datoo786

• A video might help, I got lost in the process of you making the gearbox

• it's a cool idea! Also, it can be done by LEGOs if you have some.

• It's been a longtime since I did this but I will share my views here. You can avoid all the electronics, off balanced load due to connected bits in the spinner. I liked the data logging idea.Get an App - magnetic detection, stroboscope, turntable or sound/oscilloscope (connect cable tie to hit something when it rotates). I used sound/oscilloscope app which draws peak curves against time. The app will calculate time from one peak to the other. If you calculate 60/time, it will give you RPM.You have the mass of the spinning body (m), radius of the spinner (r). Therefore, Force towards the center: F=m*r*speed (in rad/sec). Then F/m will give you acceleration. Then a bit of programming in Excel for data logging, you should get the results for your acceleration. I don't think you need to worry…

see more »

It's been a longtime since I did this but I will share my views here. You can avoid all the electronics, off balanced load due to connected bits in the spinner. I liked the data logging idea.Get an App - magnetic detection, stroboscope, turntable or sound/oscilloscope (connect cable tie to hit something when it rotates). I used sound/oscilloscope app which draws peak curves against time. The app will calculate time from one peak to the other. If you calculate 60/time, it will give you RPM.You have the mass of the spinning body (m), radius of the spinner (r). Therefore, Force towards the center: F=m*r*speed (in rad/sec). Then F/m will give you acceleration. Then a bit of programming in Excel for data logging, you should get the results for your acceleration. I don't think you need to worry for vertical accelerations, they are balanced else it will will fly straight up or sink down.

• Sorry for a novice question as I understand more about metals and how a bimetallic strip works. In this Instructables, is one piece of wood reacts to moisture (cut across the grain) and the other provides strength (cut with the grain)?

• Take 2 toothbrushes, hold with rubberband, of you go!

• You have got a great scope for future generations. No drawings, no software, no 3D modelling, just simple mechanical and electrical engineering = awesome!Ask someone to do that in the UK, as I say, 500 engineers will surround you doing nothing, just making you go bankrupt. You must take your skills to next level - show others how to make it and I am sure there is a potential as everyone is becoming lazy to ride a bike plus "eco" world is is recent buzz.One last thing to look into is to waterproofing it.Good luck!

• datoo786 commented on hackplague's instructable Automatic Stair Lights

You can use a variable resistor or a transistor circuit connected to potential divider to control piezo sensitivity. In all, just use two piezos - one at the upper step and another one at the lower step. If still no luck, use a home made vibration sensor - spring soldered one end with a ball bearing, and a hoop shaped copper wire around the ball bearing. I think the idea should be similar to Air Wick Freshmatic Compact equipment. I did circuits long ago, I am afraid I have no examples left.

• Considering the system pressure, are we saying that the pressure gauge needle return spring has enough force to push the main piston back to datum? If that is the case, a video would help because the video stopped after the main piston was pushed in.

• datoo786 commented on hackplague's instructable Automatic Stair Lights

Life would be so much easier if people thought of simple solutions with simple ideas. There are night light available in DIY stores, add piezo sensor in series to the LDR and place it on the floor to detect vibration. Hence, just connect them in parallel circuitry, place each one on landing, powered by the mains plug. Simple analogue solution, no Arduino or programming is required.

• As the piston compresses the fluid to give a reading on the gauge, what brings the piston back to datum position?

• I am just guessing, how about lorry or truck wheel cylinder, which are commonly obtainable and to save more money?

• Nice modification! For prolong usage, what stops water to get to the motor via the propeller? I can see some surface rust on the propeller, does that mean some water seeps through?

• For straightness in the wooden arrow, use a glass laid flat on a table. Same method for checking engine valves.

• As when entering washroom, how does the alarm system work to not activate the system? What if it's a public washroom, one is entering first, holding the door and the other is exiting (may be not washed hands)? Sorry if I missed some info already there, just a cool invention..!!

• Sometimes the start and finish line are at the same point. I think a combination of using 1 LDR and monostable does the job? Not sure as I am not into circuits but I have heard of monostable, astable, flip flops, etc. What if you have more than one race car?

• datoo786 commented on SimonRob's instructable 3D Printed Earth Clock

First of all, a brilliant project and well thought..!!! I have seen science school paper asking seasons (see attached image). Many students haven't got a clue about earth's orbiting while tilting. Your project is well set out to explain it very well.Your 3D printed gears are brilliant, including the embossed text. I never imagined 3D can give very close accuracy. I am working on a project using Fusion 360, and the minimum size of gear I have outlined is 10T, 5mm PCD, 0.5 Mod. I'm still in the thought process if they need special mould to make these gears or 3D printing should do the job.

• datoo786 commented on Phil B's instructable 555 Capacitor Tester

Majority of circuits have many capacitors. It can be difficult to unsolder selective capacitors to test them. It is much easier to use a multimeter which tells you the capacitance.

• What software did you use for 3D design? Did you replicate your project from a similar working band saw?

• Hi,I am in the UK and wondered if DB25 to DB9 Cable would do the job. Attached are links for the relevant cables:https://www.amazon.co.uk/C2G-Female-DB25-Modem-Cab...https://www.avpartsmaster.co.uk/p-56096-c2g-2m-db9...https://www.ebay.co.uk/itm/293041780863?chn=ps&nor...https://www.ebay.co.uk/itm/313390367682?chn=ps&nor...Thanks!

• Just buy an IKEA - TERTIAL lamp - modify and use as a lamp or a holder.

• Recently built a scanner from Legos for A4 scanning. Saves all the hassle you have gone through plus Legos are cool and reusable again.

• Nice attempt, however, basic electronics are readily available to other countries. Therefore, have a look at this beautiful project:https://www.instructables.com/3D-Printer-Bed-Leveling-Assistance-Tool/?utm_source=newsletter&utm_medium=email

• That helps a lot, thanks!Some are in Europe and one in the UK, which makes it easier for me as I am in the UK. The smallest gear has 10 teeth 0.5 Module, and I have read comments online it is not very preferable via 3D printing. However, as you say, it is possible to achieve small parts, then surely will give it a go by contacting them.Thanks once again.

For a prototype, for example a gear wheel, I guess 3D printing is not very accurate. That applies to small items as well. What would be your suggestion to change a 3D model to a prototype, based on 1 off small items? I am sure people in far east are ready to accept big quantities but not sure if they can spend time going through all the details to make a prototype.I am designing a sophisticated toy car which has a few mechanism. My background is in Mechanical Engineering, however, I lack the knowledge when it comes in making parts from plastics. I am using Fusion 360. Thanks.

• Great Instructable! I learnt something new about using Colab Notebook. However,have you thought about using MathCad or Excel to generate calcs? Also, there are many online calcs which can also draw the gears for you and supply a 3D file.

• By the time you work out the cost of making it, it might end up in the museum of inventions. Think simple & think smarter. Therefore, work smarter not harder!

• Great and detailed Instructable!! You have educated me using printed drawing, glued to the aluminium sheet.About using the dial gauge, if you cut a piece of metal/wood of an exact size and use as your template for rail alignment - starting at one end then bolt the rail, move to the other end, bolt the rail again. This way also you can have a perfect parallel aligned rails.Your background is in Civil Engineering, you have shown more interest in Mechanical and Electronics Engineering. Is this all self taught or your degree title is wrong? :-)

• Thanks!

• A video would help to show if it flies or just flutters, and for how long.

• Great project and the details given! I am in the process of creating decals for my mountain bike. Any suggestion for printing on vinyl and what type of printer gives excellent results?

• datoo786 commented on ArtushS's instructable CAR HORN ON a BICYKLE

I see you have not used a relay or a transistor, I think it will help to preserve your laptop battery even longer?

• Not sure about the original motor that came with the blades, what if you tried using an inverter (12V solar panel, charge controller, battery, inverter - to give AC voltage)

• Wanted to design a waistcote and came across here. There are no details what measurements are needed, and how to set it up, where to sew etc etc

• datoo786 commented on Erriez's instructable Dupont Crimp Tool Tutorial

Just a simple question, came across this tool, will it able to strip the wire and crimp properly?If you search under eBay "Professional Automatic Wire Striper Cutter Stripper Crimper Pliers Terminal Tool".

• Wonder what camera have you used? A go pro? What accessories with it? The recording is very good and so so so stable!!

• I could not find any information about you comment here? Do you have a back up for what you heard and this someone told you things about?

I could not find any information about you comment here? Do you have a back up for what you just said? I always thought Japan produces its own resources.

• datoo786 commented on liquidhandwash's instructable Rat Rod Rescue

Thanks for taking the time to reply!Keep up with your work and good luck!

• datoo786 commented on liquidhandwash's instructable Rat Rod Rescue

Hi there,Read your Instructable in depth 'cos many out there like me do not know how to modify or make something work when the original part fails. I am keen to know more from your Instructable as certain areas were not in detail and made me more curious to find the answers from your knowledge. If may I ask....Where do you look to check compatibility for a carb? You have used a carb off a Mazda or ford 626, I wouldn't imagine it would fit 'cos Toyota is a Toyota and and it won't fit part taken from another car.An engine such as 3sge, out of an MR2, is a mid engine and mounts in transverse with the differential/gearbox arrangement. The Hilux engine is a inline, so how would a transverse engine work inline?Also, how did you figure it out that 3sge engine would specifically fit with y engine…

see more »

• Hi there,Great Instructable!! I learnt that:- Microsoft Visio is an alternative to AutoCAD (for accurate drawing and dxf capabilities),- A tub/shower flange is not just a plumber's item.I may have missed it out somewhere about the cylinders held with the leg. They fit like a glove but are they held with glue?Thanks and keep up with good work!

• Can Vibration app do the same job?

• datoo786 commented on MrSirLRD's instructable Automatic Sit/Stand Desk

I am not sure about the issue of flex in the actuators, as IKEA do use them and there has been no known issue. A worm gear won't be able to turn a spur gear. I am more of mechanical mind and really liked your design. How about something similar to a crank frame as SeanB10 said, connected to a motor?.

Hi there,Very impressive design and simple approach! I hope IKEA learn from simplicity of your design.I have two suggestions:- Having two actuators connected in parallel so they can offer equal output = stability for your desk,- Do you really need Arduino? A magnetic reed switch or a long lever microswitch, connected to an analogue circuit should do the job.Thanks, and keep up with your design!

• Hi there,I totally agree with you. It was my confusion thinking there was L-profile under the U-profile. Once again keep up with good work. Simple engineering = big benefits. Any other solutions you have to share?

• Hi there,This design caught my eye. It made me think how it works and then I decided to ask you more about it. I hope I am understanding the mechanism correctly.At the wall end, the U and L profile increase the thickness of the profile.At the bolt-head/nut/L profile, there is just L profile. When you tighten the nut, that would put pressure on this L profile. This plate is more likely to bend more that the thicker profile at the wall end.Thanks!

• Very impressive and simple press drill!May I ask, what size of steel bracket did you use? Where would I source it as I am based in the UK? For stability and rigidity, how did you mount the drill with this bracket?Keep it up with the project!

• Hi there,Very neat and clever!! By any chance, do you have Instructables for the CNC build? It would be nice if you can at least put a part list for the CNC.Thanks!

• Hi there,This is an interesting project.I have two question to ask you. Can a reed switch (NC) be soldered to the speed dial button without the need of a relay?. Here is a link: http://www.maplin.co.uk/p/miniature-magnetic-conta... What other phones are possible to soldered, apart from Nokia.Thanks!

• Hi there,This is an interesting project. May I suggest something simple?If you solder a reed switch (as suggested by rfitzgerald) directly to the speed dial button, will it work? You will avoid building all the circuit you have shown here.Thanks!

• Very impressive!For the sides, you have used the wheels as a gauge to determine overall length and height proportions. How did you go about sketching for the front/rear?

• Thanks for your info.I agree with your comment about 90 degrees between x and y axis in the Sketchup Pro.I experimented with a Hexagonal Prism. As we know it has the internal angles of 120 degrees. I took the known length as 280cm. The rest of the lengths should have been the same. Unfortunately, Sketchup Pro was not beneficial at all.Attached are 3 images with aligning x and y at various points..Thanks.Phot

• Just curious to understand about the Red and Green dotted lines in Sketchup program, what if the item in the photo is an irregular shape? In other words, the Red and Green dotted lines are not aligning perpendicular. Will the measurements (or one of the lengths) turn out wrong when the item is scalled on a 3D program?