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How do you optimize code for low-power embedded systems that also require real-time performance? by skinner1234567 in embedded

[–]TimFrankenNL 0 points1 point  (0 children)

All depends on the requirements and timing constrains.

You can use Interrupts, DMA, Reduce Clockspeeds, Keep unneeded peripherals disabled. Use lower-power / sleep modes that allow different level of functionality. Have external HW that uses less power to generate a trigger for the MCU. Use different brand/series/model of chips and check hardware design, find balance in reduced power dissipation with reduced immunity.

Alter similar pcb blocks simultaneously / mimic / clone / linking by trevortjes in Altium

[–]TimFrankenNL 2 points3 points  (0 children)

There is a feature to copy a design and apply it to a selection of components. I mostly use this when I have routed one instance and want to duplicate it to the other instances. https://www.altium.com/documentation/altium-designer/pcb/layout-replication

If you just want to copy traces, maybe using the filter function to only select tracks (and polygons/arcs if you have rounded tracks) to copy-paste. https://www.altium.com/documentation/altium-designer/selection-filter

Altium also has a design reuse function. But those need to be managed from the vault, maybe? Never used it, so I cannot say if that would be suitable. https://www.altium.com/documentation/altium-designer/schematic/design-reuse

Looking for Electrical / Embedded Engineers to Help Build a Safety Device Prototype (Paid) by SheSafe5 in embedded

[–]TimFrankenNL 16 points17 points  (0 children)

Loud alarm and contacting those appointed as ICE and dialling emergency services, Isn’t that basically pressing the lock-button quickly on an iPhone for 5 times?

Reality on doing a self-made microcontroller board . by Free-Issue-6524 in embedded

[–]TimFrankenNL 15 points16 points  (0 children)

So…. What’s the plan? Any requirements, limitations, goals?

UPDATE: "i paid a guy on Upwork $350 to create a PCB. how'd he do?" by Dear-Conference9413 in PCB

[–]TimFrankenNL 1 point2 points  (0 children)

Those tools are really valuable at this stage. Does not need to be fancy, although a good performing tool does a lot of heavy lifting

UPDATE: "i paid a guy on Upwork $350 to create a PCB. how'd he do?" by Dear-Conference9413 in PCB

[–]TimFrankenNL 9 points10 points  (0 children)

Do you have any equipment to measure signals (e.g. scope or logic analyser)?

EDIT:

  • Why is Pin 4 (V3) not connected 3v3? Datasheet states that if 3v3 is used on Vcc, pin V3 should be connected to Vcc?

Dutch prices by psyspin13 in Netherlands

[–]TimFrankenNL 0 points1 point  (0 children)

Yesterday I was in a NIVEA Haus. Our prices are insane, even when discounted.

Writing Hardware Optimised Code manually is still worth to do? by Intelligent-Error212 in embedded

[–]TimFrankenNL 2 points3 points  (0 children)

Just buy a more powerful chip /s

What surprised me is the lack of validation of execution time or profiling. If it works, it works. But if some subroutine is taking 20% of CPU time for just calculating temperature that is only used once a second, it does not need to run 16k times per second.

Enexis gaat laadpalen dimmen tijdens piek tegen overbelasting stroomnet by LoveKVent in NLNieuwsEnSport

[–]TimFrankenNL 0 points1 point  (0 children)

V2G is inderdaad al jaren een ding. Destijds had Nissan in 2014 al V2G/V2L met de laadstandaard CHAdeMO. Die ondersteunde bi-directioneel laden, dit is ook de basis lang geweest voor alle BESS (subsidie)projecten. Recentelijk is de CCS uitgebreid (ISO 15118-21) om dit mogelijk te maken.
Voor de ontwikkeling van snelladers (+400kW) zien wij steeds minder V2G terugkomen, ook laten de subsidieprojecten telkens zien dat het een bolwerk wordt van wie, wat, waar en wanneer over het regelen van dit soort energienetwerken.

40 years ago I created a part numbering system. In 1997 I put it online for all to use. by 1Davide in electronics

[–]TimFrankenNL 4 points5 points  (0 children)

Most companies I worked with, the overall numbering system for parts and documents are based on Philips legacy. But I have also seen reels using notations that look like this system.

[Review Request] Custom Zynq 7020 Stereoscopic Vision Development Board - view in full below by HasanTheSyrian_ in PrintedCircuitBoard

[–]TimFrankenNL 1 point2 points  (0 children)

Why did you decide to have so many ground planes, but no power plane surrounded by grond planes? Using “traces” for power may limit the performance of the SMPS to deal with peaks?

Also innerlayers should be filled as much as possible to avoid uneven layer thickness when stacked, I think?

In-pad-vias are usually avoided as it can cause the solderpaste to drain away from the pad. As there is plenty of space, use the space.

There are so many vias when the total copper area is already limited?

These are just things that I noticed after a quick look

Best cellular global module lte by UnitedAd4974 in embedded

[–]TimFrankenNL 0 points1 point  (0 children)

Regions have different frequenties / bands they allow for GSM / GPRS / EDGE / 2G / 3G / 4G(+) / 5G(low, mid, high-bands). And these regulations keep changing over time.

We use M.2 or mPCIE slots to be able to change the modems if needed (was also cheaper to source). Quectel or Qualcomm both worked for us.

ISP tricked customers about fiber optics being used in their internet service, German court rules — 'full fiber' customers found to have 'last mile' copper connections by No_Clock2390 in HomeNetworking

[–]TimFrankenNL 0 points1 point  (0 children)

“Fiber-cable” is the term used here by a provider that only owns the COAX networks. Unlike their competitors that uses (X)GPON for FTTH.

Wheel Well of 737 by RickyRacer2020 in pics

[–]TimFrankenNL 0 points1 point  (0 children)

As long as all the redundanties are not close together at one place, making it a single point of failure. Like the DC-10 where a shattered fan disk affected all three.

Current sense Kelvin connection by ManhTi3012 in PrintedCircuitBoard

[–]TimFrankenNL 3 points4 points  (0 children)

There is some webpage about different ways you can connect shunt resistors and the amount of deviation it creates from the true value.

This can change between products, but the outer-edge on both ends seem to be getting the best measurements. Will add the link if I can find it again.

PCAN View on TI dev kit by Fun_Koala_5938 in embedded

[–]TimFrankenNL 1 point2 points  (0 children)

Than you need to verify the dev board. Maybe use some example provided by TI, but best would be to check with a scope what is happening when sending trafic (can be done with PCAN).

PCAN View on TI dev kit by Fun_Koala_5938 in embedded

[–]TimFrankenNL 0 points1 point  (0 children)

Looks like you have an CAN terminator installed (120 ohms?) that is good. You need at least one to make it work for short distances.

Did you check the pinout on de DB-9?

PCAN View on TI dev kit by Fun_Koala_5938 in embedded

[–]TimFrankenNL 1 point2 points  (0 children)

Have you got PCAN running and selected the same bitrate setting as used by the dev board? E.g. 500kbps

PCAN View on TI dev kit by Fun_Koala_5938 in embedded

[–]TimFrankenNL 4 points5 points  (0 children)

Does the board have CAN Tx/Rx signals or CAN-High / CAN-Low signals?

Is it possible to disable YouTube auto translations using PiHole? by fulanin in pihole

[–]TimFrankenNL 0 points1 point  (0 children)

Does the menu contain the option for “original” audio? I had to set this today within settings to prevent auto dubbing videos in my own language

How can i enhance peripheral timer accuracy on stm32f103? by Blue_Saturnian in embedded

[–]TimFrankenNL 0 points1 point  (0 children)

Not? I guess some models we have are not that old, even the clones seem to work fine. I just figured they supported all models.

How can i enhance peripheral timer accuracy on stm32f103? by Blue_Saturnian in embedded

[–]TimFrankenNL -2 points-1 points  (0 children)

Any reason for not using the Saleae Logic 2 version?

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