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  • About the Author
  • Projects
    • 2019 DIY Vacuum Tube Watch EVERGLOW V2.1
    • 2019 DIY Analog Curve Tracer
    • 2014 DIY PIP-Watch
    • 2010 DIY Talking Clock
    • 2013 SMECY (at UTIA)
    • 2012 ADVANCE (at HWU)
    • 2011 Apple-CORE (at UTIA)
  • Blog Posts
2

Initial release of mywayback

Posted on February 27, 2021 by Jarda

Mywayback is a complete rewrite of my previous timeback archival tool. It is now available on the github: https://github.com/jsyk/mywayback Main features: Python 3.x in Windows (with NTFS-only) and Linux. Requires the package sortedcontainers. Automatic deduplication of source files using SHA256… Continue Reading →

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Engineers’ Tribute, and a handy wire gauge chart by PEI-Genesis

Posted on September 22, 2020 by Jarda

Engineers’ Tribute is an endless well of electronic technology sites, perfectly suited for studying during long winter evenings (or lockdowns.. 🙂 ) Checkout this handy wire-gauge chart made by PEI-Genesis. The download link is right at their front page:

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0

Premonitions from 2019

Posted on November 19, 2019 by Jarda

Bad sleep last night brought me ideas, and since we’ve got a situation down here in Siemens, the topic was not unexpected: CRISIS STARTSAS UBER FALLS. and NO CORRECTIONBEFORE TRUMP’SRE-ELECTION. Let time travelers from 2020 and beyond let us know… Continue Reading →

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Release of my Vacuum Tube Watch “EVERGLOW” v2.1

Posted on October 19, 2019 by Jarda

The Vacuum Tube Watch project is now released in version V2.1 “EVERGLOW”. Go see it via the “Projects” menu above. Enjoy!

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2

ATtiny’s UPDI interface activates permanently upon noise input!?

Posted on August 25, 2019 by Jarda

UPDI – Unified Program and Debug Interface – is the new programming and debugging interface on new ATtiny MCUs from Microchip. The UPDI requires just a single pin on the MCU, so it is very suitable for low-pin count chips.… Continue Reading →

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1

Inexpensive Adafruit SMT Breakout boards (SOIC, TSSOP, MSOP) from a PCB Panel

Posted on June 15, 2019 by Jarda

I created a smal 100x100mm PCB mini-panel of some of the SMT breakout boards from Adafruit. Each mini-panel contains: 3x SOIC-20 (A-side) and TSSOP-20 (B-side) 5x SOIC-16 (A-side) and TSSOP-16 (B-side) 5x SOIC-8 (A-side) and MSOP-8 (B-side) 4x SOIC-8 (A-side)… Continue Reading →

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Release of the DIY Curve Tracer Project

Posted on April 25, 2019 by Jarda

Here you can find documentation about my DIY Analog Curve Tracer.

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8

Cheap AVR UPDI Programmer from ATtiny817 Xplained Mini

Posted on April 16, 2019 by Jarda

New AVR processors from Microchip/Atmel use a 1-wire UPDI interface for flash programming. You could use either AVR ICE or Pickit 4 as the “official” programmers (I did not test any of them). Both of these cost >50 EUR. A… Continue Reading →

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1

PN7120 won’t not respond on the I2C bus unless CORE_RESET_CMD is sent in <1sec after power-up

Posted on August 3, 2018 by Jarda

NXP’s PN7120 is NFC controller for contactless communication at 13.56MHz. It interfaces with the host CPU via the I2C bus. The I2C slave address of  PN7120 is 0b010100Lx, where L is a configurable LSB of the address (by pin B2,… Continue Reading →

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0

The Tale of a GCC Upgrade

Posted on January 21, 2018 by Jarda

Once upon a time, I decided it is a good time to upgrade the version of gcc compiler we use in our ARM926-based firmware project. Historically, this project uses gcc version 4.6, which is quite outdated nowadays (January 2018). In… Continue Reading →

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Recent Posts

  • Initial release of mywayback
  • Engineers’ Tribute, and a handy wire gauge chart by PEI-Genesis
  • Premonitions from 2019
  • Release of my Vacuum Tube Watch “EVERGLOW” v2.1
  • ATtiny’s UPDI interface activates permanently upon noise input!?

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