DIY

• Geometry

  Triangle

  Specify 2 measures of a right-angled triangle to determine the remaining measures.

  u = your unit (mm, cm, m, inch...)

  Arc

  Calculate the length of an arc based on a radius and get its surface.

  Surface

  Add rectangular surfaces and remove the openings.

  1a = 100m²
  1ha = 10.000m²

  Volume

  Convert liters ⇄ m³ ⇄ dm³ ⇄ cm³

  Bubble level

  Measure angles with your device.

• Chemicals

  Fusion (melting) temperatues

  A list of fusion or melting temperatures for different materials.

  Plastics

  ABS

  200250

  Acrylonitrile Butadiene Styrene

  Burning releases toxic fumes, including HCN and CO.

  EVA

  85100

  Ethylene Vinyl Acetate

  Burning can produce acetic acid and other harmful fumes.

  LCP

  280290

  Liquid Crystal Polymer

  Can release toxic fumes when burned.

  Nylon 6

  215225

  Polyamide 6

  Burning produces toxic fumes, including NOx.

  Nylon 6,6

  250265

  Polyamide 6,6

  Burning produces toxic fumes, including NOx.

  PAI

  275290

  Polyamide-imide

  Can produce toxic fumes, including CO and NOx.

  PBT

  225230

  Polybutylene Terephthalate

  Can release toxic fumes, similar to PET.

  PC

  250280

  Polycarbonate

  Burning can release bisphenol A (BPA) and other toxic fumes.

  PE (HDPE)

  125135

  High-Density Polyethylene

  Generally low toxicity; burning can produce CO and CO₂.

  PE (LDPE)

  105115

  Low-Density Polyethylene

  Generally low toxicity; burning can produce CO and CO₂.

  PEEK

  343

  Polyether Ether Ketone

  Releases harmful fumes when burned, including CO.

  PEI

  215225

  Polyetherimide

  Can release toxic fumes when burned.

  PEN

  270

  Polyethylene Naphthalate

  Similar to PET; can release toxic fumes when burned.

  PEO

  6570

  Polyethylene Oxide

  Generally low toxicity; can produce irritating fumes.

  PET (A-PET)

  230

  Amorphous Polyethylene Terephthalate

  Burning can produce toxic fumes, including aldehydes and CO.

  PET (C-PET)

  255265

  Crystalline Polyethylene Terephthalate

  Burning can produce toxic fumes, including aldehydes and CO.

  PMMA

  160165

  Polymethyl Methacrylate

  Low toxicity; burning can release methyl methacrylate monomers.

  POM

  165175

  Polyoxymethylene

  Produces formaldehyde and other toxic fumes when burned.

  PP

  160170

  Polypropylene

  Low toxicity; burning releases CO and CO₂.

  PPO

  265

  Polyphenylene Oxide

  Burning can produce toxic fumes.

  PPS

  280285

  Polyphenylene Sulfide

  Can release toxic sulfur oxides when burned.

  PS

  100120

  Polystyrene

  Produces toxic styrene fumes when burned.

  PSU

  185190

  Polysulfone

  Can release sulfur oxides and other toxic fumes when burned.

  PTFE

  327

  Polytetrafluoroethylene

  Releases highly toxic fumes, including fluorine compounds.

  PU (Thermoplastic)

  170200

  Polyurethane (Thermoplastic)

  Burning can produce highly toxic fumes, including HCN and CO.

  PVC (Flexible)

  100120

  Polyvinyl Chloride (Flexible)

  Highly toxic when burned; releases HCl, dioxins, and other harmful compounds.

  PVC (Rigid)

  160210

  Polyvinyl Chloride (Rigid)

  Highly toxic when burned; releases HCl, dioxins, and other harmful compounds.

  PVDF

  170175

  Polyvinylidene Fluoride

  Burning produces toxic HF gas.

  PVOH

  180220

  Polyvinyl Alcohol

  Generally low toxicity; can release irritating fumes when burned.

  TPE

  130180

  Thermoplastic Elastomers

  Varies by composition; can release toxic fumes when burned.

  Metals

  Ag

  962

  Silver

  Generally safe; can produce oxide fumes at high temperatures.

  Al

  660

  Aluminum

  Safe; oxide layer may form but is not harmful.

  Au

  1064

  Gold

  Safe; does not produce dangerous fumes.

  Br

  900940

  Brass

  Can produce zinc oxide fumes, which are harmful if inhaled.

  CS

  14251540

  Carbon Steel

  Can produce iron oxide fumes; use proper ventilation.

  Cu

  1084

  Copper

  Can produce oxide fumes; use ventilation.

  Fe

  1538

  Iron

  Can produce iron oxide fumes; use ventilation.

  Ni

  1455

  Nickel

  Produces toxic nickel fumes; use proper ventilation.

  Pb

  327

  Lead

  Highly toxic; produces lead fumes, use proper ventilation and PPE.

  SS

  13751530

  Stainless Steel

  Can produce toxic chromium and nickel fumes when heated.

  SiBr

  9101027

  Silicon Bronze

  Produces zinc and copper oxide fumes; use proper ventilation.

  Sn

  232

  Tin

  Safe at normal soldering temperatures; can produce fumes when overheated.

  Ti

  1668

  Titanium

  Safe, but may produce titanium oxide fumes at very high temperatures.

  Zn

  419

  Zinc

  Produces zinc oxide fumes, which are harmful if inhaled.

  Proportions

  Calculate volumes for the right concentration.

  Solution Concentration Calculator

  Calculate how much solvent to add to reduce the initial concentration to the desired concentration.

• Electricity

  Lumens to Watts

  Convert approximatively Lumens to Watts.

  These values can vary greatly depending on the type of bulb and the refinement of the technology used.

  Ethernet

  Wires colors for a proper ethernet connexion.

  To connect a PC to a hub or switch, use a straight-through cable.

  T568B straight-through cable (commonly used).

  • Pin 1: White/Orange
  • Pin 2: Orange
  • Pin 3: White/Green
  • Pin 4: Blue
  • Pin 5: White/Blue
  • Pin 6: Green
  • Pin 7: White/Brown
  • Pin 8: Brown

  
  

  To connect two machines directly, use a crossover cable.

  T568A (one end):

  • Pin 1: White/Green
  • Pin 2: Green
  • Pin 3: White/Orange
  • Pin 4: Blue
  • Pin 5: White/Blue
  • Pin 6: Orange
  • Pin 7: White/Brown
  • Pin 8: Brown

  
  

  T568B (other end):

  • Pin 1: White/Orange
  • Pin 2: Orange
  • Pin 3: White/Green
  • Pin 4: Blue
  • Pin 5: White/Blue
  • Pin 6: Green
  • Pin 7: White/Brown
  • Pin 8: Brown

• Mechanics

  hp ⇄ kW

  Convert hp ⇄ kW.

  1hp = 0.7355kW

• Music

  Guitar tuner and frequency analyzer

  Get the frequency playing and tune your guitar.

  Sound synthesis

  Create a sound at a specific frequency or musical note.