Recent Posts

1

General Discussion / How to choose a suitable power inverter?

« Last post by PRB617 on January 21, 2019, 04:10:07 PM »

Hi, I have no idea how can I choose a suitable power inverter for my home which is why I am here asking help from you guys and I am sure you guys will help me in finding the  best inverter.
Thanks!

2

General Discussion / Which is the best inverter?

« Last post by PRB617 on January 21, 2019, 04:07:28 PM »

Hello, as much I know about inverter I have heard about some brands like luminous, Duracell, Erayak etc. but I don’t know exactly which brand inverters are best. So, if anyone have that knowledge please share here.
Thanks!

3

General Discussion / Re: Two wires coming together via electromagnetic attraction

« Last post by ProBang2 on January 14, 2019, 02:10:14 AM »

My hope is: Your question was already answered.
If not:

Is it possible as shown in your picture? Nope, no way.

Why?

You need flowing current to generate an electromagnetic field.
Therefor you need a closed electric circuit.

Other options?

Yes. You need two parallel wires in wich the current flows in the same direction.
Each wire builds it own electromagnetic field. (Look: "Right-Hand-Rule".)

The effect is visible here.

Question now answered?

4

General Discussion / Re: Two wires coming together via electromagnetic attraction

« Last post by Sienova on January 03, 2019, 01:38:21 AM »

We are looking for all of this information to be considered as a good luck for us to meet.

5

Older Technology / Re: Just a little bit of flex

« Last post by Sienova on January 03, 2019, 01:37:14 AM »

I would like more suggestions for those who still have the understanding to ask.

6

Solar Power / How to improve low consumption electric motor powered with a mini solar panel ?

« Last post by sciencetoolbar on December 20, 2018, 08:04:52 AM »

Hello to all !
I managed to make a low consumption electric motor 67 milliwatts powered with a single small solar panel VIMUN SC 3012 - 2A (also inside an office calculator) exposed in artificial light.  It consists from a small solar panel, electronic circuit , air core and a neodymium sphere 19 mm diameter 27 g.

https://www.youtube.com/watch?v=3qr0PBhojw

Details : neodymium sphere 19 mm diameter - the key component Material NdFeB Shape, Sphere Diameter 19 mm Tolerance +/- 0,1 mm, Coating Chrome-plated (Ni-Cu-Ni-Cr), Manufacturing method sintered Magnetisation N38 Strength approx. 4,9 kg (approx. 48,1 N), Max. working temperature 80°C, Weight 27,2943 g, Curie temperature 310 °C, Residual magnetism Br 12200-12600 G, 1.22-1.26 T, Coercive field strength bHc 10.8-11.5 kOe, 860-915 kA/m - position of the poles up and down

There are a total of four electrical components. A small solar panel ( VIMUN SC-3012-2A, 29.44mm×11.6mm×1.1mm, 4 cells. The following specifications were listed, 2.0 Vos, 9.0 UAsc, 1.5 Vop, at 200Lux), a 470 uF 10 V electrolytic capacitor, a coil iron less with thin copper wire and a small circuit board with a black blob on it. Under this blob is the integrated circuit chip (HT111A1)

the electrical components ( excepting the coil are from a solar toy )

Thx
St

7

YouTube Video Episodes / T4D #135 - About Time...Epoch Clock

« Last post by SeanB on December 19, 2018, 02:33:42 PM »

T4D #135 - About Time...Epoch Clock

https://www.youtube.com/watch?v=j97CBAxznJk

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Older Technology / Re: Just a little bit of flex

« Last post by SeanB on December 06, 2018, 01:30:58 PM »

I would guess whatever came close that was smaller than the spider. Gecko, smaller spiders, small rodents, snakes would all rate as prospective dinner fare.

9

Older Technology / Re: Just a little bit of flex

« Last post by Mr Eastwood on December 05, 2018, 02:01:36 PM »

Interesting construction.

What's the spider feed on,  stray cats?

10

Older Technology / Just a little bit of flex

« Last post by SeanB on November 14, 2018, 02:56:26 PM »

Was looking for something, and came across this, so decided to post a picture or two of it.

Old flex PCB with 2 Panaplex displays on it, and the drivers. Designed to be folded up into a very compact display, and with the tiny little sugar cube size power supply as well, and the supply decoupling capacitor being too big to mount on the board, they simply gave it longer leads.

Last is a little thing I moved this morning, took from indoors and left outside in a nice sheltered spot where she can get some food and hopefully not interact with people again. Most people are afraid of Baboon spiders, though they do make nice pets once they get used to you.

Cannot show this to my neighbour, she would make a new exit, as she is afraid of even the littlest hunting spider.