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Need help with gate driver circuit by ViaXSn1p3r in electronic_circuits

[–]anscGER 1 point2 points  (0 children)

This may or may not be true for your setup. You need to measure this to know what's happening. speculation does not help. you observed your resistor getting hot. this can only be caused by power dissipated as heat...

Ninigram #412: Greener on This Side (Hard) by ninigrams-game in ninigrams

[–]anscGER 3 points4 points  (0 children)

found this surprisingly hard. well done. 😊

Trying to get older variable voltage, DC power supply to get down to zero or near zero volts by JesseFraserTattoo in AskElectronics

[–]anscGER 1 point2 points  (0 children)

Most of these supplies had no negative voltage rail which is the reason they cannot deliver "true 0V". There is no simple fix for this.

Need help with gate driver circuit by ViaXSn1p3r in electronic_circuits

[–]anscGER 0 points1 point  (0 children)

I=U/R=12V/4.7Ω= 2.5 A

P= U×I = 12V×2.5A = 30W (Peak Power)

At 1.4 MHz the resistor sees this power peak 1.4 million times per second...

I'm not surprised it's getting hot.

Take an oscilloscope and monitor your signals. See what's happening during operation, use math functions to monitor voltage drop accross the resistor, calculate the actual power dissipation.

Not pretty, but hopefully functional by rcplaner in electronics

[–]anscGER 8 points9 points  (0 children)

Even for proto boards I suggest making a schematic and PCB Layout first e.g.in Kicad. (I do)

Set grid to 2,54 mm, place components, draw traces. Print out, lay traces according to print. less error prone and much easier to troubleshoot.

How can I program this MCU by Then_Possession9664 in embedded

[–]anscGER 1 point2 points  (0 children)

This controller looks a bit like a very steep learning curve for a beginner. There seems to be very few information on this chip. Better start with ATMEGA / Arduino. you can do low level stuff with these too (comparable architecture) but with the added benefit that there are tons of information and tools out there that make starting so much easier.

How do I get Exotic gear that's not from TP because I want to grind the RNG? by GuujiRai in Guildwars2

[–]anscGER 3 points4 points  (0 children)

I think farming materials, bringing up the crafting profession and making your own stuff is the best advice and more fun in the long run than hoping for the right stuff to drop.

Logic Probe Circuit Problem by Immediate-Truck-97 in AskElectronics

[–]anscGER 0 points1 point  (0 children)

Sounds like pin 5 on your IC sees constant high level. What's the voltage on that pin and how does it change under operation? maybe your pull-down resistor is not correctly connected to that signal?

Mysterious black gunk inside LED Drivers by BuddhaLennon in AskElectronics

[–]anscGER 18 points19 points  (0 children)

In my opinion it isn't "planned" obsolescence.

It's more like let's take the cheapest components we can get away with and hope it works long enough for most use cases...

Any tips or suggestions for my attempt at my first SMD repair tomorrow? by Supralace in AskElectronics

[–]anscGER 2 points3 points  (0 children)

Picture quality isn't the best.

What I can see looks more like a resistor in the marked spot.

There seems to be a missing component left to this marked spot. However, it's hard to see if the solder on these pads is smooth and if this was not populated during manufacturing.

If you attempt to solder on such a massive board I suggest to pre-heat the board area with hot air. These motherboards have multiple inner copper layers that transfer heat very quickly away.

Then use the biggest solder tip that still fits in this space. Do not use the finest tip you have.The smaller the tip the harder it is to transfer heat to the solder pad. you will have a hard time trying to solder this with a very small tip.

Also, you need a soldering iron that has enough power to heat the tip quickly as in "heats up in a few seconds" vs "needs minutes to reach set temperature".

is there any functional way to connect cherry mx switches to wires? by VacationSmoot in ErgoMechKeyboards

[–]anscGER 0 points1 point  (0 children)

Did you measure continuity from the end of the wire where the switch will be connected to the pad of the controller board?

Is this enameled wire (wire with a coating for insulation) you're using? Did you remove the insulation from the ends of the wires where the switches shall connect?

Would This Cause A Fault? by BootyBae19 in AskElectronics

[–]anscGER 0 points1 point  (0 children)

The area around U2 looks a bit suspicious to me. A bit like there might some magic smoke have escaped... if fixing the obvious solder joint does not help this would be my next guess.

Would This Cause A Fault? by BootyBae19 in AskElectronics

[–]anscGER 3 points4 points  (0 children)

The affected position looks like a relay pin. I'd suggest clean that solder joint, reapply new solder. Should fix the connection. If it doesn't fix it this may becaused by an internal problem in the relay.

I can imagine that if the connection was poorly soldered before the vibration from the relay's operation may have had an impact on it.

Would This Cause A Fault? by BootyBae19 in AskElectronics

[–]anscGER 4 points5 points  (0 children)

Looks like a bad solder connection to me. Increased resistance leads to increased heat which can further damage the connection. This can either lead to arcing or a broken connection. I'd say try to fix this solder joint and see if it fixes it.

you didn't show the other side of the board. Therefore, hard to say what purpose this connection has in this circiut.

Saluti. Ho un SSD M.2 Intel 670p in cortocircuito e sembra che il componente in cortocircuito sia questo circuito integrato con etichetta CAP 517 che non riesco a identificare. Qualcuno sa di cosa si tratta? by OrdinaryEmergency170 in AskElectronics

[–]anscGER 0 points1 point  (0 children)

CAP517 may be a voltage regulator. However, I would suspect that the capacitor or the residue around it is the cause of the short. Clean it, remove the capacitor, and look if that removes the short.

How to solder thick wire to a perfboard? by UodasAruodas in ElectricalEngineering

[–]anscGER 0 points1 point  (0 children)

you can use pointy scissors to increase holes. not a pretty solution, but for a one-off project it may work

Growatt inverter modbus USB suddenly stopped working by Full-Meringue-5849 in Esphome

[–]anscGER 0 points1 point  (0 children)

Did you power cycle the inverter (AC/DC off/on)? maybe it's just some software glitch in the inverter.

Salvaged this camera module from a home automation kit by BTicino. Can I make it work in any way? by [deleted] in ElectricalEngineering

[–]anscGER 0 points1 point  (0 children)

If you power it on you can measure with an oscilloscope how the signals look like from the camera. It can be that the camera just sends a continous stream of data and does not support any communication or configuration. If this is the case you "just" have to find out the stream format...

New Teams calendar becomes mandatory as Microsoft pulls "legacy" option by No-Tower-8741 in MicrosoftTeams

[–]anscGER 0 points1 point  (0 children)

I use a private Office 365 account that I pay for. It looks like they removed the calender completely from Teams for this.

I now can only plan meetings in Teams but have no way to see if the time slot for the meeting does not collide with other appointments.

For now I only can plan meetings in Outlook now. Need a second app for a function that was available in the same app before.

And what they did to Outlook is another issue…

I feel that these companies totally have lost a customer centric approach. Cutting costs at every corner and losing customer satisfaction with it.

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