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23Instructables108,729Views442CommentsUnited KingdomJoined February 17th, 2009
Software geek, electronics enthusiast, musician, artist ... I enjoy making stuff, and discovering new things!

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  • MikB commented on waylightcreate's instructable Over the Sink Cutting Board1 week ago
    Over the Sink Cutting Board

    I use mineral oil + beeswax -- if you look on Instructables I'm sure you'll find multiple home-made recipes.

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  • MikB commented on kylegilbert's instructable A Quick Method for Peeling Cardboard2 weeks ago
    A Quick Method for Peeling Cardboard

    ... or for arty reasons, such as ...https://www.instructables.com/id/Game-of-Thrones-C...https://www.instructables.com/id/Simple-Cardboard-Art/

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  • DIY Industrial Beam Chandelier With LED Edison Bulbs

    https://en.wikipedia.org/wiki/The_Borrowers

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  • MikB commented on JokerDAS's instructable Hide Your Thumb Drive in Plain Sight1 month ago
    Hide Your Thumb Drive in Plain Sight

    It's alright saying "make sure you do not plug in this charger". What about anybody else that finds it? Unless you mark it as "Secret hiding place, do not use, danger of death!" :)Seriously: If you are going to build this, make sure any wires leading from the prongs are removed, and insulate the whole of the base of it inside with plastic, paxolin, or other resilient insulating material, cut to fit the whole space and glued in. That way the situation never arises.Now your only problem is somebody finding it, realising it's broken, and binning it :)

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  • Simplest 12V to 220V DC to AC Power Inverter DIY

    More "buzzing" than clicking. Every time the relay energises, it almost immediately cuts off its own coil's power and switches back off. Repeat. Rapidly! The transformer shares that interrupted power.This is why you use the "Normally closed" (NC) contacts on the relay.Disclaimer: The relay will eventually die, as you are working it very hard.

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  • MikB commented on KaiPalmer's instructable Hidden Home Key1 month ago
    Hidden Home Key

    One word. Squirrels.Round here, pine cones on the floor get dragged off and/or nibbled to a stump :)

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  • DIY Industrial Beam Chandelier With LED Edison Bulbs

    A 7 inch ceiling? Who were the original owners, The Borrowers? :)Now that's what I call a dropped ceiling!

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  • MikB commented on Medic55's instructable Epoxy Resin Dining Room Table 2 months ago
    Epoxy Resin Dining Room Table

    Looks great, but I get a sense of deja vu reading the step by step instructions :)Did you have a cut and paste accident?

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  • Board Butter!  for Conditioning Your Wooden Cutting Boards and Utensils

    Also, if the chopping board has a dinged-up surface, it's a good idea to give it a good sand across the face to cut back into fresh wood, before cleaning all the dust off, then waxing it. I used a B&D "Mouse" detail sander for this :)The original factory-finish was some kind of varnish/coating which was starting to peel and flake away.Additionally, I found that putting the chopping board under a grill (low light!) warms the wood up nicely so that the beeswax-oil mixture melts and flows across the surface better.It definitely makes it easier to clean and dry the chopping board when it can't absorb water.

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  • MikB commented on DIY KING 00's instructable The Classic Wall Clock3 months ago
    The Classic Wall Clock

    Just thinking aloud here: Normally you would try and hide or avoid knots in the wood in a woodwork project. But: I think this is one of those times where planning the blocks so that a knot falls EXACTLY on the centreline of 4 of the blocks would be really cool, to mark the 12-3-6-9 points!

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  • How to Make a Regular Board Look Live Edge

    Have you considered/tried staining the cut edge a much darker colour, to imitate a bark outer? Maybe the edge plus a masked-off band of 1/4" onto the face too (approximately following the line of the cut edge).

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  • MikB commented on kooler's instructable New Life for Old Tables3 months ago
    New Life for Old Tables

    A massive improvement on the original tables! Nice job!

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  • MikB commented on teamlighthouse's instructable Fix Your Broken Headphone Jack3 months ago
    Fix Your Broken Headphone Jack

    Always remembering to put the plastic cover-strain relief onto the cable BEFORE soldering the end on ...And making sure it faces the right way ...Don't ask me how I know these ! :)

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  • Build Your Own Surveillance Camera With Raspberry Pi and Motioneye

    Sounds like the RJ45/USB are passive devices: Look for ACTIVE (powered) USB extenders: these can get you further. You can even chain them together, up to the point where it stops working :)

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  • MikB commented on tomatoskins's instructable Impossible Tape4 months ago
    Impossible Tape

    Ingenious! Did not see that solution coming at all :)

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  • Covering Up a Very Ugly Ceiling With Styrofoam Ceiling Tiles

    Valid point -- but "read the labels" is bad advice if you believe that manufacturers "will sell anything". Do as I said and TEST a piece of the insulation and see if you can set fire to it. Outdoors.

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  • MikB commented on CADnoob's instructable Mother's Day Gift - Stained Glass (faux)4 months ago
    Mother's Day Gift - Stained Glass (faux)

    Done ... fuller writeup now available athttps://www.instructables.com/id/Backlit-Faux-Stained-Glass-Picture

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  • MikB commented on JunezRiyaz's instructable How to Make 12V DC to 220V AC Inverter4 months ago
    How to Make 12V DC to 220V AC Inverter

    +1 on the MOSFETS, but also maybe a fuse in line with the 12v supply, for that day when both transistors/MOSFETS turn on at once (failed BC547 or one of the main ones goes short circuit) :(Otherwise "Bang good" won't just be a company to buy the bits from ! :)

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  • MikB commented on JunezRiyaz's instructable How to Make 1.5V DC to 220V AC Inverter5 months ago
    How to Make 1.5V DC to 220V AC Inverter

    Not to diss the original circuit -- but "I wouldn't start from here" :) It's like a "Joule Thief" on steroids, and with AC output. Very simple, ingenious idea, and no doubt works for some things (like a CFL), but it's a real struggle to raise 1.5v to 220v at meaningful current.There are many designs for inverters and UPS style circuits on the net, many have been posted on Instructables.Good starting points for a beefier unit: Runs on 12v or 24v. Frequency controlled at 50Hz. Output voltage regulated, even loosely, to 210-250v range. That takes more parts :)I'd still like to know what the output voltage of the above circuit really is, measured, off and on load.

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  • MikB commented on JunezRiyaz's instructable How to Make 1.5V DC to 220V AC Inverter5 months ago
    How to Make 1.5V DC to 220V AC Inverter

    If by "excessive" you mean at least 146 times the output current, then yes :)1.5v is a really low starting point for getting mains voltage.Often a 220v/9v transformer will be driven with up-to-12v to get 220V out, because of losses.So - 220v/6v transformer is probably not going to produce 220v when driven with 1.5v, the sums don't add up, so can you measure the output voltage and see what you are actually producing? It may well be enough to tickle a CFL bulb into life, but not for more critical loads.

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  • MikB's entry Frames Made With Flames! is a winner in the Fire Challenge 2017 contest 5 months ago
  • Covering Up a Very Ugly Ceiling With Styrofoam Ceiling Tiles

    If they are modern tiles, they will have a fire retardant to prevent them becoming such a hazard. It's the old 1970's styrofoam (polystyrene) tiles that are the nightmare: Flammable, toxic black smoke, dripping melting sticky plastic. Even worse when coated with a layer of oil-based paints!If you have any offcuts of the tiles left, take one OUTSIDE and try and set fire to it. If it refuses to catch on fire, and just crinkles up and self-extinguishes, that's good. Try the same trick with a piece of scrap polystyrene from some non-critical non-firesafe packaging application, and see how horrible it is.

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  • MikB's entry Frames Made With Flames! is a finalist in the Fire Challenge 2017 contest 5 months ago
  • MikB made the instructable Mother's Day Gift - Stained Glass (faux)6 months ago
    Mother's Day Gift - Stained Glass (faux)

    Not having any of the above items to hand, I adapted your idea a little (see pictures) !Glass -> Damaged CD jewel case fronts/backs (The clear bit that loses some critical tiny piece of plastic!)Liquid Lead -> in the left picture, painted directly onto the BACK of the plastic sheet with black acrylic (by brush). In the right picture, a mixture of PVA (white) glue and a few drops of water based black ink, drawn on using a syringe with blunt needle.Glass paint/stain -> in the left picture, colour directly brushed on, and in right picture, due to the nice retaining walls made by the thickness of the PVA glue, flooded each cell with water, and then dabbed/mixed in acrylic paint for zero-brushstrokes. Adding a few drops of washing up liquid helps the water to flow and wet the plasti...

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    Not having any of the above items to hand, I adapted your idea a little (see pictures) !Glass -> Damaged CD jewel case fronts/backs (The clear bit that loses some critical tiny piece of plastic!)Liquid Lead -> in the left picture, painted directly onto the BACK of the plastic sheet with black acrylic (by brush). In the right picture, a mixture of PVA (white) glue and a few drops of water based black ink, drawn on using a syringe with blunt needle.Glass paint/stain -> in the left picture, colour directly brushed on, and in right picture, due to the nice retaining walls made by the thickness of the PVA glue, flooded each cell with water, and then dabbed/mixed in acrylic paint for zero-brushstrokes. Adding a few drops of washing up liquid helps the water to flow and wet the plastic, otherwise it beads up! Let neighbouring colours dry, and have it absolutely horizontal!The original image was placed inside the CD case, in place of the booklet, and marked onto the front of the CD case, and cleaned off at the end with alcohol. Much as you did.Both of these have a 120x125mm square of white paper where the "booklet" would normally go, to act as a light diffuser. They look great when back-lit.I will experiment with this some more :)

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  • MikB commented on MikB's instructable Frames Made With Flames!6 months ago
  • MikB entered Frames Made With Flames! in the Fire Challenge 2017 contest 6 months ago
  • MikB's instructable Simple Framed Watercolour Paintings's weekly stats: 6 months ago
    • Simple Framed Watercolour Paintings
      250 views
      6 favorites
      0 comments
  • MikB made the instructable Bentwood Ring6 months ago
    Bentwood Ring

    Outer: Figured maple, Inner: teak veneer. Both boiled for 20 minutes and curled on a former. Sealed with Cyano, and buffed with a combination of brasso and toothpaste.

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  • MikB commented on siretta's instructable SN76489 Synthesizer6 months ago
    SN76489 Synthesizer

    Am I right in thinking that the SN76489 is a REALLY old chip, 1970's etc, related to the SN76477 sound-effects chip, as used in old MB games (such as Battleships!).If so, that's a fantastic technology gap you just bridged, modern PIC back to the 1970s! :)

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  • MikB commented on vhaa's instructable ProBot - the Protesting Robot7 months ago
    ProBot - the Protesting Robot

    That opening picture is slightly creepy. I don't know why. I just get the feeling that an army of these could turn up in Dr Who or something, trundling relentlessly forward, and they wouldn't be out of place :)

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  • DIY Samsung SmartCam HD Birdhouse Enclosure

    Nice idea ... but please let us know the first time you get a "motion detection" event from a confused bird trying to climb through the lens :)

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  • MikB commented on chrlilje's instructable Balanced Piezo Contact Microphones7 months ago
    Balanced Piezo Contact Microphones

    Yes it is: As shown above, the gold/brass discs are electrically connected to each other as "ground". But when physically mounted, the "white" discs are apparently next to each other. If these touch they will short out the signal.

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  • MikB commented on adachsoft's instructable Hot Wire Foam Cutter - Arduino PWM7 months ago
    Hot Wire Foam Cutter - Arduino PWM

    Using a pot "in line" with a heater/bulb/motor etc. rarely works out well. The currents involved will burn the pot up. Pots (carbon track and similar) are intended for low current and signal levels. If you mean something out of a museum, such as a rheostat, or a giant wirewound pot, then maybe. But it's still an inefficient way to do it.I control the temperature on my hot wire cutter by just turning the voltage up and down at the variable power supply :)

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  • MikB commented on HaHaBird's instructable The Abacus Bracelet7 months ago
    The Abacus Bracelet

    If you soak the veneer/boil it to make it flexible and springy, it SHOULD retain most of its shape if left to cool/dry. But the real trick is once you start gluing the layers together. The more layers you add, the less spring back you will get.

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  • MikB made the instructable The Abacus Bracelet7 months ago
    The Abacus Bracelet

    What a cool bracelet! I actually DID mount an 80's style calculator watch on a bracelet just like this! :) The original strap broke, as they always do, and worse, one of the legs on the watch is damaged so the strap can't be replaced.I used a technique similar to yours, no "form" though, just clamped to a flat piece of wood (for the flat under the watch), and then bent back into shape and clamped with a mini clamp. Teak/Ash/Ash/Ash/Bird's Eye Maple veneers, stained, and finished with superglue (cyanoacrylate) and polished with toothpaste and a dremel mop.For access, there is a hinge, similar to your abacus pins, made with servo wires into dremel-cut slots, and joined with tiny steel wire links. And a clip keeps it closed, by friction/springiness when closed.

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  • MikB commented on MikB's instructable Pinebox: Electronics Design8 months ago
    Pinebox: Electronics Design

    Then you're as crazy as me :)The final schematics/pcb layouts are attached to the end of :-https://www.instructables.com/id/Pinebox-Electroni...As there were some changes made after I got the PCBs produced -- the corrections are in the uploaded files.I recommend you look over all the parts of the project, as the details are distributed over more than 1 instructable ... start from https://www.instructables.com/id/Pinebox-Portable-...

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  • MikB's instructable Cardboard Canvas for Acrylic Paintings's weekly stats: 8 months ago
    • Cardboard Canvas for Acrylic Paintings
      79 views
      1 favorites
      0 comments
  • MikB commented on JonBuilds's instructable Wooden Fidget Cube10 months ago
    Wooden Fidget Cube

    @WannaDuino : I like your unintentional(?) use of "fridget cube" -- this should be the real name for the project, as it is a fidget cube AND a fridge magnet all in one.Especially good if, as pictured, you have a cat with a metal plate in its head :)

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  • Ink jet to wood using rice paper and polyurethane

    Looks like this is a great way to make a cross between decals and decoupage.OK so who's going to volunteer to try this with an (old) laser printer? :)Solves the problem of the poly/brushing lifting the ink, but maybe rice paper (even bonded to an A4 sheet for handling) and the hot roller/fuser won't get on well?

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  • MikB commented on seamster's instructable Impossible Nail in Wooden Block11 months ago
    Impossible Nail in Wooden Block

    As per other comments, using a right-angle mini drill attachment, drill the centre "nail" hole 50% from both sides. It doesn't have to be perfectly aligned, as a nail will not be going through it!

    Seamster's comment was: "First smack didn't do it, but the second much harder one did." -- as long as the wood is securely clamped as shown, it can't really break below the mid-line. Maybe above ...I do think that there's an element of luck, to ensure it breaks in a useful way. You should be aware that the strongest part of a sheet of stamps, or toilet paper, is the perforations :)

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  • MikB commented on fdr1929's instructable Guitar with LED Fretboard!!!11 months ago
    Guitar with LED Fretboard!!!

    Looks great -- Just one question: What steps did you take to make sure that you didn't drill through the truss rod when putting all those holes through the neck :)

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  • MikB commented on wfbatista's instructable How to Fix a Shredded Shoelace11 months ago
    How to Fix a Shredded Shoelace

    True. Don't use superglue though. I tried that once to "crisp up" the end. It got VERY hot and smoked out noxious fumes. Sometimes superglue and fabrics just don't get on well :(

    Aglets: The name of the thingy on the end of a lace that no-one knows :)You can also buy crimpable metal ferrules (another good word) which you could use for this.

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  • MikB commented on asergeeva's instructable How to spread kindness11 months ago
    How to spread kindness

    I have a Hungarian phrasebook -- would that help? It's not entirely accurate ... occasional problems with hovercraft and eels :)

    Nem fogok vásárolni ezt a rekordot. Ez karcos

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  • MikB commented on seamster's instructable Impossible Nail in Wooden Block11 months ago
    Impossible Nail in Wooden Block

    @seamster -- wouldn't THAT be annoying -- if someone found this and managed to get the nail OUT! "That wasn't the puzzle" (!)Of course, you could be a devious sort -- and make two of these. One as per the instructable, and then a second one with just a nail-hole, no wood splitting or gluing, and a loose nail sat next to it. Let people try and remove the nail (it can't be done, don't tell them). Then later swap them over, leaving the nail next to the block. When they find it, mind fried! :)

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  • Use car vacuum, tyre inflater, led etc. at home

    You will need quite a chunky DC adapter to do this. I've got one of those little little compressors, and a 12V/5Amp power supply which "runs" it, but it definitely starts to bog down once the pressure starts building -- due to the voltage dropping. It runs much better on a car battery!A 12v adapter from a modem/router/shaver will probably be killed in quite short order (most are only 800mA-2Amp). Go bigger!

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  • MikB commented on lvdst1's instructable Wall Deco Garden12 months ago
    Wall Deco Garden

    Nice! Looks like a "natural and organic" version of a quadratic diffuser -- although you can't just make a random pleasing pattern of cuts for them :)

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  • How to Start a Fire With a Cell Phone Battery

    Or, just buy a crate of Samsung Galaxy S7's ... They're probably quite readily available second hand right about now. :)

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  • MikB commented on Firebert010's instructable Get the Most out of your Dremel1 year ago
    Get the Most out of your Dremel

    Even better: Try and keep your face out of the plane of the disc in the first place. Be aware that the pieces will mostly fly outward in the flat plane of the disc. Those sanding flat-discs too -- they can unstick from the rubber mount, and I can vouch for them disappearing, whole, at great speeds, when the adhesive fails!

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  • MikB commented on Whodonny 's instructable Rechargeable Bluetooth mannequin speaker1 year ago
    Rechargeable Bluetooth mannequin speaker

    Thankfully you went for a front-ported design :)

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  • MikB commented on smurray2's instructable Old HDD Vibration Table1 year ago
    Old HDD Vibration Table

    Two things: 1) Be aware that some hard drives use metal (aluminium) platters, others use ceramic or glass platters. Cutting chunks out of these are very different tasks. Also, you don't want the ceramic or glass ones to explode, from the vibration!2) Some/most hard drives will NOT spin the main motor for very long if they don't have the head connected, and flying over the disc, and reading the surface. Feedback from the head (servo signals) are used to regulate the position and speed -- no head, no feedback. Spin down.Possibly safer/simpler/more likely to work: Build a scaled up "pager motor" (as used in pagers, cellphones, rumble-controllers on game consoles) -- a DC motor with an eccentric weight on the shaft.

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  • MikB commented on ShakeTheFuture's instructable Make a Melting Spoon1 year ago
    Make a Melting Spoon

    Correct. This is but ONE (mechanical/self working/technological) technique to bend, well, destroy spoons. I doubt Uri Geller had much use for this technique.The best "magic" way to bend spoons is TO JUST BEND THEM. The clever bit is a) how/when to bend it without it being noticed, and b) how to hide the fact that you have already bent it until you want to reveal it, and c) How to convince people things are bending "more" when they really aren't through language tricks.That's the real skill :)

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  • MikB commented on supersoftdrink's instructable Bent Wood Rings1 year ago
    Bent Wood Rings

    Tried both ways, as a test ...1) Ash branch piece, left with natural edge, milled and sanded out the centre, sealed with nitrocellulose, like https://www.instructables.com/id/DIY-Wooden-Ring/2) Figured maple and teak veneers, sealed with cyanoacrylate, like here!Definitely a bit fiddly the first time!

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  • MikB commented on MoundofMittens's instructable DIY: Wooden Ring1 year ago
    DIY: Wooden Ring

    Tried both ways, as a test ...1) Ash branch piece, left with natural edge, milled and sanded out the centre, sealed with nitrocellulose, like here2) Figured maple and teak veneers, sealed with cyanoacrylate, like https://www.instructables.com/id/Bent-Wood-Rings/Definitely a bit fiddly the first time!

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  • MikB commented on jur-and's instructable Black$Decker Dustbuster New Battery1 year ago
    Black$Decker Dustbuster New Battery

    Good idea -- especially in disconnecting and NOT USING the original charger. That's important here, as a NiCd charger -- especially the very simple ones like used on a DB, will destroy the Lead Acid battery.

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  • MikB commented on woodshopcowboy's instructable Stackable Shop Storage Boxes 1 year ago
    Stackable Shop Storage Boxes

    I think they are practical -- it's in the nature of stackable boxes that you have to unstack them to access them. Tell it to ADDIS and other plastic box manufacturers that do the same :) Same problem with storage in cardboard boxes, but they can also collapse under the weight.For front openings -- if the opening is too big, stuff falls out. If you angle the opening, you've re-invented the stackable storage bin e.g.e LinBins which allow access. And made the woodwork a bit harder.If you want them to slide out, they are no longer stackable, it's called a set of drawers.Depends what you're looking for, really :)

    Ah, that makes sense now. I only noticed this, and came back here, after trying to build a spreadsheet to juggle the box dimensions/number of pieces-per-sheet/size of rebates-vs-thickness/costs for different sized sheet materials and boxes.My base-pieces ended up being the same size as one internal dimension of the drawer, as I'd followed a little TOO closely :)You may wish to email service(at)instructables.com and ask them to "remove the cached PDF" for this instructable -- anyone downloading this still gets the old measurements as instructables create the PDF the first time someone downloads it, and cache it.

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  • MikB commented on woodshopcowboy's instructable Stackable Shop Storage Boxes 1 year ago
    Stackable Shop Storage Boxes

    The base is 11.5" sq. Two front/backs are 11.5" and two sides are 12.25" -- you are correct that something is off with the maths here, as the sides (0.75" thick) would lead to a 11.5" by 10.75" internal to the drawer the way they are overlapped.That means the base would only overlap in the lower rebate on two sides (the 10.75" dimension, by 3/8" each side) and "miss" the other two, falling short. The picture clearly shows the intention /actuality to sit on all four rebates. Can @woodshopcowboy check the measurements and clarify?Definite think twice/measure twice/cut once situation there :)

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  • MikB commented on NKSP's instructable How to put a Rubik's Cube in a bottle!1 year ago
    How to put a Rubik's Cube in a bottle!

    Note: This instructable uses a fakey-knockoff of the real Rubik's Cube, and the design is a little different.An actual Rubik's cube does not have any pop-off caps or screws. It's all twist-pull-and-lever to get them apart! So don't spend too long looking for the hidden screws :)

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  • MikB commented on The-Skint-Woodturner's instructable Tetris Block Costume1 year ago
    Tetris Block Costume

    Bathroom breaks are not your only problem with this costume. If the two of you stand too close together, you may disappear a row at a time! :)

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  • How to Take Care of Butcher Block Countertops

    I think the beeswax gets carried into the wood along with the mineral oil, and helps seal it up. It also smells great when you're melting it. Not much residual smell once applied.A lot of non-food wood products get sealed up/polished/protected with beeswax+turpentine or beeswax+linseed oil -- but those aren't considered "food safe" mixes. And usually have lavender or something added to make them smell nice!It's not particularly expensive, I'm sure a huge block would would cheaper (per oz) if you used a lot of it, but I just got a couple of 1oz blocks off eBay :)

    Funnily enough, I've just finished doing "step 1" to my chopping board, which was getting a bit care-worn, and retaining water at the slightest provocation. Zap it with sand paper all around and then ...1 oz/30g bar of filtered beeswax, melted into 200ml of mineral oil (liquidum paraffinium, which sounds SO like a made up name) -- I used Johnson's "first touch" baby oil. Important: Unscented, no aloe-vera or other additives. No smell, no taste. If it's safe enough to dip babies in ... :)Within a day of slathering this stuff on, most had been eaten by the wood.It now looks much better, and is waterproof again. The original coating was some kind of surface varnish which flaked off over time!

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  • MikB commented on Howterson's instructable Tree stump lamp1 year ago
    Tree stump lamp

    "Now have to make the bottom part. You can just get a thin piece of plywood"If you think about this step, you could have taken a 0.5" slice off the bottom of the log before you started the drilling/filing, saved it, and put it back at the end as a base-cap :) This is a trick used on a lot of bandsaw-boxes (plenty of examples here on instructables) made from single chunks of wood.Not a criticism, just a heads up to anyone building one of these in future.

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  • MikB commented on Eb10064's instructable Sterilise Home Piercing Needles1 year ago
    Sterilise Home Piercing Needles

    For sterilizing: A blue flame is better than a yellow one (as you point out, you get sooty bits with a yellow flame!) -- try a gas burner (e.g. cooker) or a little spirit burner.Also -- keep the Isopropanol well away from the flames, it's flammable :)

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  • MikB commented on MikB's instructable Pinebox Portable Computer1 year ago
    Pinebox Portable Computer

    Box says: "K-Smart 88 Key Mini Multimedia Keyboard" which appears to be "1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory" by lsusb output.It's a full size keys, but reduced footprint keyboard. I can't be doing with keys that aren't the right size (miniaturised layouts), it messes up my typing :)

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  • MikB commented on Challon's instructable Damaged Soil Moisture Sensor Upgrade1 year ago
    Damaged Soil Moisture Sensor Upgrade

    If you change the polarity of the current every time you probe, that would constitute AC, although VERY low frequency :) It will do wonders for the life of the probe.The worst case is a constant DC current, just left there to eat the sensors :(

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  • MikB commented on Challon's instructable Damaged Soil Moisture Sensor Upgrade1 year ago
    Damaged Soil Moisture Sensor Upgrade

    They "corrode" because of electrolysis. The metal from one electrode is driven off into the soil of the plant, which is not great news for the plants :)This is because most of these soil/water level sensors use DC to sense. The only way to really stop this is to use an AC sensing current, or very intermittent probing with a low DC current (which will delay the inevitable). Either way, it is slightly harder work.

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  • MikB commented on tanner_tech's instructable Tube Record Player Restoration1 year ago
    Tube Record Player Restoration

    Nice work -- this deck looks exactly like a "Monarch" branded deck I have in a VERY old "Westminster" gramophone-radio -- also valve based. I think the actual deck is made by BSR, and branded by others.http://www.vintage-radio.net/forum/attachment.php?attachmentid=26709&d=1246114106

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  • MikB commented on kitty 1234's instructable Simple Hot Wire Foam Cutter1 year ago
    Simple Hot Wire Foam Cutter

    But at least they work! A PP3 battery is really too small to be annoying it with a load like this. Also, consider that the PP3 will last VERY little time, in the long run PP3 batteries will cost you more.

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  • MikB commented on emills05's instructable How to Make an UTP Cable Cutter With Pegs1 year ago
    How to Make an UTP Cable Cutter With Pegs

    Nice hack, I have to ask though -- what are you using to crimp the connectors onto the UTP cable? These tools usually come with a stripper (outer jacket only) and cutter (all through) built in. Or are you only using the UTP cable for other purposes (i.e. not fitting RJ45 and similar) ?

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  • How To Make Spray Paint Can From Empty Deo Can.

    Well done on *not* re-purposing an aerosol can into an unreliable, inconsistent pressure, hazard in waiting :) This makes a refreshing change ... !

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  • MikB commented on tclarkePC's instructable Laser Cut Electric Guitar1 year ago
    Laser Cut Electric Guitar

    Plywood should easily take nylon strings (I've made a nylon-strung ukulele out of corrugated cardboard, it is still strung and tensioned and hasn't imploded yet!) but a truss rod will stiffen it, and give you some adjustment after the fact :)https://www.instructables.com/id/Another-Cardboard-...Plywood necks will work, for steel strings, but you really do need the truss rod then.https://www.instructables.com/id/The-Hero-Guitar/A short neck, and even with a steel square rod bonded in there, there is some movement under string tension and creepage over time.Good luck with tweaking the designs!

    Can I just say https://www.instructables.com/id/Fully-Plywood-Gui... at this point :)Plywood neck, truss rod, steel strung.

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  • MikB commented on tclarkePC's instructable Laser Cut Electric Guitar1 year ago
    Laser Cut Electric Guitar

    Classical guitars usually have nylon strings, hence lower tension, and so they don't have/need a truss rod. Hence the caution NOT to slap steel strings on a random acoustic guitar -- if you pick the wrong guitar it bends/snaps.Acoustics designed for steel strings have a truss rod.If your neck is already bending under the tension, it will only get worse over time, so more truss rod action needed to counteract the string pull (or stiffer wood).

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  • MikB commented on tclarkePC's instructable Laser Cut Tenor Ukulele1 year ago
    Laser Cut Tenor Ukulele

    "figure out where the string is slipping" ... if these are new strings, they will continue to stretch for quite a while. Eventually they will stabilize. You may be looking for a slip that isn't there :)

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  • MikB commented on Nematic!'s instructable Capacity Test of Fake 186501 year ago
    Capacity Test of Fake 18650

    Why mAh?... because batteries (small ones) are mostly described in mAh capacities. Big ones (car batteries) tend to be Ah capacities.We are crossing the boundary where "small" batteries are starting to get big capacities. So not sure which unit to go with. I agree, we probably should have stopped at 999mAh and switched to 1Ah from there on. However ...... marketing departments like BIG numbers because big numbers are more impressive. 10400mAh is WAY bigger than your puny 10.4Ah battery :)So that's why.This aside, it doesn't matter what's written on the label, if the batteries are cheap/fake you will get much less. Followed by possibly free smoke and flames.

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  • KeyPi - A cheap portable Raspberry Pi 3 "Laptop" under $80

    Then you shoulda got a NewBrain, which had a built in screen. Mind you, it was only like 1 line of 16 characters :) Or an Amstrad NC100.This project has definite potential!

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  • MikB commented on miraheng's instructable Arrange Your Eggs!(Easy)1 year ago
    Arrange Your Eggs!(Easy)

    Not stuck in -- pretty much the same as yours (but paper, not plastic) -- two rows of egg-carton almost exactly fits the depth of the door's top compartment. Just pushed into place, it stays put by friction.

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  • MikB commented on miraheng's instructable Arrange Your Eggs!(Easy)1 year ago
    Arrange Your Eggs!(Easy)

    "Keep refrigerated once purchased". Right there. On the box. Written, I assume, by the chickens that laid them :)Our old fridge had an egg-storage area in the door. The new replacement fridge didn't, so I did something similar with a large (papier-mache) egg box, cut down to fit the top shelf of the door. Holds 10 eggs (2x5 egg-cups). Why the manufacturers didn't provide one, I don't know :(

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  • MikB commented on Hexkiller's instructable DIY guitar speaker1 year ago
    DIY guitar speaker

    Maybe you've got lucky, or just not noticed it :) But if you see anyone like KT Tunstall or Ed Sheeran playing an acoustic rhythmically, they actually make USE of the resonant sound of the guitar, tapping, slapping it. Acoustic guitar players will know the sound I mean, there is a distinct "note" to an acoustic guitar body, varies with size. It's far from an "ideal" speaker enclosure, which you normally don't *want* resonant peaks in, as it makes the sound ... peaky.Glad it's worked out for you! :)

    More to the point, doesn't it resonate like crazy and emphasize certain notes? Especially the "note" you usually get when you tap the body!It does look good though :)

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  • MikB commented on Lorddrake's instructable Water Level for Less Than $101 year ago
    Water Level for Less Than $10

    "If I need to make another one of these I will remember to put a spacer (2 quarters would do the trick)under the yardstick in case of drips."... or some of that clear packing tape (wood glue doesn't stick well to it), or even some greaseproof paper/baking parchment. It's fairly non-stick, when it comes to PVA.

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