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Making an acrylic büchner funnel
[rquote=512398&tid=81589&author=aga]
I guess it could all be 3D printed.

Easier as two p ...
2-4-2018 at 13:42
by: Twospoons
The fiberglass or ceramic material used to make heating mantels - what is it?
Carbon fiber is electrically conductive, so you can't use it around a nichrome element.
30-3-2018 at 16:38
by: Twospoons
DIY ramp, soak, pc parameter set up/monitor temperature controller
Nice to see realterm is still developing. I know the author, he was a work colleague for many years ...
30-3-2018 at 16:36
by: Twospoons
metal composites for 3d printing
I was thinking about the usual process for 3d printing in metal - namely laser sintering of metal po ...
21-3-2018 at 18:58
by: Twospoons
DIY ramp, soak, pc parameter set up/monitor temperature controller
[rquote=511113&tid=81301&author=Sulaiman]
but the time consuming part (for me) is the softw ...
18-3-2018 at 12:31
by: Twospoons
DIY ramp, soak, pc parameter set up/monitor temperature controller
Watch out with the max31855 - it does not like having the thermocouple grounded. As I found out with ...
17-3-2018 at 20:10
by: Twospoons
DIY ramp, soak, pc parameter set up/monitor temperature controller
A ramp / soak controller is a more complicated version of a standard temperature controller. Usually ...
17-3-2018 at 18:02
by: Twospoons
DIY ramp, soak, pc parameter set up/monitor temperature controller
The USB interface is achieved most simply with an FTDI usb-serial cable. The drivers are mature, and ...
17-3-2018 at 14:54
by: Twospoons
Colured smoke
If you are trying to see air currents you will want thin streams of smoke, not a room full. If it we ...
16-3-2018 at 14:04
by: Twospoons
Looking for a UK source of aluminium granules for a heat bath
Have you tried a machine shop? They may have aluminium swarf you can try for free.
11-3-2018 at 12:44
by: Twospoons
Electric matches, uniform resistance of bridge wires and reliability in series firing
5% resistors are cheap because of the volumes - in the billions annually. So its worth putting in th ...
7-3-2018 at 12:27
by: Twospoons
Electric matches, uniform resistance of bridge wires and reliability in series firing
Well, we always start with a 'good idea', then comes a lot of rigorous testing to ensure it really i ...
5-3-2018 at 15:09
by: Twospoons
Electric matches, uniform resistance of bridge wires and reliability in series firing
Adding a shorting link to a capacitor is a simple matter. Simpler than handling ematches made from r ...
5-3-2018 at 14:33
by: Twospoons
Electric matches, uniform resistance of bridge wires and reliability in series firing
Thanks for the explanation Bert. Those reasons all make perfect sense.
I can see another way to h ...
5-3-2018 at 12:49
by: Twospoons
Electric matches, uniform resistance of bridge wires and reliability in series firing
You would have thought the simplest method would be resistance binning i.e. grading into 2% bin step ...
4-3-2018 at 21:19
by: Twospoons
Jet Bike
[rquote=508226&tid=80671&author=ecos]I had a look on the basic design of diesel and petrol e ...
22-2-2018 at 13:00
by: Twospoons
Jet Bike
"Turboshaft". Thats the term I was looking for.
21-2-2018 at 14:41
by: Twospoons
Jet Bike
The other way is to build a turbine based on a used truck exhaust turbo - plenty of internet resourc ...
21-2-2018 at 13:28
by: Twospoons
Slow high torque electric motors for stirrer?
I still find it surprising that one motor runs but another does not, with the same driver circuit. T ...
13-2-2018 at 13:14
by: Twospoons
Slow high torque electric motors for stirrer?
Pretty much any digital meter should be capable of 0.1 ohm resolution, on a 100 ohm fullscale settin ...
11-2-2018 at 15:32
by: Twospoons
Slow high torque electric motors for stirrer?
You really need to get a better meter. Or possibly replace the battery in your current one?

You ...
9-2-2018 at 17:12
by: Twospoons
Slow high torque electric motors for stirrer?
If the motor is locked but not rotating I'd guess one phase is not connected properly.
9-2-2018 at 13:22
by: Twospoons
Slow high torque electric motors for stirrer?
Given the price of that module, it is entirely possible they don't test at the factory - just replac ...
8-2-2018 at 14:56
by: Twospoons
Please replace your passwords-
Given that most people have a vocabulary of about 5000 words they use regularly, choosing four words ...
8-2-2018 at 12:27
by: Twospoons
Slow high torque electric motors for stirrer?
Certainly starting to look like its the driver thats busted. Odd - those things are usually fairly ...
6-2-2018 at 17:13
by: Twospoons
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