MuffinTerm vs Inductor Calculator Master

MuffinTerm: A terminal crafted for the classic BBS experience. Dive back into the glory days of dial-up bulletin board systems… just, without the dialing up. (Though we’ll always miss that modem sound.) BBSes were once the way that almost anyone “online” got online. The modern Internet might have stolen a bit of the spotlight, but BBSes are still around if you know where to look—and MuffinTerm can take you there. Connect to telnet-enabled BBSes from around the world, with a terminal that’s designed to bring the classic experience to devices of today. (And no more busy signals!) Select from among text modes and terminal hardware of the DOS and home computer era, with pixel-accurate CP437, PETSCII, and ATASCII support for the popular systems of the day, reproduced in exacting detail to help you really feel at home. (All rendered with a custom Metal shader—it is the 21st century, after all.) • MDA with white (P4), green (P31), or amber (P3) phosphor • CGA in 40- or 80-column mode • EGA in 25- or 43-line mode • VGA in 25- or 50-line mode • VIC-II (C64/PETSCII) in NTSC, PAL, or borderless mode • ANTIC (ATASCII) in NTSC, PAL, or borderless mode Fuel your nostalgia further by enabling various aesthetic effects: • Simulated modem speed — from the 110cps teletype crawl of the 1970s to the “blazing fast” 56K of the awesome ’90s. Slow down that ANSI animation to look the way it was originally intended, or just relive the feel of watching the bytes roll in. (Fortunately, without the cross-town toll charges this time around.) • CRT curvature — Turn your flat-screen device into the spitting image of a classic ’tube. • Scan lines — Reject the modernity of your perfect high-DPI display and embrace the scanlines that once reigned supreme. • Warm tube tint — Harken back to an era of dubiously calibrated picture tubes and iffy RF adapters. • VIC-II luma bars — Relive the experience of poorly isolated clock lines (and the resulting visual artifacting). • Overscan borders — View the terminal as it would appear on a typical TV, or flout the factory calibration and show the full borders of the display field. • Select a custom app icon from among several inspired by modems of the BBS era (plus a couple of floppy disks). Some features are functional as well as fun. For example, who hasn’t stuck a sticky note or two to the side of their monitor at some point? Fortunately, the digital era is no bar to this ancient practice. Each BBS in your dialing directory gets its own digital sticky note (pick a color!), plus another that’s shared between them all. Record notes, make reminders, or be naughty and jot down a password or two. (We won’t peek.) Of course, the basics are still all there. Traditional ANSI, PETSCII, and ATASCII terminal emulation give you the proper BBS experience; teletype (TTY) and “raw mode” provide support for special-use systems. Upload and download files using the standard XMODEM, YMODEM, and ZMODEM protocols. Save transcripts of your calls as text or raw data logs. There’s even a session timer in the status line to show you how long you’ve been connected. (Not responsible for flashbacks to long-distance bills from the 1980s.) A comprehensive dialing directory helps you to keep track of your favorite systems. You can also import up-to-date BBS lists from popular online BBS directories. Have multiple devices? Automatically sync your dialing directory and call history between them all—whether iOS, iPadOS, and macOS—via iCloud. And last but not least, it’s free. No ads, no in-app purchases, no weird tracking shenanigans. It’s just you and the soft glow of the pixels calling out to you. It’s time to get back online with MuffinTerm.

Inductor Calculator Master is the most complete offline coil calculator for electronics engineers, RF hobbyists, audio builders, and students who work with inductors every day. No internet. No accounts. No guesswork. Enter your coil dimensions and get accurate results instantly — whether you are in the workshop, in the field, or somewhere with no signal at all. WHAT YOU CAN CALCULATE 1. Air Core Solenoid Calculate inductance, wire length, and DC resistance for single-layer air-core coils. Supports both mm and inch units. Includes a coil diagram and practical winding tips from the electronics community. 2. Multi-Layer Coil Handle multi-layer windings using the correct multi-layer Wheeler formula. The app automatically warns you when your geometry would make a single-layer formula unreliable. 3. Toroid — Two Methods AL Value Method: enter the core's AL value and number of turns to get inductance. Physical Dimensions Method: enter outer diameter, inner diameter, height, and relative permeability to get inductance. Both methods output wire length and DC resistance. 4. LC Resonant Circuit Enter inductance and capacitance to get resonant frequency. Or enter target frequency and capacitance to find the required inductance. Instantly check whether your LC tank circuit hits the right frequency. BUILT FOR REAL WORKFLOWS 1. Target Solver Know your target inductance? Enter it along with your coil geometry and the app tells you exactly how many turns to wind — no trial-and-error, no spreadsheets. Supports Air Core, Multi-Layer, Toroid AL, and Toroid Physical modes. 2. Correct My Coil Wound a coil that measures the wrong value on your LCR meter? Enter your measured inductance, your target inductance, and the current number of turns. The app calculates precisely how many whole turns to add or remove. 3. Compare 2 Designs Enter two Air Core configurations side by side and compare their inductance, wire length, and DC resistance in a single view. Faster than switching between tabs and recalculating manually. 4. Save to History Every calculation can be saved and recalled later. All inputs and outputs are preserved exactly as you entered them — no re-entering values across sessions. EVERY RESULT INCLUDES - Inductance displayed in auto-scaled units (H, mH, µH, or nH) - Wire length required for the complete winding - DC winding resistance - Confidence rating (High, Medium, or Low) based on how well your geometry fits the formula's valid range - Geometry-specific warnings when inputs fall outside ideal formula boundaries - Real-world winding tips drawn from electronics community experience 100% OFFLINE All calculations run entirely on your device. No data is ever sent to a server. The app works anywhere — workshop bench, shack, stockroom, or a metal building that kills your signal. PRICING - Free: All four main calculators (Air Core, Multi-Layer, Toroid, LC Resonant). Unlimited calculations, no time limits. - Remove Ads — $0.99: Removes the banner ad from every screen. One-time purchase, no subscription. - Premium — $1.99: Unlocks Quick Tools — Target Solver, Correct My Coil, and Compare 2 Designs. One-time purchase. Restore Purchases is fully supported. WHO IT IS FOR Amateur radio operators building tank circuits, filters, and matching networks. Audio engineers designing speaker crossover inductors. Power supply designers specifying filter chokes. Students studying electromagnetic induction and RF theory. Makers and hobbyists winding anything from custom sensors to coilgun stages. If you wind wire around a form, this app belongs on your phone.