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Winding flyback secondary?
[rquote=521220&tid=83533&author=Foeskes]Any tips on insulating the layers?
I tested the old ... |
11-6-2018 at 13:34
by: Twospoons |
Robo challenge event: 2D pattern matching needed
OK, giving away all my secrets now 
How about a passive beacon with an active camera?
The bea ... |
1-6-2018 at 15:56
by: Twospoons |
lightning storms
[rquote=520193&tid=83522&author=Vomaturge]But I really don't see how 10-30kV would make such ... |
1-6-2018 at 15:19
by: Twospoons |
Robo challenge event: 2D pattern matching needed
If you do go this route its important to take the two images an integer number of mains cycles apart ... |
31-5-2018 at 18:22
by: Twospoons |
Robo challenge event: 2D pattern matching needed
Are you designing the beacon? If so perhaps you could make it flash - then you could use image subtr ... |
31-5-2018 at 14:29
by: Twospoons |
Propane tank in full sunlight: dangerous ?
from: http://www.elgas.com.au/blog/1969-how-much-pressure-is-in-lpg-propane-cylinders-in-what-state
... |
27-5-2018 at 13:51
by: Twospoons |
Making invisible markings on paper (needs to be not commonly known or easily seen)
Would you go as far as radio isotopes? That could be revealed by photographic paper placed adjacent ... |
21-5-2018 at 00:58
by: Twospoons |
Mixing Thermoplastics, Equipment and Chemistry?
How about making a cutter to sit at the end of your extruder, turning filament back into pellets. Th ... |
20-5-2018 at 13:00
by: Twospoons |
Cool electronic devices you can make for thr lab but are uncommon.
And epoxy has a higher expansion coefficient than either aluminium or ceramic, by a factor of two.
... |
14-5-2018 at 13:17
by: Twospoons |
Cool electronic devices you can make for thr lab but are uncommon.
[rquote=517446&tid=82665&author=coppercone][rquote=517420&tid=82665&author=Ubya]1kW ... |
11-5-2018 at 12:35
by: Twospoons |
Hot air balloons- What is % O2 inside the envelope?
If you use an electric heater to fill the balloon, then the answer is clearly 21%. I have no idea h ... |
8-5-2018 at 14:14
by: Twospoons |
Only Half Human
Makes me wonder if we exist for the bacteria's benefit, rather than them for ours. As if we are noth ... |
12-4-2018 at 15:25
by: Twospoons |
Where does heat go in a battery?
No thats not the vertical label, thats the chart title. Google sheets isn't a great tool sometimes.
... |
10-4-2018 at 13:46
by: Twospoons |
Where does heat go in a battery?
Ok, so consider a hypothetical battery of 12V, with an internal resistance of 100 ohms, modeled belo ... |
10-4-2018 at 13:28
by: Twospoons |
What is stronger? Sunlight or artificial light?
Just for fun I thought I'd work out the power flow from a "cooking pot" at 4000C, assuming an emiss ... |
8-4-2018 at 23:14
by: Twospoons |
Fisher Accumet IC (transistor?) replacement?
The NTE960 should work for you. Its pin compatible with the 7805. The other one wont - it needs a co ... |
6-4-2018 at 22:14
by: Twospoons |
Robotics - building an dual axis (X,Y) camera mount
I'd go steppers with a microstepping driver, then you only need a home switch instead of encoders. ... |
6-4-2018 at 22:07
by: Twospoons |
Fisher Accumet IC (transistor?) replacement?
[rquote=513260&tid=81762&author=PiledhigherandDeeper]
Best I can tell is the middle pin con ... |
5-4-2018 at 20:56
by: Twospoons |
Fisher Accumet IC (transistor?) replacement?
Educated guess is its a 7805 regulator chip, based on the partial part number, and the connections I ... |
5-4-2018 at 18:49
by: Twospoons |
Analog hotplate: no more rythmic light dimming?
Use LED lighting. Or compact fluoros.
The control circuitry in either one will maintain constant l ... |
3-4-2018 at 14:17
by: Twospoons |
Making an acrylic büchner funnel
[rquote=512902&tid=81589&author=DrP]Are these acrylics and PLAs solvent resistant? [/rquote ... |
3-4-2018 at 14:04
by: Twospoons |
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 |
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