Tag Archives: calculator

AtPack: Atmel Pack parser, visualizer and fuse calculator

AtPack – Atmel Pack parser, visualizer and fuse calculator from Vagrearg:

Looking for an up-to-date fuse-calculator for the Atmel(*) AVR chips has been something of a long search. There are several online versions, but they have not been updated to the new chips (like the ATmega328PB).
When you have got an itch, you simply scratch it… Don’t you?
Well, I did, and it resulted in an analysis of the Atmel Pack format, which can be freely downloaded under an Apache 2.0 license. The AtPacks contain a master XML file with device lists and links to each device’s XML file, which in turn describes the entire chip. The format is not that hard to understand and can be easily mangled into something useful. Then, some crude jQuery hacking and many hours later… you know how that works.

AtPack: Atmel Pack parser, visualizer and fuse calculator – [Link]

ElectroCalc – Electrical and Electronics Calculator

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“Tiago” tipped us with his latest Android App. His app, ElectroCalc is a fast calculator for electrical and electronic circuits. The calculator includes many tools and comes in a free and a Pro version. Check it out!

ElectroCalc – Electrical and Electronics Calculator – [Link]

AriCalculator – A homemade handheld calculator

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The AriCalculator is a DIY calculator or a general purpose handheld device.

It is battery powered and runs on a NXP S12G240 microcontroller (16-bit, 240k flash, 11k RAM). The device has 38 input keys and a 128×64 pixel LCD display with a backlight option. Three interfaces connect the calculator to the outside world:

  • A BDM debug interface, giving direct access to the microcontrollers on-chip memories and debug features.
  • A USB port, offering a FTDI virtual com port (VCP). This port is under software control and intended to serve as a programming interface.
  • A general purpose SPI port, intended for hardware extensions.

AriCalculator – A homemade handheld calculator – [Link]

RC snubber calculator spreadsheet

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Paulo has developed an Excel-based calculator that eases the design of RC snubbers in power switching applications:

In power switching applications, a designer often has to contend with spurious oscillations. These are the result of parasitic capacitances and inductance on the board and behave like the step response of an RLC circuit. These transients can induced undesired noise in neighboring circuits and create over voltage spikes that can compromise long term component reliability.

RC snubber calculator spreadsheet – [Link]