Hey friends,
first of all: Sorry, had to take a video to explain my problem. it is simply too complicated.
And yes: the two cables are connected to the same point, like it is on the socket version.
Then do want us to make a video explaining the complicated solution?
1 Like
Your first error is using the LM7805 like you are. That device requires about 3 volts more on the input than its output. In your case it would need 8 volts or more. The 5.1 volts from your buck converter is the same as the 5.1 volts from your wall outlet power supply. That should be adequate by itself without the need for the 7805. Either that or use the 7805 directly powered by the battery. You may need to use a heat sink on the 7805 depending on the power required.
Other than that you may have a polarity reversed somewhere in your circuit or you may have miswired the 7805. Your device may already be destroyed because of the damage that has already been done.
1 Like
Yes, a colleague of mine (a beginner), said the same: the voltage drop of 1V is too low for the LM7805.
I have solved it. The problem was this:
the board on the socket board (which runs good), has also run on the buck converter well.
The problem with the other board you saw on the video (which was soldered to the BuckConv) was this: earlier, I have connected it to a 6V power supply. But the board only accepts a maximum of 5.1V (so 5V would be okay too). But the 6V has damaged the board. This was the reason while it produced too much heat. Somethink inside got broken.
I have found it out, because I took the one on the socket board, and connected it to the BuckC (which had 5V). And it worked 
So at the end: I simply damaged the other board by connecting it to a 6V supply.
Sorry to learn that. I have just one more piece of advice for thee future. In th USA we have a saying: a picture is worth a thousand words. In electronics a schematic is worth more than that. If you had posted the schematics of both your circuits and described your problem in a few hundred words you would have gotten much better help.
1 Like
Okay Sorry man
And by the way: I'm the biggest fan of USA in Germany... best greetings to the United States, from Bielefeld, Germany. I can't wait to see the election results in 2024 <3
It’s going to be a bumpy ride. Don’t feel too bad about your post. It was pretty informative. I couldn’t quite make out what type of device you are working with.
1 Like
It is one of these cheap wifi repeaters down here.
My aim is: I wanna use this repeater as an signal booster for my ESP8266 12E.
Both are getting there power from a 12V Battery. I don't have a circuit yet. If you want me to draw one, I could do it tommorrow. You know, in Germany is sleeping time now
Have a good one, man.
[EDIT] forget to upload the image
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.