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How to use a watchdog in a multi-interrupt setting
I want to make my software safer by using a watchdog (a short interruption for restart is no problem). In total it is a sort of digital software receiver running functions in real...
Monday, 3 March 2014 - 15:50
See my RFID Webinar
I did a webinar about RFIDs. You can watch me live in action here: http://www.youtube.com/watch?v=n... Many of the circuits shown are based on AVRs. Enjoy and forgive me for the...
Thursday, 6 June 2013 - 19:38
Xmega128A1 PLL range (solved)
In one of the datasheets its said that the PLL can generate up to 128MHz to supply hi resolution functions. If I lock the PLL to an external clock, I can pull it to 128MHZ it...
Sunday, 7 April 2013 - 08:55
Perfectly coupled inductors in (LT-)spice
I want to simulate a transformer using coupled inducors in Spice (LTspice). I found some unexpected behaviour at very high frequencies. My observation can be boild down to the...
Monday, 3 September 2012 - 08:03
Webinar AVR/SDR see and hear me
For those interested in Software Defined Radio (SDR) using AVR processors have a look into my first ever webinar (That was an experience....). I give an overview over a six part...
Wednesday, 18 April 2012 - 18:54
AY 3 3550 datasheet
I am repairing an instrument that uses an AY 3 3550 as converter/display controller. I could not find a datasheet in the net. Perhaps someone of you has can make a scan from a...
Thursday, 1 December 2011 - 16:35
avionics instrument, motor
I have the instrument shown in the photo and I want to play with it. There are resolvers in it. They are not the problem. But there are motors inside of a type I dont know. The...
Thursday, 18 August 2011 - 13:57
I killed my STK600
I supplied my STK with an ext. Voltage via Vtarget while the STK was off. (Ok, the manual says you should'nt do, but I read it afterwards.) Any ideas for repair ?
Tuesday, 19 July 2011 - 09:37
TL494 halfbridge with MOSFETs
I have a NSP-3630 power supply that has let out it's magic smoke. http://www.manson.com.hk/file/pr... The mains-fuse was blown, it smelled a little strange (probably due to some...
Monday, 4 April 2011 - 08:49
GPIO pin puzzle
Often in microcontroller-Systems jumpers are used to select options. Now assume the following setup: You can use two GPIO pins of an AVR. These pins have no additional...
Tuesday, 8 February 2011 - 18:53
PC power soft turnon
If some of the computers in my home are switched on with the power-switch sometimes the fuse (10A,230V) trips, probably due to inrush current. I plan to built a soft turnon switch...
Monday, 3 January 2011 - 16:27
Who has DESfire RFID experience
I am building an RFID reader using the PN512 from NXP. I can successfully read from Mifare cards. I can read some data also from DESfire cards, but have problems with some...
Sunday, 26 December 2010 - 13:01