PCB Toolkit vs VHDL Ref Usage & Stats

You can use this PCB Toolkit for iOS to calculate: - Maximum conductor length / bandwidth (Hammerstad/Jensen & IPC) - Conductor Impedance (also differential precise calculation by Kirschning/Jansen & IPC calculation) - Via properties - Via θ (Thermal resistance), and for a via array (IPC) - Low Pass Π-filter - Fusing current (Preece, Brooks & Onderdonk) - Maximum current or width for a trace (IPC-2521 and IPC-2221) - Electrical clearance (IPC2221B) - Pull Up calculator I2C And now also: - LED Resistor Calculator - Mounting Hole Info - Nearest E-Series Resistor Calculator (Solo/Serie/Parallel) - Resistor Tolerance / Alpha Viewer - Via Stitching Calculator - Cload Calculator (XTAL) And also links to standard house stackups of JLCPCB, PCBWAY and Aisler are included. I will add more calculations with updates. (One time buy, so you will get these updates without additional charge later) I am also open to feature requests. The app supports light mode, dark mode, portrait & landscape mode and zoomed-in display.

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VHDL Ref

A quick reference manual for the two most popular Hardware Description Languages (HDL): VHDL and Verilog. This app is written by engineers, for engineers. For every construct in VHDL, provides the equivalent in Verilog, and vice-versa. Experienced custom digital logic designer for FPGA or ASIC? Electrical engineering student just learning the ropes? This app is for you. + Searchable dictionary of every keyword, operator, and data type for both languages. + Handbook provides simple example for every single reference + Common functions in each language + All pre-defined attributes for VHDL + All primitive gates and drive strengths for Verilog + Filter by language (VHDL, Verilog, or both) + Filter by language elements (keywords, operators, attributes, data types, etc.)