Tools & Calculators

ASK Arron:
This is one of the best list of FAQ’s around:
http://runamok.tech/AskAaron.html

Electrical Calculators:

http://www.calculatoredge.com/index.htm#electrical

Materials Weight Calculators:
http://asm.matweb.com/tools/weight-calculator.asp
http://www.calculatoredge.com/matweight/material%20wt.htm  <— This has many other calculators.

Combat Robotics Tools
Torque / Amp-Hour Calculator, Tap and Drill Chart, Chain / Sprocket Calculators, Tank Drive setup DX6i, Lipo Wiring. http://www.killerbotics.com/kbtools/

Simple Metric Conversions Tools ( Inches to Milimeters and others)
https://www.metric-conversions.org/length/inches-to-millimeters.htm