kai.h's instructables
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- kai.h followed diyhuntress
- kai.h commented on 1alembic's instructable Plywood Power Carved Wall Art
- kai.h commented on Stevens Workshop's instructable Deep Hole in a Small Box, a Different Take on the Infinity Mirror.View Instructable »
This is awesome, and I want to build it for myself.One thing that could make the illusion even more convincing would be to use a first surface mirror for the base. These are mirrors where the reflective surface is on the front of the glass, not on the back. They are a lot more delicate, but as it would be enclosed in a box, that shouldn't be a problem. This would then make the "join" in the ladder less noticeable.https://en.wikipedia.org/wiki/First_surface_mirror
- kai.h commented on Fall-Apart-Dave's instructable Chassis Restoration on a Volkswagen Beetle VolksrodView Instructable »
Nice. Makes me think of a classic Ministry song...Jesus built my carIt's a love affairMainly Jesus and my hot rod
- kai.h commented on dariocose's instructable Rotellino - 3€ Battery Free Contactless Bike LightView Instructable »
It looks like an aluminium rim in the picture - being more of a matte silver texture. Steel rims are usually chrome plated to prevent rust so are a shiny chromed silver texture instead. If it were magnetic attraction, then a magnet would be attracted to the rim, and stay there - whereas the eddy currents "drag" the magnets along in the direction of rotation, leading to the dynamo spinning.
- kai.h commented on DIY KING 00's instructable DIY Magnetic Drill PressView Instructable »
Yes, making your own magnetic chuck would likely be quite difficult.Using magnetic chucks however, it is pretty straightforward to place items accurately on them. You place the item when there is no magnetism in the chuck. Then, as you turn the lever, the magnetism is slowly turned on and the item stays where it is. I'd imagine it would be the same if you used a magnetic chuck to locate a mag drill on a solid piece of steel.
- kai.h commented on DIY KING 00's instructable DIY Magnetic Drill PressView Instructable »
It would be interesting to see if you could adapt a Magnetic Chuck to hold the drill onto the surface. Through a clever arrangement of permanent magnets, and a lever, the magnetism can be turned on or off at will - and it doesn't use any power to hold in place.https://en.wikipedia.org/wiki/Chuck_(engineering)#... https://en.wikipedia.org/wiki/Magnetic_switchable_...They are like black magic - being able to switch permanent magnets on and off at will!
- kai.h commented on hockeyidiot's instructable Water Wheel Sea GlassView Instructable »
Bundy. Best Ginger Beer ^_^
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
You should be able to keep the oven on a low temperature, like 50° - the controller learns how quickly the oven heats up when the element is on, so it should be able to keep it pretty stable at any temperature, in theory...
- kai.h commented on lizbethcarr's instructable How to Make Homemade MochiView Instructable »
I read that as: Use one cup sugar, _or_ if you don't want it too sweet, use half a cup of sugar instead.
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
I don't think the toaster oven will hold temperatures of 300°C.I can't give you any more information about the build than what I've published here - this instructable is my full documentation and tutorial for the build.
- kai.h commented on In The Kitchen With Matt's instructable Easy Soft Flour TortillasView Instructable »
I'm with you on paper towels. I live in Australia, I've never seen dyed paper towels, they're all white here - so there's no issue about the dyes they use. As for the issue of bleach - ALL white paper has been bleached during production, including cardboard, wrappers, paper towels, serviettes, etc. The bleach is removed from the paper fibres long before it becomes a finished item.If paper towels were as toxic as some claim, then there would be warnings on the packaging.
- kai.h followed Phil Mercurio
- kai.h commented on kai.h's instructable PID Temperature Controlled Oven
I don't know if the oven would even reach 500 degrees, particularly with a glass door that will let a fair bit of heat out.
View Instructable »Sorry mate, I really don't know if it will work or not.
- kai.h followed amiedoubleD
- kai.h commented on Georg Lavoie's instructable Porcelain Salt and Pepper Ray-gunsView Instructable »
Great Instructable.You have your units wrong for the measurements in Step 4. Instead of mg (which is milligrams, and there are 1,000 mg to a gram) it should be perhaps gm (or, just g). 2 cups of water is 500 g is 17 1/2 ounces. 685 g of plaster is 24 oz.
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
Hi Col68,I can't really offer any helpful advice on that particular unit - I've not encountered it before, so I don't know if it will work or not. If it's a PID for controlling temperature, you should be able to work it in by following the instructions you got with the PID controller and seeing if you can match up the connections as per my example. If you are at all unsure however, please speak to someone who can offer you professional advice as you are working with mains voltage electricity and it is quite dangerous if you don't know what you are doing.
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
It would be difficult, but I'm sure you could do it. You would need the temperature sensor attached to the metal base plate and then somehow wire it up so that the output from the PID turns the hot air gun on and off. I would recommend seeking professional help when working with mains voltages though.
- kai.h made the instructable Gorgeous and Warm: Hooded Capes & Cloaks!View Instructable »
Thank you for the clear and easy-to-follow instructions. As the panels for the cloak were simple shapes with straight edges, it was easy to work out how to scale it up or down as required. I made a cloak for my daughter who wanted to dress up as Raven from Teen Titans. I modified the hood from your design by using one of her hoodies for the basic shape and then adding the peak in the middle. The cloak was made from a synthetic material with a black cotton lining in the hood.
- kai.h commented on mikeasaurus's instructable 5 Ways to Remove a Stripped Screw
The name you're searching for is Tri-Wing. They're quite common as a "tamperproof" screw in electronics and most electronics driver kits will have a couple of bits. I think Nintendo are quite fond of them.Tri-Wing Screwdriver
View Instructable »I've had limited success with the screw extractors pictures - the ones that I've used more reliably look like a torx bit. Drill an undersized hole into the top of the fastener and then pound one of these in with a hammer and it usually backs out really easily. In a pinch, if you have a well hardened torx bit, but no extractors, they'd work as well.They look something like this:https://www.amazon.com/Lisle-62110-4-Piece-Stripped-Extractor/dp/B0093N68TW
- kai.h commented on mtairymd's instructable Rope PuzzleView Instructable »
If you're looking for a good knot that will hold well on synthetic cords and ropes, try a Figure of Eight knothttps://en.wikipedia.org/wiki/Figure-eight_knotOnce you get the hang of it, it's no more difficult than a simple overhand hitch.
- kai.h commented on kai.h's instructable 30 Second Zipper RepairView Instructable »
The heatshrink works pretty quickly - I was careful to hold the zipper pull vertically away from the fabric and angled the heat gun away from the fabric itself. I only needed a few seconds to heat the heatshrink enough for it to shrink down and mould onto the paperclip. Nowhere near enough heat hit the fabric to do any damage.
- kai.h followed John deCaux
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
No, I don't think it will go hot enough. I think this oven would struggle to hold a temperature much over 200° - 220°. For pyrolysis I think you need temperatures up around 300°
- kai.h commented on Itsatrav's instructable The Tower Box (Dice Case)View Instructable »
Looks good. One thing you can do to really smooth out the rough cut edges on the perspex is to flame polish it.Here's an instructable that someone has done that shows the technique.https://www.instructables.com/Flame-Polishing-acrylic/
- kai.h's instructable Quick and Easy Limoncello 's weekly stats:
- kai.h entered Quick and Easy Limoncello in the Gluten Free Challenge 2017 contest
- kai.h commented on Paige Russell's instructable 10 Unusual Uses for LemonsView Instructable »
What timing. I just put up a recipe yesterday!https://www.instructables.com/Quick-and-Easy-Limoncello/
- kai.h commented on kai.h's instructable Quick and Easy LimoncelloView Instructable »
Спасибо!(at least I hope that says Thanks!)
- kai.h commented on Desktop Makes's instructable The Easy Way to Design Gears in Fusion 360View Instructable »
Great tip - why re-invent the wheel each time you need a gear. Plus if you're using standard sized parts in your model, you can either use 3D printed or off the shelf components depending on your requirements.
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
Thank you for your concern. This is not intended to be used unattended in an industrial environment, but in a workshop where you can keep an eye on it. If the thermocouple (which I've now replaced with a PT100 sensor) reads room temperature while it's in operation, then this is a pretty good indication that something is wrong.
- kai.h commented on bartroosen's instructable New Powerful 1800W Electric Longboard
- kai.h commented on trf's instructable How to Remove a Stuborn Nut/boltView Instructable »
I've recently needed to remove a bolt that had sheared off inside a recessed area - I tried the bolt extractors that you have pictured (which I've successfully used in the past) but they couldn't get enough grip to back it out (thanks to whoever thought some locktite would be the solution last time they put it back together). A mechanic mate saw the strife we were in and had a different set of extractors that worked amazingly well. They looked more like torx driver bits (and made from super hardened tool steel). The idea is you drill a hole that's a bit too small for them to fit and then hammer them in. This gives you plenty of purchase to then back out the broken bolt.
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
I'm don't think that there's a 12V output on the PID.It takes in 110-240V to power itself, and it must convert that down to 12V or 5V internally, but I can't see any outputs on it that supply 12V to an external device.You'll need to get a mains to 12V power adapter and wire it in parallel with the power input lines to the PID.
- kai.h commented on kai.h's instructable PID Temperature Controlled Oven
The PID and SSR completely replaced the original thermostat. There were two wires going into the thermostat, and the thermostat clicked to turn them on or off (join them or separate them).These two wires from the thermostat went instead into the SSR. In the photo I had, the OUTPUT from the PID went to the INPUT lines on the SSR.The wires that previously went through the old thermostat instead connected to 1 and 2 on the SSR.If you connected both wires from the thermostat to a single terminal on the SSR, this effectively joins them together, so takes the SSR out of the equation and the oven would be permanently switched on.
View Instructable »I ran the output from the PID to the input on the SSR.The SSR was then put in-line with the power to the heating element.The PID and SSR completely replaced the original thermostat. There were two wires going into the thermostat, and the thermostat clicked to turn them on or off (join them or separate them).These two wires from the thermostat went instead into the SSR. In the photo I had, the OUTPUT from the PID went to the INPUT lines on the SSR. The wires that previously went through the old thermostat instead connected to 1 and 2 on the SSR.
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
The PID I used doesn't have a timer. This modification retains the original timer for the oven, however it only goes up to 90 minutes or something like that.There are many digital timers that could replace the timer dial quite easily. Inkbird have a timer module that's on Amazon (but strangely not on their website)https://www.amazon.com/Inkbird-Digital-Switch-110-220V-IDT-E2RH/dp/B008KV65MSIf you were to cut out the dial for the timer and install this module below the PID, you could then route the 110 or 240V mains through the timer module and have greater control over the timing of the unit.
- kai.h's entry PID Temperature Controlled Oven is a winner in the Sensors Contest 2017 contest
- kai.h's entry PID Temperature Controlled Oven is a finalist in the Sensors Contest 2017 contest
- kai.h commented on KarenK116's instructable Campfire Biscuit Treat SticksView Instructable »
These look delicious - they're very similar to a traditional Australian bread called Damper. Damper is generally made from a flour and water dough, and you can use baking powder (or SR flour) if you want it to rise.You can make a big damper by forming the dough into a cob and bake it directly in the hot coals of a campfire (breaking off the charred outside crust to eat the soft interior) or wrap the dough around the end of a stick and cook it in a fire like this.We used to make damper over the campfire on the ends of sticks whenever we went camping - the dough is very easy to make and when it's cooked, you can put all sorts of things down the middle (butter and golden syrup or honey was a favourite!)https://en.wikipedia.org/wiki/Damper_(food)
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
Thanks for the update. I've got a PT100 sensor on order, I figure that if it's made to spec so it is 100Ω at 0°C then it should be much more of a known quantity than the thermocouple I have. I'm concerned that with the thermocouple I have that something isn't right having to put in such a huge offset (more than -70°C)
- kai.h commented on kai.h's instructable PID Temperature Controlled OvenView Instructable »
Awesome work! That looks mint. Good to see that the temperature is spot on according to three different sources too.What temperature probe are you using with the PID? The Type K? What temperature offset did you need to program in for it?Glad my instructions helped in getting the PID set up correctly - the instructions are pretty confusing.
- kai.h commented on MrFixItDIY's instructable DIY Cheese Slicer BoardView Instructable »
Yes, but where's the fun in that? ^_^
- kai.h's instructable PID Temperature Controlled Oven's weekly stats:
- kai.h commented on kai.h's instructable PID Temperature Controlled Oven
If you want to make a super-deluxe reflow oven, you'll want a slightly more advanced PID controller - one that adds timing to it.It's my understanding that for reflow, you need to heat up at a certain rate, hold it at a particular temperature and then let it cool at a certain rate as well. A more advanced PID will allow you to program in all these ramps automatically, whereas with my version you'd need to monitor it yourself.
View Instructable »Pretty much this. Insulation has to resist heat and trap a large amount of air within it's mass. Most, if not all, materials that have these properties are not good to breathe as they're fine mineral fibres - Asbestos is a naturally occurring insulation fibre. Synthetic insulation is not as bad for you as asbestos, but you still don't want to get it into your lungs as the fibres can become lodged in there, build up over time and cause health issues much later down the track.
- kai.h commented on kai.h's instructable PID Temperature Controlled Oven
Yeah, there are probably a few other alternatives, but I had some of this stuff on hand, it's totally non-flammable and is rated at temperatures up to at least 1000°C, so it doesn't matter that it's directly in contact with the ends of the heating elements. If I was buying some materials directly to do this project, I probably would have got some rockwool or something similar to that. Isowool is easer to work with for this application as it's in thinner sheets (~20mm thick or so) whereas rockwool is designed for home insulation so comes in much thicker batts.
The oven had a thermostat that went up to 240°C.For tempering metals, this is about perfect. 230°C is ≈ 450°F. If you're tempering any higher than this, you're losing a lot of hardness.I've got a piezo buzzer on the way that I'll wire up to the alarm outputs of the controller and set the high temperature alarm at something like 250°C
I wasn't sure about that - whether or not a large initial error away from 0°C was an issue or not.Despite this large offset, it does seem to be pretty much spot-on for 0°C and 100°C.The eBay listing definitely said it was a Type K thermocouple. According to Wikipedia, red and blue are sometimes used for Type K, whereas it's red and purple for Type T.This is the first (and so far only) thermocouple I've had to calibrate an offset for, I have no prior experience with these devices.I've ordered a PT100 sensor and am waiting for it to come in from overseas, the only thing is that taking the oven apart and putting it back together again is a right royal PITA. What I now plan to do now is run a few spot checks at different temperatures and check with an IR thermometer or something e…
see more »View Instructable »I got over to the workshop today and installed the insulation. It was pretty fiddly, but on the right side, you can see how I cut some slots for the heating elements to fit into and it all holds in place very well.https://www.instructables.com/PID-Temperature-Controlled-Oven/step12/Add-Insulation/
- kai.h commented on kai.h's instructable PID Temperature Controlled Oven
Cheers!
Thanks!
Thanks!
View Instructable »Yes, you're right (according to Wikipedia) - SSRs tend to fail closed whereas mechanical relays tend to fail open.The Inkbird PID does have a high temp alarm (and a low temp alarm too) - I might have to look into hooking it up to a buzzer to the alarm outputs.Temperature regulation with a failed SSR will be more critical when the oven is insulated as the temperature will be retained more than with the factory configuration of just an air gap for insulation.
- kai.h entered PID Temperature Controlled Oven in the Sensors Contest 2017 contest
- kai.h entered PID Temperature Controlled Oven in the Trash to Treasure Contest 2017 contest
- kai.h commented on JON-A-TRON's instructable 3D CNC Relief Sculpture - Fusion 360View Instructable »
I think I got there in the end - although my mesh seems to extend over the edges of the block on two sides...
- kai.h favorited Rock Tumbler by Blueloop
This is really nice. Here I was expecting the instructable to be something along the line of Get some plywood, load it into your handy CNC and let 'er rip. What, doesn't everyone have a CNC?I don't have a CNC and appreciate guides like this that I can actually follow.