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  • Small project #12 — IKEA Samtid mood-light upgrade | My 2µF
    feel like paying that Especially so as the control boards are very small fit into dead space of the main board and therefore would ve reduced waste I submitted 2 jobs with DirtyPCBs main board control board had everything shipped with DHL and still ended up paying about 25 bucks less We like that Bottom side of the board which will be facing downwards in the lamp The control board is simply piggybacked onto it with microMaTch board to board connectors The main reasons for choosing them was low profile availability You can see the footprints for the level shifting MOSFET circuitry between the board to board connector footprints Another reason for using a daughter board was that for some reason I had miscalculated total current consumption I read somewhere that the WS2812B can take up to 60mA when fully on so I would ve ended up with about 4A I did everything I could to keep the power planes as wide and undisturbed as possible Now that I have the real thing sitting on my desk it only takes 2 5A max go figure Top side which will be facing towards the ceiling The circuit boards fit nicely over the Samtid s E27 socket Phew A spacer plastic cardboard is required to get a bit of distance between the circuit board and the metal rods holding the lamp shade It has come to my attention that later Samtid models have a somewhat different arrangement for holding the shade so I ll have to make a field trip to my local IKEA shop and take some measurements I hope my board still fits the later models Size comparison between SK84 8A 40V and SS14L 1A 40V Schottky diodes The very first thing I assembled was the control board the most difficult part of this project due to the ATmega168PA s QFN32 package Quite tiny It worked out OK using hot air and my soldering iron for touch up However I must have been quite blind or at least severely distracted DOH After having fixed that inexcusable blunder it looks like this The microMaTch connectors interfere with the switches a bit and I didn t get it quite right here The interfering pins must be absolutely flush with the circuit board Will be fixed later And the chip survived There was a slight problem when programming the ATmega168PA I was getting device signature mismatches all the time In the end I discovered that the bootloader I used had been compiled for the ATmega168 and therefore reported a different signature than the ISP programmer That was fixed by recompiling optiboot for the PA variant This custom bootloader is part of the code repo for this project 16MHz Control board fully assembled Starting to assemble the level shifter isolation circuit 2x BSS138 n ch MOSFET 1 5k pull up resistors The slotted pads were supposed to help with alignment of the microMaTch connectors It worked out OK Board to board connectors added to

    Original URL path: http://blog.spitzenpfeil.org/wordpress/2014/08/16/small-project-12-ikea-samtid-mood-light-upgrade/ (2016-02-10)
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  • Small project #13 — AVR-ISP level shifter (VCC+I/O) | My 2µF
    all it works Design files and so forth can be found here This entry was posted in Electronics and tagged 3 3V 5V adapter AVR ISP level shifter Bookmark the permalink Small project 12 ⅔ IKEA Samtid mood light BT firmware Small project 14 KIS 3R33S breakout with citrus smell Leave a Reply Cancel reply Your email address will not be published Required fields are marked Comment Notify me of followup comments via e mail Name Email Website Leave this field empty CAPTCHA Code Search for Recent Comments robert on YauDL Y et a nother u seless D ummy L oad Andrew Duckworth on YauDL Y et a nother u seless D ummy L oad robert on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Archives Archives Select Month January 2016 1 December 2015 2 November 2015 3 October 2015 2 September 2015 10 July 2015 4 June 2015 5 May 2015 2 April 2015 5 March 2015 3 February 2015 2 January 2015 1 December 2014 2 November 2014 2 October 2014 3 September 2014 1 August 2014 2 July 2014 2 June 2014 2 May 2014 2 April 2014 4 March 2014 3 February 2014 2 January 2014 1 December 2013 3 November 2013 6 October 2013 3 August 2013 3 July 2013 2 June 2013 6 May 2013 6 February 2013 2 January 2013 5 December 2012 1 August 2012 2 July 2012 7 June 2012 6 May 2012 5 April 2012 6 March 2012 2 February 2012 1 January 2012 3 December 2011 5 October 2011 2 September 2011 1 August 2011 1 July 2011 3 June 2011 1 March 2011 2 February 2011 5 January

    Original URL path: http://blog.spitzenpfeil.org/wordpress/2015/05/09/small-project-13-avr-isp-level-shifter-vccio/ (2016-02-10)
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  • Small project #14 — KIS-3R33S breakout — with citrus smell ! | My 2µF
    gloves liquid soap and IPA to remove it thoroughly Assembly was straight forward with two notable exceptions 1 as the board is pretty packed with parts it was NOT advantageous to solder the trimmer first NO ACCESS to the capacitor Removing the trimmer resulted in some superficial heat damage to it hot air gun I ended up using ChipQuik low melt solder 2 having placed the trimmer and capacitor first almost blocked access to half of the pads of the DC DC module KIS 3R33S Again I was saved by proper gear Fortunately my Weller WSM 1 comes with an exceptionally tiny WMRP soldering pen 2mm chisel type Result of a short superficial test voltage adjustment no load works as expected Glamour shot A bit of testing Output voltage AC ripple no load 20mV div Not too bad Output voltage AC ripple 3A load 20mV div Not too bad Input voltage AC ripple 3A load 200mV div Typical for buck current ramping up and down A meter scope Test setup Power is supplied by a 12V lead acid battery off camera due to size Yes the wires are a bit thin I just wanted to see if the device would release the magic blue smoke didn t happen Design files and so forth This entry was posted in Electronics and tagged DC DC KIS 3R33S mod power supply Bookmark the permalink Small project 13 AVR ISP level shifter VCC I O Still at war with customs yet another letter from the HZA Leave a Reply Cancel reply Your email address will not be published Required fields are marked Comment Notify me of followup comments via e mail Name Email Website Leave this field empty CAPTCHA Code Search for Recent Comments robert on YauDL Y et a nother u seless D ummy L oad Andrew Duckworth on YauDL Y et a nother u seless D ummy L oad robert on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Archives Archives Select Month January 2016 1 December 2015 2 November 2015 3 October 2015 2 September 2015 10 July 2015 4 June 2015 5 May 2015 2 April 2015 5 March 2015 3 February 2015 2 January 2015 1 December 2014 2 November 2014 2 October 2014 3 September 2014 1 August 2014 2 July 2014 2 June 2014 2 May 2014 2 April 2014 4 March 2014 3 February 2014 2 January 2014 1 December 2013 3 November 2013 6 October 2013 3 August 2013 3 July 2013 2 June 2013 6 May 2013 6 February 2013 2 January 2013 5 December 2012 1 August 2012 2 July 2012 7 June 2012 6 May 2012 5 April 2012 6 March 2012 2 February 2012 1 January 2012 3 December 2011 5 October 2011 2 September 2011 1 August 2011 1 July 2011 3 June 2011 1 March 2011 2 February 2011

    Original URL path: http://blog.spitzenpfeil.org/wordpress/2015/05/20/small-project-14-kis-3r33s-breakout-with-citrus-smell/ (2016-02-10)
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  • Small project #5 — Pentax s5z LED ring for macro shots | My 2µF
    a boost converter so I could run it off 3V 2x AA cells or a LiPo but due to the limited space and my single side load requirement that idea was scrapped In the end I went for the simplest solution and ignored energy efficiency and so forth That also keeps the part cost down This entry was posted in Electronics and tagged AVR camera digital illumination LED light macro Pentax S5z Bookmark the permalink Small project 4 Serial Knob Soldering iron tip erosion Weller WMRP RT3 Leave a Reply Cancel reply Your email address will not be published Required fields are marked Comment Notify me of followup comments via e mail Name Email Website Leave this field empty CAPTCHA Code Search for Recent Comments robert on YauDL Y et a nother u seless D ummy L oad Andrew Duckworth on YauDL Y et a nother u seless D ummy L oad robert on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Archives Archives Select Month January 2016 1 December 2015 2 November 2015 3 October 2015 2 September 2015 10 July 2015 4 June 2015 5 May 2015 2 April 2015 5 March 2015 3 February 2015 2 January 2015 1 December 2014 2 November 2014 2 October 2014 3 September 2014 1 August 2014 2 July 2014 2 June 2014 2 May 2014 2 April 2014 4 March 2014 3 February 2014 2 January 2014 1 December 2013 3 November 2013 6 October 2013 3 August 2013 3 July 2013 2 June 2013 6 May 2013 6 February 2013 2 January 2013 5 December 2012 1 August 2012 2 July 2012 7 June 2012 6 May 2012 5

    Original URL path: http://blog.spitzenpfeil.org/wordpress/2013/05/02/small-project-5-pentax-s5z-led-ring-for-macro-shots/ (2016-02-10)
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  • Index of /arduino
    1 0 6 windows zip 07 Nov 2014 13 41 93M arduino 1 6 7 linux32 tar xz 17 Dec 2015 16 28 92M Latest Linux 32bit release arduino 1 6 7 linux64 tar xz 17 Dec 2015 16 32 91M Latest Linux 64bit release arduino 1 6 7 macosx zip 22 Dec 2015 12 41 136M Latest Mac OSX relaease arduino 1 6 7 windows exe 17 Dec 2015

    Original URL path: http://blog.spitzenpfeil.org/arduino/ (2016-02-10)
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  • 8×8 RGB Matrix V2 – KICAD test | My 2µF
    000020 N 000021 N 000022 N 000023 N 000024 N 000025 N 000026 N 000027 N 000028 N 000029 N 000030 N 000031 N 000032 N 000033 N 000034 N 000035 N 000036 N 000037 N 000038 N 000039 N 000040 N 000041 N 000042 N 000043 N 000044 N 000045 N 000046 N 000047 N 000048 N 000049 N 000050 N 000051 N 000052 N 000053 N 000054 N 000055 N 000056 N 000057 N 000058 N 000059 N 000060 N 000061 N 000062 N 000063 N 000064 N 000065 N 000066 N 000069 N 000070 N 000071 N 000072 circuit use via Via 0 1 45 25 mil rule width 20 and copy and insert it before itself Remove all other net names except GND and VCC Then change width 20 to e g width 48 and kicad default to kicad power This will tell the autorouter to route the tick power nets before all the signal networks The hacked part looks like this class kicad power GND VCC circuit use via Via 0 1 45 25 mil rule width 48 class kicad default N 000001 N 000002 N 000003 N 000004 N 000005 N 000006 N 000007 N 000008 N 000009 N 000010 N 000011 N 000012 N 000013 N 000014 N 000015 N 000016 N 000017 N 000018 N 000019 N 000020 N 000021 N 000022 N 000023 N 000024 N 000025 N 000026 N 000027 N 000028 N 000029 N 000030 N 000031 N 000032 N 000033 N 000034 N 000035 N 000036 N 000037 N 000038 N 000039 N 000040 N 000041 N 000042 N 000043 N 000044 N 000045 N 000046 N 000047 N 000048 N 000049 N 000050 N 000051 N 000052 N 000053 N 000054 N 000055 N 000056 N 000057 N 000058 N 000059 N 000060 N 000061 N 000062 N 000063 N 000064 N 000065 N 000066 N 000069 N 000070 N 000071 N 000072 circuit use via Via 0 1 45 25 mil rule width 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 class kicad power GND VCC circuit use via Via 0 1 45 25 mil rule width 48 class kicad default N 000001 N 000002 N 000003 N 000004 N 000005 N 000006 N 000007 N 000008 N 000009 N 000010 N 000011 N 000012 N 000013 N 000014 N 000015 N 000016 N 000017 N 000018 N 000019 N 000020 N 000021 N 000022 N 000023 N 000024 N 000025 N 000026 N 000027 N 000028 N 000029 N 000030 N 000031 N 000032 N 000033 N 000034 N 000035 N 000036 N 000037 N 000038 N 000039 N 000040 N 000041 N 000042 N 000043 N 000044 N 000045 N 000046 N 000047 N 000048 N 000049 N 000050 N 000051 N 000052 N 000053 N 000054 N 000055 N 000056 N 000057 N 000058 N 000059 N 000060

    Original URL path: http://blog.spitzenpfeil.org/wordpress/2009/02/24/8x8-rgb-matrix-kicad/ (2016-02-10)
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  • My 2µF | "Another visitor! Stay a while. Staaaaay, FOREVER!" | Page 3
    RGB LED and works just fine with Adafruit s NeoPixel library The concept is once again rather simple Whack a lot of WS2812B RGB LEDs onto a small board add an ubiquitous Arduino core and make sure everything fits nicely and works Well it worked Continue reading Posted in Arduino Tagged IKEA lamp light lighting mood light RGB Samtid upgrade 7 Comments KiCad BZR5025 full windows installer Posted on July 28 2014 by robert Someone on the KiCad mailing list has created a windows installer of the BZR5025 code base including libraries demo projects docs I ve mirrored it on my server for your convenience KiCad downloads Please note that this version uses library tables and the new pretty footprint format It also uses the new version 4 board format which is not backward compatible Boards saved with this version cannot be opened with older KiCad releases before BZR4958 Please take the usual precautions when working on boards that are dear to you make backups and use a decent version control software git comes to mind so you can easily roll back if something goes wrong Commit frequently You may want to look into using a virtual machine VirtualBox VMware for testing these releases Posted in Electronics Software Tagged installer kicad windows 6 Comments Small project 11 674 Posted on July 1 2014 by robert Don t you just hate it when you run out of holes and have to use a bridge wire to some free patch on the proto board I thought so Continue reading Posted in Soldering PCBs Tagged board breadboard iteadstudio PCB perfboard prototype 2 Comments Small project 10 IKEA Samtid reading light upgrade Posted on June 22 2014 by robert Yet another reincarnation of a PT4115 based LED lamp This time I chose to add a micro controller to the mix No not an ATtiny13 but an ATtiny45 as it contains a much desired feature for this job high frequency PWM using an on board PLL clock multiplier An ATtiny25 would ve been plenty but the 45 was cheaper Go figure Continue reading Posted in Electronics Tagged IKEA light mod reading Samtid upgrade Leave a comment Sunday Teardown Soy milk maker Posted on June 15 2014 by robert First a word of warning Stay clear of any soy products They can seriously fuck up your health You don t want to go down that road I m proud to say that by means of this here tear down I ve transformed this kitchen appliance into a much safer state I ll transport the remains to my local recycling center tomorrow minus a couple of parts that went into storage Continue reading Posted in Electronics Tagged at ATmel kitchen appliance PLD soy milk teardown 2 Comments KiCad Interactive Router release version Posted on May 21 2014 by robert Use BZR 4875 or later if you try out the new features Posted in Electronics Tagged CERN kicad layout openGL PCB push router shove Leave a comment How

    Original URL path: http://blog.spitzenpfeil.org/wordpress/page/3/ (2016-02-10)
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  • HZA — Won the battle, but not the war | My 2µF
    agency Gewerbeaufsichtsamt and was interviewed regarding the nature of the WS2812B LEDs About 4 weeks before that I had sent them well I sent the stuff to the HZA and they forwarded it a printout showing these LEDs were FREELY available in Germany from digikey pricy again stating that I don t understand why my shipment was held by them I was told on the phone they couldn t really make a decision based on the WS2812B datasheet I had sent them why not After a while I found out that the HZA had not sent them the actual hardware for close examination pigeonholing but they only got a very mediocre photograph WTF Yet another reason why the WS2812B LEDs on feeder tape P P assembly were mistaken to be a ready to go 5V LED strip end user product vs to be assembled parts The whole issue seems to be circling around some EU regulations dealing with end user products and CE markings RoHS conformity and so on and so forth Individual electronics parts seem to be exempt At least that is my understanding now It would be quite hilarious if individual LEDs ceramic capacitors resistors had to be marked with the CE symbol Tomorrow I ll try to get my stuff try not to smirk or start a fight This entry was posted in Electronics and tagged aliexpress CE China customs HZA import RoHS WS2812B Zoll Bookmark the permalink Status lamp on the loose Partial oven teardown Importing LEDs from China Battle with customs follow up 2 Responses to HZA Won the battle but not the war EllisGL says July 2 2015 at 23 52 Crap I order a reel too last week Hopefully I get mine Reply robert says July 3 2015 at 00 05 Good luck Reply Leave a Reply Cancel reply Your email address will not be published Required fields are marked Comment Notify me of followup comments via e mail Name Email Website Leave this field empty CAPTCHA Code Search for Recent Comments robert on YauDL Y et a nother u seless D ummy L oad Andrew Duckworth on YauDL Y et a nother u seless D ummy L oad robert on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Serhii on YOUYUE 858D hotair station BLDC Fan speed mod Archives Archives Select Month January 2016 1 December 2015 2 November 2015 3 October 2015 2 September 2015 10 July 2015 4 June 2015 5 May 2015 2 April 2015 5 March 2015 3 February 2015 2 January 2015 1 December 2014 2 November 2014 2 October 2014 3 September 2014 1 August 2014 2 July 2014 2 June 2014 2 May 2014 2 April 2014 4 March 2014 3 February 2014 2 January 2014 1 December 2013 3 November 2013 6 October 2013 3 August 2013 3 July 2013 2 June 2013 6 May 2013 6 February 2013 2 January 2013 5 December

    Original URL path: http://blog.spitzenpfeil.org/wordpress/2015/07/02/hza-won-the-battle-but-not-the-war/ (2016-02-10)
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