steveastrouk

This is very usefulhttps://www.instructables.com/id/Test-your-materia...TL:DR Do your own tests, and record the results. A lot depends on your laser tube, and its current temperature and age.

Can you measure your running current and voltage ? I'd try your experiment again, and see what they are doing when they are red hot. You MIGHT be able to run them on a higher voltage, and put them in series.

Its a great find, but probably impractical to run on a home electric service.

This is a very high temperature unit, with Silicon carbide heaters - designed for longservice and high temperature operation. Unlike metal heaters, they won't fail after a time. They are unfortunately evil buggers to run, because they are non-linear resistors, and have a very low cold resistance which increases rapidly with temperature. I'll guess at the very least it was designed for three phase power, because that's what you do with them, and you switch the elements around from series to parallel as things heat up. KANTHAL are one of the big suppliers of these elements, and they have some great books on how to control and use them

Many years ago, I converted a "drying room" in my climbing club's facility in very wet North Wales from a system that took a pound an hour to run, and not dry clothes, into one that cost less than 0.1 pounds per hour - and gave dry clothes. I bought a BIG industrial dehumidifer, capable of over 3 gallons per hour removal rates, put it one end of the room, then fitted large ceiling fans and blowers to really stir the air up. So, yes, its very feasible.

They filter high frequency noise from the regulator, their values are given in recommended values by the manufacturer. 0.1uf can only really practically be a ceramic or polyester component.

What ever the LED takes + a few microamps for the regulator.

Cylinder mower engines which are popular in Aus and the UK are horizontal shaft motors.

You didn't look at the bloody link did you ?

There's a camera project on Cloudy Nights using the NOIR camera.

The battery acts like a very large capacitor, since, however much charge you remove from it, the voltage on its terminals stays the same. Likewise, it has a low series resistance, because when you draw the load charge, the terminal voltage doesn't change then either.

Applyimg Kirchoff's laws to the solution of circuit theory questions can be confusing. The currents are virtual, a mathematical fiction. which sum to the measured currents experience in the circuit.

https://openbuilds.com/builds/build-2-bigger-stronger.5402/

You can export from Sketchup to DXF. Here's a copy of the file

Hi Linda, Subsequent to this post (from five years ago), and mum passing away, we ended up emigrating to the USA ourselves. Where did you buy "English Flour" ?

Ah, looks like you need his library FROM the link you cite, and then the program files which are in the link here https://cdn.instructables.com/ORIG/FDE/YM4J/IIDH9Y98/FDEYM4JIIDH9Y98.rar

Sorry, the R is 100 Ohms, the C is 100nF or 0.1 uF, its a noise filter, you could even leave it out

I think this old drawing in my library shows it done with relays, its better than routing large currents through switches.

Here's an old circuit that I did that uses relays.

Its not a capacitor, its a noise suppression network I suspect.

Cyclonics are GREAT at taking out big lumps of stuff, like woodshavings, not so great at fine dust. What sort of stuff are you sucking up ?

Poly doesn't wet out carbon fibre properly.

You need to try people like Newark electronics.

Divide mm by 25.4, or learn to work in different units....

The material that fills the gaps BETWEEN pieces of tile.

Look at the schematic. The motor sees battery volts, minus whatever is dropped in the transistors, which depends on what current the motors pull. If you increase the battery volts, you should put a proper regulator onto the wifi module, or you will destroy it.

WIPER !!!

Clearly asking the author of an Instructable which was posted 4 years ago isn't working.....Connect the +ve input of the opamp to ground, or, better, a potential divide who's output voltage is slightly less than the output of your film, connect the -ve input to your piezo film. Connect the output of your single-supply opamp to your load.

Kind of. Alumnium is very soft though, and its easy to gouge. There is no known toxicity issue with aluminium oxide.

"Self cleaning mode" is a mode in many electric ovens where the oven can get to an unusually high temperature to burn off carbon. An "SOS pad" is a scouring pad from cleaning ovenware. They can be made of metal wires, or a material called ScotchBrite. Crisco is a kind of vegetable oil, often made with Canola or Corn. Flax oil is considered the best oil to season with.

Yes, I recommend my Home Depot one.

VERY nicely documented.

No, you are making near net shapes by casting, the time to machine the final details is a LOT less than the cost of milling the fins for example.

Because the poster is French ?

Sounds like a line-following machine to me.

Yes, you can, you'll have to be careful to get them phased properly, or you'll not see the output volts you expect. If the transformers are from the same maker they will both start and stop on the same pins. Most transformers are marked 0V and (phase) V, connect one transfomer's 0V to the OTHER transformers phase volts, thats the 0V reference for your DC supply- and put your diodes on the other two pins.

Maybe that's the idea - you have to do it yourself. 2 wheels though. Does it have to be like a motorcycle, or a Segway ?

Cire Fondu, which is a non-silicate based concrete can be used for refractory forms. Some people have melted glass onto thin-set mortar

Where are you in the world ? I have a very nice, all-metal Home Depot one, for stuff up to 12 inches

You cut it from a bigger piece

You know, sometimes you have to actually do some work yourself. The author GAVE you the circuit diagram and the Gerber files for the PCB !!

Yes.

Stacking software corrects the position of the stars, by shifting the frame on each exposure

Its an oscillator, modelled on a Hartley circuit. Try an Ebers-Moll equivalent circuit, in a small signal simulation

Carefully squirt "GoodStuff" foam under it. Better still, put the foam in a garbage bag under the tub, so someday someone can remove the tub

You have to have root access to change the required hardware file definitions.

A whole $10 for lifetime use ?

You talk about current transformers, but illustrate a Rogowski coil. Which is used ? Do you mean a real CT, or a hallsensing CT ? If you use a real CT, then you need the usual warnings.

The blocking oscillator itself does not create a sine wave, it is a square wave, however the load acts as a filter, and the higher end components of the square wave are filtered out, leaving the fundamental.

I have a drill Doctor too. You have to be very careful to keep the chuck up to that index peg, and you really DO need to turn it a LOT on big drills to get the geometry right. And if the drill is really buggered up, you need to set it more than once in the alignment fixture. Steve

We used to use Trefolex, and then I was persuaded to use Rocol RTD and never went back !For aluminium, we use a mixture of Kero and mineral oil.

I'd like to see pictures of just what you mean here. I kind of see it, but want to be sure

Your 5V1 and 5V2 rails aren't, are they ? You mean isolated 5V rail 1 and isolated 5V rail 2Saying 5V1 means 5.1V, 5V2 means 5.2 V

Nice 'Ible guys. Steve from Ravenfield

Divide litres by 3.8 to give US gallons,

What a great demo of Blynk. I think you've convinced me to try it for myself for a hydroponic app.

Still needs finishing - the project I bought it for collapsed, so there was no pressing need.

No 3d print I know of will take the forces you need to apply to the spokeshave without bending too badly to work. There are thin sections around the blade area. Wood is much better material.

You should make sure Lee Valley get a link to this here. Its better than their instructions. I used a CNC mill to make mine !

Gone, but not forgotten, like his friend Bob Pease.

A very brave project to start, and an amazing result when finished. People who will rewind these small motors are getting very hard to find, so this is a great Instructable, and I've favourited it.

Stunning result. Superb instructable. What a gorgeous piece of work.

What does it WEIGH !!Amazing project. What a beast of a machine. I'm looking to build myself something very similar, Plasma/router/laser heads, and with BLDC servo drives.

Good to see an old technique permanently recorded.

Brilliant 'Ible !! Love the introduction. :-)Nicely detailed, and the pictures are great.