This is my first post, so please forgive me for the mass amounts of autism.
I'm looking for a new couple of projects and want to give creating musical instruments. Thinking maybe a cello or guitar, something that will take time, but also be badass. Not looking for professional, just good enough for me. Also, wtf is sound/tone board? I've been doing some research and am lost.
Does anyone have any experience in building instruments? Or any plans they'd be willing to share?
Can't really help you OP but I bought a really cheap electric body and neck online and am stoked about putting it all together. Need to install frets, enlarge a neck pocket, and drill passageways inside the body.
Though I was fortunate in that Craftsman probably foresaw people doing this, and decided to make the recess fit 1/4" MDF exactly.
You just need to glue on a piece of scrap to "cradle" the kerf on both ends. This will greatly improve the durability of the insert. Doesn't need to be perfect. You just need to know that the kerf will not completely penetrate either end of the support piece.
I cast these .45 auto and 7.62x39 casings in silver but I didn't think drilling out the solid silver center would be this hard and time consuming, I'm thinking maybe I should recast it. Any ideas on how to cast it without drilling all this silver out of the center?
Ok, /diy/ I'm trying to make myself a tiny portable FM radio, inspired by foxhole radios, with an added generic amplifier circuit. Pic related it's the schematic.
So on the left is an inductor L1=100uH with 2 caps. A C2=22pF and a variable C1=(2-10)pF cap to keep the frequency between ~103-89 MHz. The limiting part being the 10pF variable cap available locally (the only one available). Since I can't find a germanium diode like the 1N34 I'm settling for a silicone alternative a 1n41448. C3's are high pass filter capacitors 0.1uF The rest of the circuit is a generic amplifier. The core component being a transistor I chose to use a 2N4904. Now biasing it was a bit of a challenge. So I would be glad if someone could check this part for me. R1 = 5k6 R2=1k R3=10k R4=20k. The battery is a standard 9V battery, since I'd like to fit the whole thing in a small tin box I have laying around. So my question is will it work? Will the diode let the signal through? What will it's voltage be? I looked at the data sheet for the 1N4148 it's min voltage seems to be 0.68V with a pretty long antenna (175-200cm) will it be enough? With the 0.68V assumed I biased the transistor but is it correct?
A 100uH on the VHF band? How did you get such a high value? With the formula f=159/(sqrt(L*C)) [MHz, uH, pF] I`m getting between 2.8 to 3.2MHz and that is HF band. Also the detector in your circuit is for [A]mplitude [M]odulated signals, you will only catch international stations from around the world or some strong local ones. The diode is good but only for the HF bands. The bias for the transistor is quite high and the tranz will be wide open. 3 to 6V ratio smells like magic smoke.
Please, before you continue to the depths of despair as why it`s not working, atleast... Comment too long. Click here to view the full text.
>>909943 Ty for the info anon I'll re check my equations... Isn't the formula f= 1 / ( 2*3.14(sqrt(L*C)) ? Still that's very high for AM. You wouldn’t happen to know where I could read up on the theory from a reputable source... I'm scrapping this together form old physics books from university and most stuff I look up online isn't reputable or reliable or is very basic to the point of being useless.
>>909966 1/2pi = 0.159 and your equation uses F, H and Hz. The radio in your pic is what can be used to receive AM. It's basically a crystal set with an amplifier and both the circuit topology and the component choices suck at 100MHz FM. You can try your luck with regenerative receivers or one-chip-does-it-all type IC receivers (TDA7000 or whatever is its current iteration). Or you can build a superhet, but it requires much more work and skill. Usually people building radios start from simple AM receivers, but better... Comment too long. Click here to view the full text.
/k/ is making a religion. I can't be assed to come up with any ideas for religious clothing on my own. /fa/ is being a bunch of little bitches, so what would /diy/ suggest or submit as holy garments for the Kubist religion.
TL;DR Giant gun Kube gives reason for life through warfare. Gun is life. Life is strife.
Politics aside, what kind of garb shall we wear. Draw thread if necessary, but I'm open to whatever ya got. >All religious people have distinct hats
Let's see what ya got
May your enemies die... Comment too long. Click here to view the full text.
Hey /diy/, I am trying to build the smallest ping pong launcher robot. I thought i could use co2 canisters but i am not sure how to use it properly. Is it feasible to use co2 canisters for My objective? What do i need to use for connections and selenoid valves? How can i connect the cartridge to the system since it requires to be opened by puncturing? Thanks alot. Any keyword or another approach is very well welcomed.
>I'm new to electronics, where do I get started? There are several good books and YouTube channels that are commonly recommended for beginners and those wanting to learn more, many with advanced techniques. The best way to get involved in electronics is just to make stuff. Don't be afraid to get your hands dirty.
>Links to get started http://pastebin.com/9UgLjyND
I want to connect a single 3.5 wire from the computer and have it split into speakers and headphones. I want to have two switches connected to the ground of each (Headphones/Speakers) so that I can choose which one gets any sound. Would that work? Will the headphones stay silent with R and L connected but GND being opened at the switch? I can whip up a diagram if the description above is confusing.
>>910040 > Will the headphones stay silent with R and L connected but GND being opened at the switch? No. You need to use a double-pole switch to switch both the R and L wires.
Also, you really should be connecting speakers and headphones to different jacks. Active speakers (powered, with a built-in amplifier) should be connected to the line-out jack, headphones to a headphone jack.
A headphone jack may have too high a voltage for something expecting a line-level signal, which will... Comment too long. Click here to view the full text.
>>910048 Ok, I will look into double-pole switches.
The reason I'm doing this is because at the moment I change between headphones and speakers (Amp with speakers attached to them) by changing what is plugged into the Audio/USB extension that used to be in the front panel. Works fine for me, but I would rather reduce the number of lose cables and switch between the two with a flick.
For a physics project (im in high school), i would like to build a spot welder, similar to this video. https://www.youtube.com/watch?v=GCrqLlz8Ee0 I have little experience working with very high currents, but if i take proper safety precautions, such as wearing thick gloves, proper welding goggles, etc. would it be advisable for me to attempt to build this?
>>909759 i made one, there are videos on making a jig for a spot welder. its not hard, the hardest part for me was making the coil. i got a microwave from a thrift store and removed the transformer. 10g wire from lowes was like 12$ for 50 feet. >> inb4 underage b&
you really only have to protect yourself from the 120V primary, coz the secondary is just a couple of volts. so, if you cover the 120V terminals with heat-shrink or tape, the rest is relatively safe, unless you nicked the primary wires, exposing the copper. as for welding goggles, you dont need them. it shouldnt be any brighter than birthday sparklers.
The problem with them is people using a thin little $5 20foot long cord designed to run a single lamp or two, but plugging in three lights, a space heater, aquarium pumps and heater and seventeen strings of christmas lights.
All power cords that are listed or registered will have a load rating. Do not exceed it.
The other problem is extrnsion cords spanning traffic areas making a tripping hazard.
If this photo is your situation, I would find a cord with... Comment too long. Click here to view the full text.
All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.
This is a 4chan archive - all of the content originated from them. If you need IP information for a Poster - you need to contact them. This website shows only archived content.
If a post contains personal/copyrighted/illegal content you can contact me at email@example.com with that post and thread number and it will be removed as soon as possible.