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i am making a record player for a project at school. And I, being (maybe a bit too) ambitious, was thinking about having an external motor to make the thing spin. Now I want to make a basic gearbox, with just two transmissions. I have calculated the gear ratios I need, namely 1:1 and 1:1,35. But when I had a little search on the internet I found out one has to do something with the number of teeth too. How does that work? Is gear ratio not enough?
PS, if you have any other Ideas to change the speed from 33 1/3 to 45 rpm, I'd be very happy. Although I don't want multiple wheels on the top and that you have to manually change the belt from one wheel to the other.
portable steam mop
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there's no dedicated cleaning board, but i guess cleaning is sort of /diy/?
i've wanted a steam mop for a long while and i'm finally in the position to be able to buy one, problem is, due to mixed reviews i have no idea which would be ideal
i'm looking to get something that i can use to clean my carpet and tiles, but also for use in my bathroom so it has to be handheld as well (needs to be available in australia too)
i've found that the HAAN brand has the most consistent good reviews but it's fairly pricey since i'm looking for something in the -$300 range, though i'm willing to pay more if anyone believes it is worth it.
do any /diy/ers use steam mops? is there any that someone could recommend?
[spoiler]if anyone could recommend a better suited board for this please do[/spoiler]
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So, I have a question for you all.
I wrote some scripts and I'm about to start to shoot some videos for youtube, but I have some issues that maybe you could help me with.
I'll record the video with my phone, that can film with some 720p quality. But what bothers me is the audio. Anyone have any experience with professional or semi-professional audio?
Is it hard to edit in the video, how it works, stuff like that.
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Hi everyone, I normally do mechanical and electrical stuff, but this week, I've decided to start gambling on FOREX. I've been playing with simulations to figure out little details that I read but didn't quite understand (limit and stop orders, for example, and the spread enforced by the broker/the broker's fee). I generally feel comfortable enough to dump actual money into everything while still using the simulations for testing things that I'm picking up from my readings and observation.
But now, I wonder how to physically invest money. Do I find a broker, kidnap him/her, and force them to perform my trades? Which broker do I use? Which software do I use? (Will I even have a choice of software?) Is there any such thing as a real-time chart of forex where I can also modify the display according to some technical analysis method? What are some good books? (I have a few, so far, but just on basics and on intermarket analysis.) And many more questions besides that I can't quite understand.
A couple of things I found:
1. FXCM. I heard this screws its customers, though.
2. Metatrader. There seem to be 5 different MT softwares from 3 different companies.
3. Those little things in the android store that are free, which are all that I'm using now.
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Hey, /duy/, I'm currently working on a project that has me working on making a simulated fuel dispenser, I currently got all my cuircuits for the dashboard with a 7 segment LEDs display and the flow measurement done, but I'm having some problems for the pump itself.
I need to cut the power cord and bridge it by means of a push button, this has to activate the pump, to simulate the nozzle's trigger.
I have no knowledge on how power cords are made, so I don't know which wire or wires I need to use to make the bridge with the button, can someone help me out?
Sorry if my question is a bit silly, but I have very poor knowledge of electricity and hardware.
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Would it be stronger to have, for example, 8 M10 bolts, or 4 M20 bolts? As in, is it stronger to have lots of smaller bolts, or fewer but larger bolts?
Also, are welds stronger than bolted connections? Say you want to join two 50x50 square tubes that are 4mm thick, adjacent to one another. Would it be stronger to weld them together or bolt them?