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Search: Posts Made By: Barrowman
Forum: Appliances & Gadgets 12-22-23, 09:14 AM
Replies: 159
Views: 258,790
Posted By Barrowman
Ahh forgetting this is an American site so...

Ahh forgetting this is an American site so aluminum and tire :<)
Forum: Appliances & Gadgets 12-22-23, 09:13 AM
Replies: 159
Views: 258,790
Posted By Barrowman
As xringer says an aluminium rim would eliminate...

As xringer says an aluminium rim would eliminate the problem but also the speed at which the magnets pass the coils would be much higher than at the hub so that would improve the output I think. I...
Forum: Solar Heating 12-15-23, 03:12 PM
Replies: 29
Views: 54,030
Posted By Barrowman
As the temperature of the heat source increases...

As the temperature of the heat source increases the wavelength of the light( and heat ) gets shorter. As the sun is so hot the light easily passes through the glass. When it heats the black material...
Forum: Appliances & Gadgets 12-12-23, 04:12 PM
Replies: 12
Views: 54,286
Posted By Barrowman
The printer you linked to looks good for the...

The printer you linked to looks good for the price. You can download many 10's of 1000's of stl files from thingiverse. You can download the Creality slicer app and use it to create gcode - the...
Forum: Appliances & Gadgets 12-12-23, 08:45 AM
Replies: 5
Views: 27,820
Posted By Barrowman
The ones I mentioned say Noise:26dBA. And some...

The ones I mentioned say Noise:26dBA. And some 30mm ones say 15.92dBA which I can get 6 for GBP10. No idea what airflow they produce as it's not stated. Bigger fans would need to be tilted quite a...
Forum: Appliances & Gadgets 12-12-23, 03:23 AM
Replies: 5
Views: 27,820
Posted By Barrowman
Thanks Piwoslaw. it's as I thought. We do have...

Thanks Piwoslaw. it's as I thought. We do have the thin radiators. Because the air nearer the ceiling will be the hottest in the room then that's where the greatest Δt will be causing more heat loss...
Forum: Appliances & Gadgets 12-11-23, 02:11 PM
Replies: 5
Views: 27,820
Posted By Barrowman
Question Improving central heating

Like many people we have gas central heating. What I often wonder about is trying to make it work better. What I am thinking about is how the heat fills the room. So the heating comes on, the...
Forum: Appliances & Gadgets 12-11-23, 10:11 AM
Replies: 12
Views: 54,286
Posted By Barrowman
Here I go again reading old threads. I've thought...

Here I go again reading old threads. I've thought about them for a few years and always thought what xringer said but it was our 60th anniversary last February and my wife said "get one it doesn't...
Forum: Appliances & Gadgets 12-06-23, 03:50 PM
Replies: 6
Views: 18,633
Posted By Barrowman
A small peristaltic pump would work. You can get...

A small peristaltic pump would work. You can get a 12 volt one which delivers about 70mls/min but you can run it at a lower voltage as long as you don't want to pump to a great height. It will then...
Forum: Appliances & Gadgets 12-04-23, 04:08 PM
Replies: 159
Views: 258,790
Posted By Barrowman
I can imagine why it was your best years:) I...

I can imagine why it was your best years:)
I got interested in electronics when I was 12. Built a crystal set and listened to the local factory delivery drivers. Soon got roped in to mending radios...
Forum: Appliances & Gadgets 12-04-23, 11:57 AM
Replies: 159
Views: 258,790
Posted By Barrowman
Hi Xringer, yes I'm feeling old myself. I was 80...

Hi Xringer, yes I'm feeling old myself. I was 80 last week. I have a bunch of the neodymium magnets. They can nip you if you're not careful. It seems everyone who makes their own wind turbine uses...
Forum: Appliances & Gadgets 12-03-23, 09:02 AM
Replies: 159
Views: 258,790
Posted By Barrowman
Re: bicycle generator

I've been reading through this old thread and wondered what you might think of having lots of magnets around the wheel rim and coils placed close to them so the whole thing becomes the generator....
Forum: Solar Power 01-04-23, 03:56 PM
Replies: 1
Views: 6,655
Posted By Barrowman
IGBT's can handle serious voltage and huge amps....

IGBT's can handle serious voltage and huge amps. Specs of this for example.
Semikron SKM100GB125DN Dual Half Bridge IGBT Module, 100 A 1200 V, 7-Pin SEMITRANS2, Panel Mount
Forum: Solar Power 01-04-23, 03:35 PM
Replies: 16
Views: 19,740
Posted By Barrowman
I know this is an old thread but now I am...

I know this is an old thread but now I am thinking I could use an IGBT controlled by a pwm signal generated by an arduino to control the rms voltage to a PC psu. my system uses a solis inverter and...
Forum: Wind Power 03-30-22, 01:20 PM
Replies: 7
Views: 10,955
Posted By Barrowman
Yes I have heard of them and seen it in a news...

Yes I have heard of them and seen it in a news item as well. I think they will probably work quite well. However we need to bear in mind that the wind speed is likely to be quite high having been...
Forum: Wind Power 03-03-22, 06:50 AM
Replies: 7
Views: 10,955
Posted By Barrowman
Thanks for your input. I live in a village in...

Thanks for your input. I live in a village in Lincolnshire and I have no area big enough to fix a large Vwat and that one looked very good. So now I wonder if I could build something like that but on...
Forum: Wind Power 03-02-22, 03:30 AM
Replies: 7
Views: 10,955
Posted By Barrowman
Power from turbulent wind

Has anyone come across a design for a generator which takes advantage of turbulent wind? What I have been told generally is that low level turbines don't work well because they rely on the air not...
Forum: Solar Power 12-24-20, 02:03 AM
Replies: 16
Views: 19,740
Posted By Barrowman
Do you think that would be true even though there...

Do you think that would be true even though there would be varistors across each input?
Forum: Solar Power 12-24-20, 12:34 AM
Replies: 16
Views: 19,740
Posted By Barrowman
I don't intend to rob myself. As I said in an...

I don't intend to rob myself. As I said in an earlier post my home is on higher ground but around it the whole area is a flood plain. In a flood the whole area including my home could be without...
Forum: Solar Power 12-18-20, 04:02 PM
Replies: 16
Views: 19,740
Posted By Barrowman
More about my panels

I have been thinking about this some more and have more ideas as to getting this to safely work.
Assuming the approx. 500 volt no load output of the panel strings is correct several things come to...
Forum: Other Improvements 12-18-20, 03:14 AM
Replies: 2
Views: 7,789
Posted By Barrowman
Well this link...

Well this link https://en.wikipedia.org/wiki/Earth_battery has information and it has lots of links too.
I get the feeling that little actual practical work is being done now and that they have...
Forum: Other Improvements 12-17-20, 05:45 AM
Replies: 2
Views: 7,789
Posted By Barrowman
Earth Battery

Has anyone done any work on earth batteries?
Forum: Solar Power 11-01-20, 03:52 AM
Replies: 16
Views: 19,740
Posted By Barrowman
Okay thanks for the information Robi. I certainly...

Okay thanks for the information Robi. I certainly do get FIT. I get a cheque every 3 months and average about £60 per month.
I guess I will go for the timed battery charging, As you say it's very...
Forum: Solar Power 10-31-20, 04:48 PM
Replies: 17
Views: 40,869
Posted By Barrowman
I don't know what it's like there but in the UK...

I don't know what it's like there but in the UK switching a modem/router off each night will result in slowly reduce your internet speeds as the system assumes that the connection is too poor to...
Forum: Solar Power 10-31-20, 12:17 PM
Replies: 16
Views: 19,740
Posted By Barrowman
We moved back to England about 5 1/2 years ago....

We moved back to England about 5 1/2 years ago. The system had already been in place since early 2013 so we got a straight transfer from the last owners.
The cables from the panels look as if they...
Showing results 1 to 25 of 29

 
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