Plasma Table Arduino THC: Board Overview

Upshot: A thorough look at the PCB for my Arduino based torch height controller, for my LinuxCNC plasma table build.

Topic index: 00:00 - Intro 02:54 - Tips on designing, building & KiCAD 06:52 - How a THC works, my Hypertherm, voltage dividers & adjusting for your plasma 12:30 - RC lowpass filter, Thevenin's theorem & picking a capacitor 21:05 - Other components (linear regulators, power supplies, and optocouplers) 30:12 - A couple notes on not breaking your stuff/electrocuting yourself 32:17 - Potential improvements, other quirks, stuff that didn't work, stuff you could change 44:24 - Digging into the wiring/schematic, LM317, PC817 66:33 - Looking at the PCB layout & finale

Here's a permalink where you'll find the schematics shown later in the video. Note that updated versions may be available if you check the latest version of the repository. https://github.com/swolebro/swolebro-youtube/tree/cbd3e804a06677a460798404d5a60d336f19baf5/arduino-thc

The latest version of the repo, with extra LinuxCNC stuff and more: https://github.com/swolebro/swolebro-youtube/

Here's the full plasma build series: https://www.youtube.com/playlist?list=PL9xPdBFt5g3Q6TkuhhfQmQNm6TdvNkPuX

Just Arduino stuff: https://www.youtube.com/playlist?list=PL9xPdBFt5g3SHT1WvcGovHCzQ3Ag_kZeZ

Your donations help me make more cool shit: http://paypal.me/swolebroshopworks

Other YouTube channels: Contextual Electronics: https://www.youtube.com/user/contextualelectronic CE's Getting to Blinky 5.0: https://www.youtube.com/watch?v=BVhWh3AsXQs&list=PLy2022BX6EspFAKBCgRuEuzapuz_4aJCn EEVblog: https://www.youtube.com/user/EEVblog All About Electronics: https://www.youtube.com/channel/UCBkOVp1Cqz4MR0LYR8vKpZg

Some wiki links (blame YouTube for automatically inserting the awful URL redirects) https://en.wikipedia.org/wiki/Ohm%27s_law https://en.wikipedia.org/wiki/Resistor https://en.wikipedia.org/wiki/Voltage_divider https://en.wikipedia.org/wiki/Low_pass_filter https://en.wikipedia.org/wiki/RC_circuit https://en.wikipedia.org/wiki/RC_time_constant https://en.wikipedia.org/wiki/Cutoff_frequency https://en.wikipedia.org/wiki/Th%C3%A9venin%27s_theorem https://en.wikipedia.org/wiki/Network_analysis_(electrical_circuits) https://en.wikipedia.org/wiki/Linear_regulator https://en.wikipedia.org/wiki/Opto-isolator https://en.wikipedia.org/wiki/Operational_amplifier https://en.wikipedia.org/wiki/Operational_amplifier_applications#Voltage_follower_(unity_buffer_amplifier) https://en.wikipedia.org/wiki/LM317

A RC lowpass filter calculator: http://sim.okawa-denshi.jp/en/CRtool.php ... https://www.youtube.com/watch?v=lkKd5P8oH5Q