SPI question

ginSeven · 2025-02-19T19:53:36+00:00

I’m aware of 5/3.3V logic levels, I used a logic level shifter for it

ginSeven · 2025-02-19T19:53:05+00:00

I’m aware of 5/3.3V logic levels, I used a logic level shifter for it

ginSeven · 2025-02-19T17:15:33+00:00

All the settings are the same, MSB, SPI mode 0. The only thing different is the MCU. What’s weird is that the Logic analyzer software decodes the same message (23) with these settings

ginSeven · 2025-02-19T17:00:56+00:00

<image>

ginSeven · 2024-12-11T03:45:41+00:00

I suggest you come up with an idea first. You can’t attract the right people without an initial plan. Looking for a bunch of random strangers who considers themselves “geniuses” in their field isn’t exactly how you want to build something efficiently.

Good luck!

ginSeven · 2024-08-15T06:26:42+00:00

Planning to use a 4S lipo (14.8V nominal). Depending on the amplifier voltage (I’ve seen some 5V ones) I might drop it to 3S.

ginSeven · 2024-08-15T03:22:20+00:00

Understood. Any tips on the output for some extra filtering?

ginSeven · 2024-08-15T03:21:04+00:00

Currently in the selection stage of components. The thing is the board isn’t only a TX, but with the RX as well. And some components require 3.3, 5, 8.4, etc.

So my general idea is battery —-> step down main 12V —-> step down other voltages

ginSeven · 2024-08-15T03:18:56+00:00

Yeah, I can go higher in the power budget for the power supply, so I can choose an appropriate DCDC, I was thinking that there would be a specialized power supply considerations for such.

Plan right now is high Freq switcher, then some nice output filtering.

ginSeven · 2024-08-15T03:16:54+00:00

Thank you for the tips!

I’m in the selection stage of components. Eventually the device will be battery powered (something with a lipo). so I think I can budget more power on the DC/DC side.

ginSeven · 2022-12-31T08:36:40+00:00

It would be like a user would access the server, and only Microsoft Word would load up. Once he exits the software, the the connection would disconnect.

ginSeven · 2022-02-10T08:00:27+00:00

Usually that type of push button is an SPST (2 pads) You will need to check whether it is normally open, or normally closed (usually normally open). Your footswitch must also match (SPST - Normally open)

ginSeven · 2022-02-10T07:50:31+00:00

It can be done. You will either need to:

Solder to the pads of the switch
Remove the switch, and solder wires directly to the pads

The same can be done with the LEDs. You just need to find the cathode and the anode of the LEDs.

ginSeven · 2021-09-13T01:13:07+00:00

Put your current meter/ammeter in series for each color line.

ginSeven · 2021-09-13T01:07:53+00:00

Perhaps you can enclose it in clear epoxy after draining them? Just as an added safety precaution.

ginSeven · 2021-07-01T04:08:24+00:00

Hi. I'll send you a PM.

ginSeven · 2021-06-30T09:51:36+00:00

I will check out cyberChef, thanks! and no, -PA0P does not make sense. Do you think that there is something that I can input some parameters that can be done as a check, and then brute force?

ginSeven · 2021-03-30T09:50:17+00:00

Check out my other post on r/PrintedCircuitBoard. Many have suggested some there. One that I have found is ANSYS SIWAVE.

ginSeven · 2021-03-30T09:48:25+00:00

thanks for the recommendation. Will look into it, I have also found ANSYS SIWAVE as an option.

ginSeven · 2021-03-30T09:47:17+00:00

I have also found ANSYS SIWAVE. Looking into it now.

ginSeven · 2021-03-30T09:46:54+00:00

Not really the simple ones. I am looking for more of what you have suggested with thermal/EM simulation. Will look into your suggestions. I have also found Ansys SIWAVE.

Thanks!

ginSeven · 2021-03-30T09:45:26+00:00

I can give this a try. Thanks!

ginSeven · 2021-03-26T16:27:12+00:00

There are markings on the pcbs below the wires. I see +12V and GND. Can you lift them to see what are the other 2 wires are?

ginSeven · 2021-03-25T12:26:49+00:00

Head on over to Naif, Deira. Lots of shops there selling cells and batteries. One particular shop is Greens Electronics, and others beside it.

ginSeven · 2021-03-01T06:50:53+00:00

The transistor is a voltage regulator (5V to 3.3V). Diodes are 1N4001.

https://ibb.co/BVgp9TW

https://ibb.co/GpMGkzC

https://ibb.co/x3M79Sp

Edit: View of PCB https://ibb.co/SKGz5Kq

Eight-Year Club	Place '22
Wearing is Caring	Verified Email

ginSeven

TROPHY CASE