So /diy/, due to watching a few videos I've decided to make a coilgun over winter break. Only problem is, I know next to nothing about electronics.
Now, I'm a decently good with my hands; I can take shit apart and put it back together, I can design bits and pieces and print them out, and I can solder. I just know next to nothing about electronics. I've only taken one class in university, and that was just pretty much "what is ohm's law and how do I resistors and capacitors". We did briefly cover inductors and transformers, but I've largely... Comment too long. Click here to view the full text.
>>913049 Ok well yes you need a lot of wire. Current in a wire creates a magnetic field. The strength of the field is proportional to the amount of current. To create an electromagnet you need a large magnetic field. To increase the magnetic field in your wire you can increase the current or you can wrap the wire into a coil. Each turn will increase the magnetic field proportionally. This uses more wire which has resistance so you need to increase the voltage for the same amount of current. The problem is that a coil of... Comment too long. Click here to view the full text.
>>913142 To get the projectile up to your target muzzle velocity. If you are switching huge amounts of power then hv spark gaps might be a good idea or else some fat mosfet or something. You could use it open loop with just the calculated timing or go closed loop and put a few detectors to switch the coils at the right times. Relays might work but remember the magnetic field will take time to dissipate when you remove power just like it took time to grow. The other thing is that if you put too much power through the... Comment too long. Click here to view the full text.
>>912946 The stabilizer is a module that allows copters and planes to correct his movement in case there appear some undesired movement. I am planning to work without it, only using Arduino and ESC.
About the ultrasonic sensors, I guess I rushed a little bit without thinking about using IR sensor. But since I am pushing for something really simple that works in a kind of controlled environment, I am not asking for much accuracy. Wouldn't be surprised if in the future I change them in case I get it to work.
I... Comment too long. Click here to view the full text.
I wanna put together a Little Free Library and install it somewhere in my neighborhood. The problem is, my neighborhood is in Houston, the most humid place on earth. Is there any way to build a wooden box that will lead to lower humidity inside?
>>912905 Perhaps a solar powered heating pad inside and a thermostat? Though, you want the heat inside to be slightly warmer than the outside air to prevent condensation as night. Aside from that, those Indicating Moisture Absorbing Silica Gel things might work well if it is a small area. You'll need to replace them from time to time. Basically you bake them in the oven until they return to proper color and reuse them.
Hey DIY, looking for some help here on something that I'm sure is really simple
A switch for my fog lights in my car broke, and my car being ~12 years old I couldn't find the OEM switch. I ordered a third party one and it fits like stock, it just has these on the back instead of a female plug like the original switch. I'm assuming its the two wires plus a ground since there's 3 spots? But i'm not really sure which is which is the issue. Was hoping for some help in figuring this out.
Pics of the plug and oem switch are coming too.
Thanks... Comment too long. Click here to view the full text.
>is there some way around that. - If your AC control was all electronc, maybe possible (theoretically) to move it - but, where the fuck to? Has manual rotary dials, etc. - Nope, no way whatsoever - replacing your car for one with a double-din be fucking easier. >I have to settle for a single-DIN stereo? - Basically, Yes.
>>912780 - yeah, dropping an 'all electronic' e46 AC control a notch maybe possible - find me an(y) example where they have done so where previously manual rotaries (as pictured) were installed tho..
If the rotary controls are/were also a simply removable electronic panel (?) maybe possible. If the rotaries are controlling vents manually on stalks or some shit, I really, really would not be in any hurry to be fucking around trying to relocate these, personally. Not that the /diy/ electronic AC control relocation... Comment too long. Click here to view the full text.
Hey diy. I have heard rumors that there is a method of desoldering an entire pcb in a few seconds using hot air rework. Then you basically throw all your components in a big ice cream dish and you are set for life. Does anyone know how this would work? Maybe stick it in one of those toaster ovens and then scrape everything off with a knife? Or use a high temperature heat gun?
The solder on PCBs melt around 180 to 230 celcius, if you can heat the solder more than that, it will melt, and components can be removed, or fall off..
Heating an entire board to this temperature, is a bad idea, as most capacitors are not designed to withstand that, they are normally wave soldered. some components, especially larger ones might be glued to the board, then again no success, smaller SMD components will not fall of by them self due the capillary effects of the solder.
And finally, most components can be damage of excessive thermal stress, especially... Comment too long. Click here to view the full text.
>>912565 Can acrylic be injection molded? All I know is mass producted plastic is injection molded. You might get away with making it from just regular smooth-on molds and clear plastics. If you don't care about it bring real acrylic but will look exactly like pic related, you could make a buck from wood then use the smooth-on products. Not exactly sure how acrylics are done but that's my 2¢ Greentext for convenience > 1: Make a pattern/buck out of wood, clay, paper mache, fiberglassed... Comment too long. Click here to view the full text.
I came across this house earlier today, snapped this picture while driving by, the shingles have this pattern across the entire roof and it looks to be done on purpose, none of the other houses in this neighborhood have this, anyone with any roofing experience have any idea how the hell this is done? I've done some wood working and the best I can come up with would be cutting the joists underneath the shingles in profile and then layering thin plywood on top to keep the profile. not sure if I love it or hate, but positive I want to know how the fuck they did it. any input... Comment too long. Click here to view the full text.
prob. custom curved singles - usually made from steamed cedar, or some shit. I doubt theres an actual undulating form underneath, - then again, I really dunno anything about this stuff, desu. Just a guess..
I am going to try and repair/Replace the RAM chips in a commodore 64B (breadbox, grey function keys) I have the chips and am going to replace all of them rather than checking which ones are broken. (only displays 900ish bytes of RAM) How would I go about doing this and what tools do I need besides a soldering iron?
That done, I also have a Commodore 64C that I've been using up to this point. what would you suggest I could do to mod and upgrade it? Since I have 2 and the 64B is the more classic design, I will keep it as it is.
>>912436 All classic micros have a flat memory layout: a single address bus and data bus wend their way around the system, connecting RAM, ROM and peripherals to the same flat address space.
The C64 has basic bank switching, but all it really amounts to is a helper chip fiddling with some address lines to shadow the ROMs.
Write yourself a version of memtest86, step through the areas where RAM is supposed to be, and when you find the addresses where the RAM isn't working, that'll point you to what isn't... Comment too long. Click here to view the full text.
as Far as upgrades go, I want to try an internal SD expansion, a reset button, a RAM expansion to 128k. I also want to see if their is any way to make the read speed or loading time frequency reduce. If this can be fixed by simply more RAM, I'm all for that, be it internal or external.
I had a 110V arc welder given to me, used it twice, now it collects dust. It worked well with the remaining specialty rod that came with it, getting that rod was expensive compared to the rod i use for my 220v, and that rod worked like crap in the 110v.
if your going to buy an arc welder get a 220v. if you want something 110v get a mig welder with flux core.
Your rod selection for 110v if it draws 15amp or under is limited and when i looked at it 10 years ago expensive.
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