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AVR32UC3A0 RTC BUSY stuck at 1 and PM OSC32RDY stuck at 0 for some Silicon
I may have seen this quite a few years ago.   I had configured the RTC to use the internal RC oscillator as clocksource. The purpose of this was to get something I could use...
Thursday, 12 May 2016 - 06:31
Frequency meassurment - how to increase accuracy?
@Who-me: That qualifier is valid, and is why I have the interpolator circuit to give me 360ps step size: When the stochastic jitter of the edges is less than a half a step, then...
Wednesday, 23 October 2013 - 06:50
Frequency meassurment - how to increase accuracy?
@Who-me: Slightly hungrier, but sqrt(samples) better measurement performance. @blargg: Yes, cumulative time. It looks about right. The no-memory form of linear regression can be...
Tuesday, 22 October 2013 - 17:14
Frequency meassurment - how to increase accuracy?
Once OP has the timestamps working, it is time to think back to something learned in school: The 'best line fit', specifically the 'least squares first order regression'. If you...
Monday, 21 October 2013 - 22:19
disadvantages of 2.4 GHz wireless module on human body
This is what I use when I feel I need to figure out a safe distance from a transmitter: 50mW/cm^2, with my personal safety margin of 50, so 1mW/cm^2. The most microwave sensitive...
Tuesday, 4 June 2013 - 18:57
When to actually use assembler?
One answer to the 'when not to use C' question is in the start of the K&R book, where they define what C is, and is not. In particular, in C, you can not control...
Saturday, 11 May 2013 - 11:04
Controlling a 12v Led-Strip with PWM
top schematic, IRF540: Add something (~100R) in the gate to stop this becoming an RF transmitter during the turn-off. And 10k in the base will give you plenty base current, no...
Thursday, 27 December 2012 - 21:30
Atmel Studio 6.0.1996 available (Service Pack 2)
Not going too good here. I installed it over a previous working version 6, and it told me my jtagice-mkII would need to be upgraded from 7.17 to 7.1d. Fine, I let it do so. At the...
Tuesday, 20 November 2012 - 19:21
here's one you might like....reset on use of AtoD
You are not the first to run into this. 5 years ago I did this measurement for ATMega16:https://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=50727&...
Friday, 26 October 2012 - 11:18
Battery charger constant current stage issue
Two things: Your PFET is backwards, and your need 2 more resistors. So to understand what is happening, draw the body diode of the PFET onto the schematic: Inside the PFET there...
Saturday, 13 October 2012 - 13:17
How to size the correct capacitor for this...
The question was 'How do I size this thing'. You start out by guesstimating the inductance per length. I put 2 wires on my LCR meter, held them 3cm apart, and got 2.7uH/m. Second...
Wednesday, 10 October 2012 - 18:00
avr as RTC clocked from mains
I tested this a year or two ago. Greece is, afaik, on the mainland-europe grid, so this should apply to you: http://n1.taur.dk/powergr.png The plot length is just shy of a year,...
Monday, 8 October 2012 - 14:25

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