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bible.exeWelcome to BurntSemiconductor! Join me as I explore electronics, retro computing, and hands-on DIY projects. Check out the YouTube channel for more cool content! If you want to reach out to me the best way is through youtube comments. I do read them and love to hear from you!
dtmf.exeTrunk signals
Coin signals
Sequence
Input rules: plain characters 0-9 * # A B C D are DTMF. Use bracketed tokens for non-DTMF: [KP], [ST], [2600], [N] or [NICKEL], [DI] or [DIME], [Q] or [QUARTER]. Tokens can be mixed, eg: 1800[KP]5551212[ST][Q].
dtmfd.exeTiming
Log
Help
Controls
- Min ms: tone must persist this long.
- Guard: silence time before next digit.
- Frames: consecutive frames required.
- Trunk/Coin: enable legacy KP/ST/2600/coin; noisy on ambient mics.
Levels
morse.exeInput
Ctrl+Enter also plays
Visualizer
?
Controls
600
120
3
1
3
7
linkz
calc.exeConductors
Qty Type Size (AWG) Dia (in) Area (in²)
Conduit
Fill % auto-uses NEC: 1 cond=53%, 2=31%, 3+=40%, nipple=60%.
Results
Conductors0
Total Area--
Allowed Area--
Usage--
Conductors & Devices
Qty Wire Size (AWG) Dia (in) Area (in²) Type
Box
Results
Items0
Total Volume--
Box Volume--
Usage--
Ohm's Law / DC Power
AC Power
Real (P)--
Apparent (S)--
Reactive (Q)--
PF--
Inputs (IEEE 1584-2002 style)
Quick NFPA 70E helper using legacy IEEE 1584-2002 equations (enclosed vs open air). For study-grade numbers run a formal arc-flash study.
Results
Arcing Current--
Incident Energy @ WD--
Arc-Flash Boundary--
PPE Hint--
Boundary uses the target incident energy (default 1.2 cal/cm²). Calculations assume 208 V–15 kV, gaps 3–152 mm, clearing times 0.01–2 s, and are informational only. NOT TO BE USED FOR SAFETY OR PPE PLANNING. FOR FUN ONLY.
Source Inputs
Calculates available symmetrical fault current at the transformer secondary. Motor factor adds % of transformer contribution to mimic motor backfeed. Utility MVA adds upstream source stiffness in parallel. Override kA bypasses transformer math.
Downstream Run (to load panel)
Uses positive-sequence conductor impedance scaled by one-way length. Add length for feeders from source to panel; ground path not modeled separately. Override R/X if you have exact data.
Results
Upstream Fault--
Panel Fault--
Panel Sym. MVA--
Total %Z--
Notes--
Resonant Lengths
¼-wave--
½-wave--
⅝-wave--
Inverted-V ½-wave--
Loaded / Shortened Vertical
Missing Length--
Coil Inductance--
Turns (Wheeler)--
Simple L-Match (R+jX to 50Ω)
Topology--
Series Reactance--
Shunt Reactance--
Feedline Effects
Loss @ freq--
Delivered Power--
Shack SWR--
