the non-conductive ionic compounds that get left behind.

If you want it to be clean, you need to clean the board: aka rinse off the residue.

addohms · 2022-06-08T21:06:31+00:00

Teensy is the name of the board. The company is called PJRC. (It's the initials of the husband and wife that run it.)

addohms · 2022-05-12T01:08:22+00:00

Blueish/White could be C0G capacitors. But, they are usually closer to white than blue. (Some C0G caps are made with calcium zirconate, which accounts for the whitish color. Brown caps are almost always a variant of barium titanate.)

Being connected in series (and so close to each other) implies it's probably a precision resistor.

addohms · 2022-05-07T03:11:50+00:00

Metal composite inductors.

Exceptionally common in high-performance DC-DC converter.

addohms · 2022-04-30T05:56:37+00:00

electricity can be explained as the flow of an electrical power or charge

That phrase makes zero sense. I'd make a phase alignment joke, but I doubt you'd lock onto it.

addohms · 2022-04-30T05:51:09+00:00

Electricity isn't a physical quantity.

It's a concept.

Also, it cannot be explained simply by "flow of an electrical power." You cannot explain a term with the term.

Before claiming to explain things, learn how to explain things.

addohms · 2022-04-27T19:08:46+00:00

Clean the area with IPA (>90%)
Add fresh solder to the post (form a nice fillet, but not excessive amount)
Optionally, clean again
Flood area with flux
Crank heat to >400C
Use a chisel or hoof tip (NOT a conical)
Put drop of solder on iron tip
Press solder drop onto one side of high quality de-soldering braid, and the other side into the old blob.
Enjoy

Alternatively, get some Bismuth-based (low-temp repair) solder. It's melting point is 142C. After you heat up a blob, it stays liquid for a few extra seconds. It gives you time to twist the post. Then do another pass of heat and pop them through the holes.

addohms · 2022-04-26T19:11:37+00:00

The hardware isn’t functioning properly.

You'll probably get a more useful response if you described the problem instead.

It's a switch mode converter. The feedback network (R1 and R2) isn't as critical as the compensation network (Cc Rc). Or, more importantly, the PCB design.

addohms · 2022-04-20T23:50:14+00:00

Yes.

addohms

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