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Off grid living with solar DC and AC

rohitgandhii — Fri, 25 Jun 2021 03:00:00 GMT

I started building a hybrid solution 7 years ago. I am a journalist and an experimenter. I have 8.5KW AC. I have a 4KW invertor 48VDC that is analog and an invertor that is 12VDC.

I have 26 panels of 36V and 4 panels of 12 Volts. I have 5 lead acid batteries of 150 AH.

I run a submersible pump of 3KW DC with 10 panels.

My question is that is there a way to bring all the lower to one location when they are not being used for water and then distribute the DC supply better. I run out of power at about midnight

BK precision 8602 DC electronic load for Solar panel IV curve simulation

sreeharshab — Thu, 16 Apr 2020 12:42:11 GMT

Does BK precision 8602 DC electronic load has inbuilt option for IV curve simulation when a solar panel is connected. If there is no such an option, can someone help me towards relevant material/document as a guidance for using the 8602 model for collecting IV curves. I found a review discussion on element14 on using the BK 8602 to plot IV curve using html commands. However, the details are missing to understand the procedure.

Using dual output power supply in parallel

xueyin.agerris — Fri, 03 Apr 2020 06:25:15 GMT

I have a Tenma 72-1049572-10495 power supply with two outputs. Each output can deliver 5A current, but I want to use both in parallel to deliver up to 10A.

How can I hook up my load to the two outputs to work in parallel?

What settings do I have to configure to be in parallel operation?

Ic L6563H BLOWN ALL THE TIME

manzoor — Thu, 13 Feb 2020 19:29:26 GMT

Hi I have a fujistu desktop power supply dead . So I open testing all component in primary section and found fuse blown 250v 8amp. Mosfet 23nm60n blown . Ic L6563h blown other all component are tested ok so I replaced all with new one. Which I bought from online aliexpress. But the problem is same mosfet and ic again blown . There smd resistor smd capacitor all value are tested ok rectifier and all component. Then I again replace and the problem is same. Does any one faced problem like this please share I feel ic which I bought from aliexpress is not genuine which caused blown

What is the effect of switching noise?

mgurpreet — Mon, 13 Jan 2020 05:47:24 GMT

I am going to build a lab bench power supply using smps and LTC3780 step up and down regulator. Like a youtuber great scott built in a video which i will link below. Can such a bench power supply be used in laptop and mobile repair ?

What will be the effect of switching noise if I use that kind of supply in repair work?

Yotube video link https://youtu.be/wI-KYRdmx-E

component testing with keysight dsox1102g scope

johnwater — Sun, 05 Jan 2020 14:17:29 GMT

hello would like to learn how to measure components on my elenco am radio kit.

am new to electronics, trying to figure things out.

read about lissajous patterns, just need some direction as to how to set up my connections, see if components are functioning as necessary.

my 9 volt battery gets hot, no audio output,so i think i have short somewhere?

thanks

john

My 34970A keeps rebooting as soon as i power it on

skyllet20 — Tue, 20 Aug 2019 01:52:15 GMT

Hello there,

i've been using the data aquisitor 34970A34970A for years, and today when i powered it on, it just kept rebooting without allowing me to acces any of its functions.

Has anyone a clue about what is happening?

Here's a video of my problem

https://www.youtube.com/watch?v=oe8mVF4UhIQ

Thermal Pads on Some DC/DC Conveerters

dindea — Mon, 03 Dec 2018 10:59:24 GMT

E.g. Linear Technology's ADP2302/2303 has a thermal pad on the bottom side of the package. The data sheet says that this pad shall be soldered to a ground plane for thermal dissipation.

Two questions:

Is the pad connected to the internal ground? Are this pad and pin 7 (SOIC-8) interconnected? Is it necessary, for proper operation, to connect the thermal pad to ground? To me it seems reasonable that it would not be necessary. No "strong" currents will flow through the GND connection(s). All "strong" currents will flow through the P-switch and the external catch diode.

Wouldn't it be possible to make the thermal contact to a copper area with heat compound instead of soldering?

Screenshots from an InfiniiVision 1000 XSeries

jlangbridge — Sat, 18 Mar 2017 09:37:04 GMT

Scope Month is upon us, and we are right in the middle of it. I've entered in almost every day, since I really need a new scope, but for the time being, no luck. Oh well! Evey day, winners are picked, making some happy, and others jealous. However, the winners are announced in a video on YouTube, and there is always time for a quick tech tip or demonstration. From what I've seen, I'm really impressed by the InfiniiVision 1000 XSeries, but I still had some questions.

Oscilloscopes. Sooner or later, you'll need one. Prices vary from the amazingly cheap to the horrendously expensive, depending on your needs. I'm an educator, which means that I don't need the high end one (not yet, anyway). Which is good, educators aren't paid what you think they are.

As a lecturer and educator, I rely heavily on an oscilloscope to get my work done. I can draw things on a whiteboard (but I'll never be remembered as an artist), but some things you just can't draw, you need to see them. One thing that seems to stress students out is switch bouncing, and you really need to see it in action to understand it. And that needs a scope. My trusty TDS210 does indeed capture screenshots, but seriously, what PC has serial ports today? I press a button, and my Python script reads from a 57600 serial port to create a picture. To say this slows me down is an understatement. Those screen captures then go into a book, document or webpage. This is where I need something good, and this is, generally, not shown. So after a few days watching YouTube videos, I asked a question.

Hi, Daniel! (the name of the gentleman who is presenting this every single week day for an entire month). This is who I am, this is what I do. I'd really appreciate seeing some captures, do you have any?

I expected an answer, because he seems to spend half his day making videos and the other half answering just about every single comment made on said video. I expected a link, or something. I mean, he probably deserves a month off after Scope month, just to catch up on sleep. A simple answer would have sufficed. And a few minutes later (no, seriously, minutes), I get a ping on my phone. Answer to a YouTube comment. Sure, I can do that! Give me a while, and I'll get something to you. Well, thanks! It's Friday evening here in France, so no rush. Again, minutes later, I get an email. On my semi-pro email account. Not my GMail. From Daniel. Himself. Hey, I believe you are the person who asked for screenshots, here you go! Attached, two screenshots. Made especially for me. I was speechless. I mean, seriously, how does he do stuff this quickly?

So, here I am. If I need screenshots, then maybe others do too, so I'm sharing them here. I like what I see; the outputs are crystal clear, and I love the ground pointer (yes, details are important). Date and time, acquisition modes and settings are all there, and just look at those serial traces! (with parity errors, showing the reaction, even better!).

Anyway, Scope month continues, and I'm still entering in every day. Fingers crossed. However, you can enter too. Yeah, I know, more adversaries, and less chances for me to win, but still, go ahead and enter. Or maybe enter in for the roadtest (but read through the rules first. Important). KeySight have done an amazing job with Scope Month, and have spent a large amount of resources on this (time and money). Go ahead and have a look at their videos, they have some excellent tutorials.

Attachments:

Eliminar calor en la aplicación del LM2596

Former Member — Mon, 18 Apr 2016 23:58:11 GMT

Hola.

estoy en un proyecto donde se está creando un dispositivo que va en un auto, donde lo general su carga de batería maxima es de 14v, y se requieren 5v en el dispositivo instalado, quisiera alguna opinión de como evitar o reducir el calor producido por el regulador LM2596 o alguna otra opción.

Saludos y espero puedan ayudar

9v from modern ATX PSU for Ethernet Switch

ats1995 — Sun, 03 May 2015 01:42:30 GMT

Long time reader, first time poster. I've over time found it handy having a switch around since I often tinker with Raspberry Pis, among other things. Since most desktop computers have way more volume inside the case than needed, I think it would be ideal to permanently mount it inside (to avoid clutter etc.) and draw power from its PSU instead of having yet another wall adapter.

My switch has the id TL-SG108. The adapter is rated at 9v at 0.85A. Intuitively I think this should be easy, but after extensive googling (my knowledge on electricity is too limited to figure something out myself) I have yet to find a solution.

Any help and suggestions are appreciated!

Looking for the MC1466L

Former Member — Wed, 25 May 2011 01:36:41 GMT

Want to build a multiple output PS, preferably with this chip. Unfortunately, having a road block finding it. 10 years out of production but was hoping someone knew of a reliable source. Lots of counterfeights out there. I found a discrete equalalent version someone created but kinda the last resort. If truly is not available, any suggestions? I want contstant voltage/current in the 50V / 5A range. I like the MC1466L since it is a floating regulator, limited only by pass elements.