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Reclaimed Gold Pins from Cellphones
You do realise that those pins are merely plated with gold, not solid - with said plating likely bei ...
17-5-2016 at 18:31
by: Twospoons
UV-C L.E.D. ebay source
If you are in the market for deep UV Leds ... [url=http://www.roithner-laser.com/deepuv_to_select.ht ...
14-5-2016 at 01:25
by: Twospoons
Compressor for CO2, oxygen
Whatever you do don't run pure O2 into a compressor that is not specifically designed for it. Bad th ...
12-5-2016 at 19:47
by: Twospoons
uv for tlc
250nm is short enough you need to be very careful. I'd avoid any skin exposure, not just eyes. Any s ...
4-5-2016 at 15:56
by: Twospoons
Building a Heating Element?
The chip handles the cold junction compensation with an internal temperature sensor, so its importan ...
2-5-2016 at 18:50
by: Twospoons
Building a Heating Element?
[url=https://www.maximintegrated.com/en/products/analog/sensors-and-sensor-interface/MAX31855.html]T ...
2-5-2016 at 16:41
by: Twospoons
Building a Heating Element?
If I were you I'd just buy a PID controller - you get a nice display and controls in a nice case wi ...
1-5-2016 at 19:38
by: Twospoons
Basic Induction Heater Safety?
RF and AC are the same thing, just different frequency. I'd say don't touch - the work coil could ea ...
17-4-2016 at 14:25
by: Twospoons
Combining low voltage induction heaters?
There is a reasonable chance that simply putting the work coils from several ZVS units next to each ...
11-4-2016 at 21:58
by: Twospoons
diy gas torch
Where I come from its known as a kerosene blow lamp. They put out a truly impressive amount of heat ...
7-4-2016 at 14:17
by: Twospoons
Curious corrosion formation
We're carrying out salt fog corrosion tests at work, and one of the test pieces has produced these w ...
9-3-2016 at 18:23
by: Twospoons
Sintering ceramics at half temps + 100vCm2
[rquote=439012&tid=23523&author=3DTOPO]

Morganism: is a magnetron sufficient to induce en ...
15-2-2016 at 17:04
by: Twospoons
Using a computer to control a pump/motor using whatever means possible
http://www.phidgets.com/products.php?category=0&product_id=1002_0

problem solved?
These guys ...
9-2-2016 at 16:11
by: Twospoons
When Chemistry Goes Wrong
I built an electrolyser with a gas separator and NaOH as the electrolyte. I was using it to fill tw ...
8-11-2015 at 17:56
by: Twospoons
Deposit Silver on PVC
Flame treatment might be tricky, but i think plasma treatment using an atmospheric pressure dielectr ...
5-11-2015 at 20:01
by: Twospoons
PCB etchant
Its definitely a mechanical cooling effect. Metal cutting lasers need fairly high power densities be ...
27-10-2015 at 14:16
by: Twospoons
PCB etchant
There is another method, if you have access to a CO2 laser engraver. You can spray the bare copper w ...
22-10-2015 at 17:39
by: Twospoons
PCB etchant
I have used the toner transfer method successfully for many years, as outlined above by m1tanker78. ...
18-10-2015 at 19:36
by: Twospoons
The wee 100w LED torch project
[rquote=423060&tid=63923&author=Sulaiman]
I can understand why different 'columns' of LEDs ...
13-10-2015 at 13:32
by: Twospoons
Constructing a vacuum chamber
The other starting point for your chamber could be an empty propane or LPG cylinder. They come in ma ...
22-9-2015 at 14:29
by: Twospoons
Acetone based wood paint stripping
I had great success using sodium hydroxide thickened with corn starch, and with a little detergent t ...
2-7-2014 at 16:24
by: Twospoons
Total lunar eclipse over North America
I had nothing but cloud cover. :(
Still, i've seen some pretty good lunar eclipses in the past - an ...
15-4-2014 at 21:08
by: Twospoons
The π is a lie!
Also τ is used in electronics to denote the time constant of a circuit, and pi is used in v ...
13-4-2014 at 22:08
by: Twospoons
The π is a lie!
If you find a factor of 2 confusing, then maths is not for you.

One rationale for pi is that if y ...
13-4-2014 at 20:16
by: Twospoons
Health effects - Coal smoke
Its an open cast mine, so the fix is not that simple.
6-3-2014 at 20:56
by: Twospoons
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