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Join the discussion of general engineering topics. The design, building, and use of engines, machines, and structures. Use the forum for any engineering topics not applicable to the specific categories.

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DIY Projects

Low-Cost Object Detection System Using ESP32-CAM – Approach, Challenges
1K threads
Electronics Low-Cost Object Detection System Using ESP32-CAM – Approach, Challenges
  • Sticky
Sources of Information on Engineering
  • Astronuc
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43
  • Sticky
Insights Why We Don’t Discuss Perpetual Motion Machines (PMM)
  • russ_watters
  • · Replies 31 ·
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31
  • Sticky
YOU: Fix the US Energy Crisis
  • russ_watters
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Backscatter X-Ray Imaging
  • berkeman
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1
  • Featured
Structural failure (buckling) of columns in NY City building, 235 E 42nd Street
  • Astronuc
  • · Replies 13 ·
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13
Method of storing energy on the Moon
  • Al_
  • · Replies 58 ·
2
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58
Why no heatpump/refrigerator combos?
  • oz93666
  • · Replies 15 ·
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15
Weight distribution on a surface
  • pob579
  • · Replies 6 ·
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6
Achievable accuracy of thermostatic radiator valves
  • sophiecentaur
  • · Replies 8 ·
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8
Making a Giant Telescope Mirror Takes Years
  • Hornbein
  • · Replies 4 ·
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4
Lunar robots - AI guidance where low latency control is impossible
  • Al_
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2
Torque to turn a large Beam on a Rotisserie
  • Nick09
  • · Replies 14 ·
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14
Insights Remote Operated Gate Control System
  • Greg Bernhardt
  • · Replies 3 ·
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3
Bidet attachment not fully functioning
  • DaveC426913
  • · Replies 6 ·
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6
History of the trompe on French Wikipedia (very detailed)
  • Brian in Victoria BC
  • · Replies 2 ·
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2
Storage mechanism with locking and unlocking
  • magicfrog
  • · Replies 11 ·
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11
Li-Ion Battery Quality Report
  • DaveE
  • · Replies 16 ·
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16
Thermal mass flow sensor vs. thermal flux sensor
  • senmeis
  • · Replies 2 ·
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2
What mathematics software should engineering students use?
  • matqkks
  • · Replies 9 ·
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9
Engineering Olympiad Grades 9-12 (or recent graduates)
  • mad mathematician
  • · Replies 0 ·
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Engineering Disasters
  • Hornbein
  • · Replies 22 ·
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22
Why do all my clocks run slow?
  • greypilgrim
  • · Replies 4 ·
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4
I need a concave mirror with a focal length of 150 feet
  • gary350
  • · Replies 37 ·
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37
Unable to simulate bent structure in R soft Beamprop.
  • Chadeel
  • · Replies 1 ·
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1
How Do I Identify and Locate My Curb Stop Valve?
  • sevensages
  • · Replies 6 ·
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6
How can I find the cleanout for my building drain?
  • sevensages
  • · Replies 59 ·
2
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59
Is the curb box placed in the ground over the corporation stop? (plumbing question)
  • sevensages
  • · Replies 4 ·
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4
Software to convert images into perforated pattern
  • Tarun Tanwat
  • · Replies 4 ·
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4
Article about designing new fusion powerplants
  • sbrothy
  • · Replies 8 ·
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8
Mystery noise in flue (no, it's not a critter)
  • DaveC426913
  • · Replies 35 ·
2
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35
3"x3" steel tube, Structural engineering question
  • centerline
  • · Replies 12 ·
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12
Why speed limits don't matter
  • 256bits
  • · Replies 34 ·
2
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34
Issues with Apollo 11 TLI Simulation – Discrepancies in Return Orbit
  • UlrickAKobbeltvedt
  • · Replies 3 ·
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3
How to choose window fans to cool and dehumidify multi room 300 sq ft condo without air conditioning?
  • pane-rubrics
  • · Replies 8 ·
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8
What is the purpose of these things on this dam?
  • DDTJRAC
  • · Replies 21 ·
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21
Derivation of First Storey Shear Rigidity for a Rigid Frame
  • Tygra
  • · Replies 2 ·
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2
Do you think this is an early theft prevention device?
  • DDTJRAC
  • · Replies 1 ·
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1
How to stop/reduce ultrasonic sound wave device?
  • bluetuliphead
  • · Replies 38 ·
2
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38
Building a Home - when there are no trees
  • Tom.G
  • · Replies 1 ·
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1
Do you think this is an oil well, water well or what? (Tintype)
  • DDTJRAC
  • · Replies 10 ·
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10
The 41 second clock failure syndrome
  • anorlunda
  • · Replies 77 ·
3
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77
Wind gust duration to overturn a block
  • hillbilly63
  • · Replies 28 ·
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28
Drain water from 5" pipe buried 9ft underground
  • druidhr
  • · Replies 38 ·
2
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38
Rethinking infrastructure in flood prone areas
  • Astronuc
  • · Replies 56 ·
2
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56
Replacing asphalt used on speed bumps with non-Newtonian fluid?
  • overthinkingeinstein
  • · Replies 7 ·
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Calculating load for barn floor
  • FCStorm
  • · Replies 6 ·
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6
Baltimore's Francis Scott Key Bridge Collapses after Ship Strike
  • Borg
  • · Replies 293 ·
10
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293
What is the purpose of two units of mass in the Imperial system?
  • chrisbroward
  • · Replies 59 ·
2
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Student Recreates the Archimedes Death Ray
  • jedishrfu
  • · Replies 5 ·
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5
Is Electric Mining Equipment the Future of the Industry?
  • jack action
  • · Replies 2 ·
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2
Why Are My Bending Moment Signs Incorrect in the Direct Stiffness Method?
  • Tygra
  • · Replies 3 ·
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3
Can pressure differential close lateral window?
  • mantisshrimp23
  • · Replies 9 ·
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9
Where Should I Ask About Running a Thermal Conductivity Test for Soils?
  • Apexwolf
  • · Replies 2 ·
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2
Dam Failures and Infrastructure Damage in a Changing Environment
  • Astronuc
  • · Replies 8 ·
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8
Which Umbrella Base is Best for Windy Conditions?
  • Umbrella curious
  • · Replies 10 ·
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10
Rsoft BeamProp software - redeem my misery!
  • Haia
  • · Replies 2 ·
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2
Reliable CO2 Cartridge Puncturing for Horizontal Acceleration Test
  • bobfrancis1980
  • · Replies 10 ·
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10
Real World Tesseract
  • DaveC426913
  • · Replies 1 ·
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1
Rapidograph, technical drawing
  • user079622
  • · Replies 25 ·
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25
Would it be possible to make a self powered fan?
  • uncleoscy
  • · Replies 3 ·
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3
How much will my seaweed tanks heat up in the hot Indian summer?
  • seaweedfarmr
  • · Replies 9 ·
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9
Coastal Civil/Structural Engineering - Infrastructure Stability
  • Astronuc
  • · Replies 3 ·
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3
Quantitative Risk Assessment Of buried crude Oil Pipelines
  • DumpmeAdrenaline
  • · Replies 7 ·
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7
Set up a siphon with a vacuum pump for my seaweed cultivation tank?
  • seaweedfarmr
  • · Replies 4 ·
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4
Tesla starts "full self-driving" beta test - follow-up
  • jack action
  • · Replies 22 ·
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22
Quick release buckle strap with controllable release of tension
  • Robbwal199
  • · Replies 22 ·
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22
Why we rejected inclined (drafting style) table for studying?
  • user079622
  • · Replies 18 ·
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18
How to avoid gassing out from snowblower fumes
  • Greg Bernhardt
  • · Replies 27 ·
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27
Why Celebrate Engineer's Week with Cherry Pie?
  • ohwilleke
  • · Replies 2 ·
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2
Do you know the face of the physical unit you are using in your calculations?
  • difalcojr
  • · Replies 0 ·
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0
Derivation for modified sine curve equations
  • balaji19991
  • · Replies 6 ·
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6
Picking up on the discussion "Air build-up in a siphon system"
  • brad miley
  • · Replies 6 ·
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6
Small-scale hydropower generators installed in irrigation canals
  • berkeman
  • · Replies 5 ·
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5
Anyone know about "Superloads" in transportation?
  • DaveC426913
  • · Replies 12 ·
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12
Is EV Assist the Future of Semi-Trucks?
  • jack action
  • · Replies 8 ·
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8
Challenging the 'Insulation Protects Against Burst Pipes' Theory
  • kyphysics
  • · Replies 10 ·
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10
Sprinkle soil on the ice wall around driveway?
  • Greg Bernhardt
  • · Replies 7 ·
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7
Unusual Engineering Gadgets: Test Your Intuition and Share Your Pics!
  • berkeman
  • · Replies 19 ·
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19
I Made a Thing! (AKA where did the 'DIY projects' thread go?)
  • DaveC426913
  • · Replies 8 ·
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8
How To Convert Kvs-Value For Water To Kvs For Gas?
  • Falko
  • · Replies 3 ·
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3
Colour of engineering drawing board, sit or stand?
  • user079622
  • · Replies 24 ·
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24
Why do some hurdles come with adjustable bases?
  • berkeman
  • · Replies 19 ·
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19
Internal combustion engines founded in GBR and car industry collapse
  • user079622
  • · Replies 48 ·
2
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48
Asking for advice about filing for a patent on a new device
  • hagopbul
  • · Replies 12 ·
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12
Why are MRI machines so expensive to operate?
  • LightningInAJar
  • · Replies 53 ·
2
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53
Effect of downward force on cantilevered object
  • nezednemo
  • · Replies 9 ·
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9
What Is the Core of a Section in Eccentric Loading?
  • morpheus343
  • · Replies 1 ·
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1
Can a type K thermocouple be used with cryo?
  • jonhswon
  • · Replies 4 ·
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4
Are electric cars over engineered?
  • Robotrium
  • · Replies 7 ·
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7
What does Damage Equivalent Load (DEL) mean?
  • LT72884
  • · Replies 1 ·
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1
Impact force reduction after passing through a medium
  • boyboy400
  • · Replies 4 ·
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4
Why is a Big Back Advantageous for Delivering Mechanical Power?
  • Username34
  • · Replies 23 ·
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23
Applying pressure for clearing land mines
  • ferchotous
  • · Replies 42 ·
2
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42
For fun: How big of a Microscope is needed to see a Planck Length?
  • DynV
  • · Replies 18 ·
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18
How Do I Calculate Actual Frequency from Wind Turbine Simulation Data?
  • LT72884
  • · Replies 11 ·
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11
Engineering Cadre: Engineer, Technologist, Technician, Artisan/Craftsman
  • DeBangis21
  • · Replies 4 ·
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4
Does anyone know how this motor from Quantum Energy works?
  • CWatters
  • · Replies 2 ·
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2
An engineer's approach to the quadratic formula
  • DaveE
  • · Replies 3 ·
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3
Decompressing through an underwater horn shaped tunnel
  • Jimijel
  • · Replies 6 ·
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6
More than one camera necessary for movement analysis?
  • makamo66
  • · Replies 6 ·
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6
When is the distinction between science fields applicable?
  • random_soldier
  • · Replies 5 ·
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5
Selling Older 3D Printer: Tips & Advice
  • LightningInAJar
  • · Replies 2 ·
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2
How Can Expedited Permits Unlock 2000 Gigawatts of Clean Energy?
  • kuruman
  • · Replies 2 ·
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2