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What's happening in this video? Electricity on fence
Given the comments re lack of rain and low humidity and 60Hz buzz, I would guess its the result of a ...
13-3-2019 at 18:35
by: Twospoons
Questions about water electrolysis for H2 & O2 production - what electrolyte & plate material
https://news.stanford.edu/2015/06/23/water-splitter-catalyst-062315/

So a crude approximation of ...
28-2-2019 at 20:48
by: Twospoons
Questions about water electrolysis for H2 & O2 production - what electrolyte & plate material
I built mine using SS plates (316 from memory) and non-woven polypropylene cloth as a separator ( th ...
27-2-2019 at 21:15
by: Twospoons
Cutting grooves on Al2O3 tube, carbide or diamond?
If you use Kanthal instead of nichrome you have less risk of shorting. On heating Kanthal builds a ...
24-2-2019 at 12:41
by: Twospoons
Use Diesel Fuel for a Stronger Vacuum with Water Aspirator?
And if you're going to use mercury then a sprengel pump might be the answer.
https://en.wikipedia.o ...
21-2-2019 at 15:04
by: Twospoons
Use Diesel Fuel for a Stronger Vacuum with Water Aspirator?
If you are starting to look at exotic fluids for your aspirator, maybe its time to just buy a mechan ...
21-2-2019 at 13:25
by: Twospoons
Verbs for measuring length, volume and other physical quantities
Sound and plumb are verbs for measuring depth. Sound is used specifically for water depth.

Titrat ...
20-2-2019 at 14:15
by: Twospoons
What material should be used as a vacuum seal?
Neoprene is better than silicone. The gas permeability of silicone is surprisingly high. I make a pr ...
17-2-2019 at 12:24
by: Twospoons
High temp conductive material for mounting cartridge heaters
I think graphite would be your best best. Not only is it good thermally, it will also act as a lubri ...
14-2-2019 at 13:16
by: Twospoons
Organic oxidizers which can be electrochemically recycled
With your O2 gas - have you considered ionising it at low pressure? Either RF or dielectric barrier ...
13-2-2019 at 20:59
by: Twospoons
What to do with lots of plastic packaging ?
You don't have lots of old newspaper to use instead?
I would hope someone would be able to re-use ...
11-2-2019 at 14:24
by: Twospoons
Anyone use a multimeter/voltmeter with USB/PC output?
I have a Keysight multimeter with an isolated PC interface, but that cost me NZD400 (~USD250) so pro ...
24-1-2019 at 14:06
by: Twospoons
Strange earthing problem
[rquote=585569&tid=131185&author=wg48]
Below is a 24V Weller with an earth. The Rolls Rorce ...
17-1-2019 at 13:20
by: Twospoons
Mom-and-pop lemonade-stand-style ways to make quick legal cash from chemistry
Paint pigments or dyes might be a winner. I'm sure there are plenty of artists would love to play wi ...
9-1-2019 at 20:40
by: Twospoons
How to repair a thermocouple?
Your 50/50 solder probably does have an aggressive flux, given the usual application for that alloy ...
6-1-2019 at 15:16
by: Twospoons
'Sudden Deceleration' Suit, or John Stapp's Revenge
Concussion results from the brain smacking into the inside of the skull. Its about as protected as i ...
6-1-2019 at 11:43
by: Twospoons
How to repair a thermocouple?
I've used the arc from a neon sign transformer to make thermocouples. Melts a nice little ball on th ...
6-1-2019 at 11:35
by: Twospoons
Stopping oils and fats from becing rancid - novel idea
For oils the obvious solution is storage in a collapsible bladder, as used in cardboard cask wine. N ...
28-12-2018 at 16:35
by: Twospoons
Looking For: Fluoropolymer Tubing
Plenty of low cost options at Aliexpress.com. The 3.1mm ID PTFE tubing is used extensively in 3d pri ...
21-12-2018 at 15:11
by: Twospoons
I need help with optoisolators. . .
[rquote=564119&tid=113080&author=Intergalactic_Captain]
I'm still curious though if anyone ...
17-12-2018 at 12:21
by: Twospoons
Apples, Cider, Vinegar question
Frankly I think you should have stopped your fermentation at "cider". :D
I made a dry sparkling ci ...
2-12-2018 at 16:44
by: Twospoons
Say goodbye to cheap Chinese shipping
Sometimes that's a trick to make an item look cheaper than everyone elses, then they make their mone ...
30-11-2018 at 21:51
by: Twospoons
Apples, Cider, Vinegar question
Production of alcohol via yeast + sugar requires anaerobic conditions, otherwise you just get CO2 a ...
30-11-2018 at 15:09
by: Twospoons
Stability and precision of Hall-based current sensors?
[rquote=553509&tid=103892&author=Fulmen] winding a solid core for testing purposes shouldn't ...
16-11-2018 at 13:38
by: Twospoons
Stability and precision of Hall-based current sensors?
[rquote=552949&tid=103892&author=wg48]
Putting it differently is Rogowski coil nothing mo ...
15-11-2018 at 14:38
by: Twospoons
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