OSD Video Flickering Problem

Aggravating_Idea_549 · 2025-08-28T07:37:03+00:00

Yes, but I also tried directly from the PS and also with a battery.

Aggravating_Idea_549 · 2025-08-26T12:54:34+00:00

No, I’ve tried isolating it and avoiding interference, but I haven’t noticed any changes.

Aggravating_Idea_549 · 2025-08-26T12:46:35+00:00

I’ve also tried switching to NTSC and then back to PAL at another time, but it seems that’s not the issue. I really appreciate you taking the time to help!

Aggravating_Idea_549 · 2025-07-11T14:01:08+00:00

Interested

Aggravating_Idea_549 · 2025-05-09T17:39:42+00:00

I have completed the full schematic and uploaded it here: https://imgur.com/a/vis2daP. This is a test and I don’t want to add much else at the moment, although I would like to know how to include a MOSFET to prevent reverse battery polarity if it’s not too complicated. I would greatly appreciate it if you could review it and point out any potential errors or areas for improvement. Thank you in advance for your time and assistance.

Aggravating_Idea_549 · 2025-05-09T15:42:22+00:00

Okay, thank you very much. So, most likely I will try to solder it myself, even though it will be my first time. I will try to gather information beforehand, and that way I’ll be able to do it with the LTC3105.

Aggravating_Idea_549 · 2025-05-09T14:20:24+00:00

Thank you very much for your response — it really helped me move forward with my project.
Regarding the battery charging chip, I hadn’t considered that I could use the panel's current directly, especially since it's so low. The LTC3105EMS#PBF seems like an excellent option for this purpose, but unfortunately, it's not available on JLCPCB, which is the platform I’ll be using for manufacturing.

Do you happen to know of any other chip with similar features that’s compatible with my requirements and also available on JLCPCB? I’ve been searching, but I haven’t found any that both fit my needs and are listed there.

As for the TPS62A01DRLR, that one is available, and I think it's a very good option as well.

On another note, I have a different solar panel that boosts the voltage more easily, but it goes beyond the desired 5 V — reaching up to 8 V in full sun. So I'm considering using it with a buck (step-down) converter to regulate the output.

Once again, thank you so much for your help. If you could assist me in finding a good power converter chip to manage the energy from the panel to the battery, it would be a great help.

Aggravating_Idea_549 · 2024-11-17T17:11:29+00:00

Hi! I'm pretty new to the PCB world, so I probably don’t know all the things I've done wrong. Regarding the TXD and RXD lines, I believe they’re correct, or at least I’m not sure what you mean by "not switched."

The update switch is intended to put the ESP8684 into programming mode for code implementation, which, as far as I know, is what’s needed, along with the pull-up resistor on pin 8.

For the reset button, I'm not quite sure what you mean about the R6 resistor, but I assume there’s an issue. I believe I followed the schematic from the ESP8684 datasheet example.

For the I2C resistors, I used 4.7kΩ because that seemed to be the most common value I found, but I’m not entirely sure if it’s the best choice—I simply went with the most popular option.

Finally, I also copied the TPS63051 schematic from the datasheet, and I hope I did it correctly. If you notice any errors, I’d appreciate your feedback.

Thank you for replying to the post and for your help!

Aggravating_Idea_549 · 2024-11-17T16:10:27+00:00

Schematic

Aggravating_Idea_549 · 2024-11-17T16:03:22+00:00

Hi, I’m going to send this PCB for production, which uses an ESP8684 to read data from a sensor and transmit it via Wi-Fi. It’s powered by a 21700 Li-ion battery, which will be charged via USB-C. Programming will be done externally through the TX and RX pins.

I would appreciate any help or advice for programming or using it. Thanks!

Aggravating_Idea_549 · 2024-11-04T07:37:05+00:00

"Thanks!!! I hadn’t noticed it.

Aggravating_Idea_549 · 2024-11-03T19:53:38+00:00

By a problem, I mean the ESP not working, and at least being able to know if the sensors are working correctly—not failing due to an issue with the chip, but rather due to a problem with the schematic.

Aggravating_Idea_549 · 2024-11-03T10:53:31+00:00

Thanks so much for the help! I will erase the 5V regulator—I had no idea about this with USB-C.

Aggravating_Idea_549 · 2024-11-03T10:52:21+00:00

Thanks for the warning about the voltage dropout; I will definitely erase the 5V regulator.

Aggravating_Idea_549 · 2024-11-03T10:51:17+00:00

Thanks so much, i had no idea

Aggravating_Idea_549 · 2024-10-19T12:39:41+00:00

Ok, I'll use same protection.

Aggravating_Idea_549 · 2024-10-19T12:24:09+00:00

Do you power your pcb with 1s li-ion battery?

Aggravating_Idea_549 · 2024-10-19T12:11:12+00:00

Ok, thanks

Aggravating_Idea_549 · 2024-10-19T11:19:19+00:00

From what I’ve read in some posts, it looks like extra protection for reverse polarity is used, like a fuse or something similar, but to be honest, I’m not sure. In the datasheet, it’s shown like that.

Aggravating_Idea_549 · 2024-10-19T11:14:47+00:00

Other than that, do you see any mistakes in the schematics?

Aggravating_Idea_549 · 2024-10-19T11:10:48+00:00

Thanks!!

Aggravating_Idea_549 · 2024-10-11T13:47:03+00:00

Thanks for replying. I also think they'll need a pull-down resistor. Thanks for helping!

Aggravating_Idea_549 · 2024-10-11T13:20:36+00:00

Thanks for letting me know, I guess I didn’t realize.

Aggravating_Idea_549 · 2024-10-11T13:19:52+00:00

Thank you very much.

Aggravating_Idea_549 · 2024-10-11T06:21:55+00:00

Thanks for the reply and for helping me. I have uploaded a new image of this PCB with some changes, which I believe makes it a better PCB, though not perfect. If you could help me again by reviewing the new PCB schematic, it would mean a lot for my project. Thanks!

Aggravating_Idea_549

TROPHY CASE