So, I was installing a new thermostat for my girlfriend and when I turned the breaker off, I only turned off the ac breaker, not looking or realizing that her heat was on a different breaker. I just assumed the breaker labeled "ac unit "meant both.
Well, the wires sparked and now neither her old or new thermostats are getting power. I even touched the red and green wires together to try and get the blower to turn on, but nothing.
Have I blown something in her unit? I didn't smell anything.
>>946320 >breaker labeled "ac unit "meant both. this is for the outside unit -240vac The furnace and air handler (blower) are on a different breaker -120vac The transformer for the thermostat is inside the furnace. You probably blew the transformer (24vac) or the 3-5 amp fuse on the control board inside the blower compartment. It's usually a two-blade automotive type fuse,
Let's have a general (subtractive) CNC thread, post shit you've made/designs you've seen/etc. Mills, routers, laser, and punch presses are all welcome.
In the meantime, my dad is wanting me to help my youngest brother get started learning AutoCAD, and being that I am the resident CNC-wrangler I figured the best way to get him started would be designing something straight-forward that can be made (I'm sure it will be a huge help to stimulate interest in the subject), so if I could find some simple, cool things to get him to design and me program it'd be great.
A tad limited on what we can do though, our CNC machines are geared towards bigger stuff, but we've got a punch press (For sheet metal), a 2.5 axis mill (Metal only due to coolant recirc), and a plasma table (Big and messy)
Gonna start out by posting my little personal project at the moment, machining some aluminum grips for an old pistol I've got. (Will get fancy with engraving/anodizing once I get a set made and verify that's dimensions are good)
>>945988 I taught myself autocad in 12 hours and learnt how to write scripts for it.
I have ideas and many many pictures i've turned in dxf's, I want to turn into lights and other arty shit, I might have a guy to build me a cnc, i've been thinking about it for a year or so, i'm just not a precision kinda person or electrical, but he's quoted me £3,000 for a 1x1.5 meter work area cnc miller of plasma.
It would save me spending £25 on N E S W every-time i make a compass
No, not really, especially if you're dealing with stuff 1990 and newer. The gold is minimal and takes too much work and time to be worth it.
If you happen to come across some boards though, tantalum caps can go for a pretty penny, as do transformers and electromagnets (lots of copper and magnets are cool). Variable caps are nice to have around too.
GF screwed up with a piece of second-hand lab equipment (115 V) and plugged it in with a 250 V cord. (Specifically a Forma 3130) What are the odds that there is some fuse protection and the board isn't fried. She texted me after plugging it in, it running for a few seconds, and the magic smoke came out. I've looked into parts and there should be a 1 amp fuse somewhere.
>>945172 It's probably bad news. First, fuses don't normally produce smoke when they fail. Second, you can't protect electronics with a fuse; a fuse takes tens or hundreds of milliseconds to fail, a transistor takes a fraction of a millisecond, and an IC will fail even faster.
OTOH, electronics doesn't usually run directly from mains voltage, and a power supply shouldn't propagate mains voltage in the event of a failure, meaning that it shouldn't have fried anything other than the power supply,... Comment too long. Click here to view the full text.
Got this idea for a ocd-nightmare clock. Basicly it would be just a regular clock, except that the movement of the seconds hand will be independent - having its movement be complete random mess, slowing down, speeding up, stopping completely, even going backwards, etc. You would be able to tell the time just fine since the hours and minutes hand would still work normally.
It just want to have the clock look like a fucking mess. How would I go about making it?
I'm in the planning stages of building a bed for myself and the soon-to-be mrs. as an engagement present. Though I don't know how to join the outer pieces so that i dont have screws showing on the outside.
i dont want to just have at it an put a laminite covering of the outside. any suggestions?
The thing is that I'm starting to practice making this rosettes. But I've been searching and searching a lot to find some templates to start carving them, but I just can't find anything on the internet. They are meant for baroque instruments, and made of parchments or/and quite thin wood.
Any help or idea of where can I get some templates?
if you mean that the thing goes to max volume at 2 instead of 11, it means your gain is too high, or your input level is too high. (both situations mean the same thing, really). if so, since there are so many 'CMOY' designs, it's impossible to say what needs changing.
>>946327 i used this guide: http://tangentsoft.net/audio/cmoy/ i tested at very low input levels and high input levels it just seems to add about 3db at 1/5th pot travel then doesn't get louder after that. works fine before then.
>>946322 ill try swapping with an audio pot, not sure if the one is have is linear or not, thanks for the tips.
>>944697 1. Put bucket and towels under sink 2. Using pipe or strap wrench, remove the P-Trap from the drain pipes under the sink. 3. Say "EWWWWWW" 4. Using a stick, snake, thingy or whatchamajob, scrape out the glop from the trap and exposed pipes. 5. Put it all back together. 6. Don't plug up your sink again, cause you know how nasty it is to fix it.
I have a motor similar to this that came out of a range hood and I am going to use it to make an air filter/negative air machine. It's labeled 115v ~2 amps. It had a three prong connector that I cut off to get it out of the metal housing that I repainted. It has a red, white, and black wire. What is the red wire for? Is it the ground, or is it for a low speed mode?
Did masonry for a couple years so id like to build my own masonry heater eventually, but i have a couple questions. I know its supposed to be a really clean fire/burn but do you ever have to clean them out and how would you clean a multiple bell heater? What exactly makes the firebox burn so much hotter than a normal chimney? How do you attach an oven? Any advice to prevent cracking would be appreciated. And i read its bad to have more than 3 fires per day? any one know why? Thanks for the help
>>945983 You should always have access ports to clean things even if you never need to use them. You never know when you might need to clear out a bird's nest, scared cat, kid's toys, etc. or even the next owner may have those problems if not you.
Make sure everything is fully cured. It may take a few weeks. Keep the mortar properly damp until fully cured and try to make it cure evenly. Meaning do as much of it as fast as you can in as short amount of time as you... Comment too long. Click here to view the full text.
>>945985 I like them and don't like them for the same reasons. Cost and materials. In addition to that, they are extremely limited due to the ratio I mentioned above. Take those rocket stoves in homes that use a 55 gallon drum that has its exhaust snaking through a cob or masonry bench to sit on. That longer pipeline for the exhaust ruins the ratio of the rocket stove. It ends up burner at a lower temperature and you get suet/smoke problems again. Doing it correctly means you'll be venting the heat out of the house... Comment too long. Click here to view the full text.
I have an AK platform bayonet, and the metal is fucking hard. Apparently a normal knife sharpener won't work so is there any other household way of effectively sharpening this thing without ruining it?
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