Post Created date
High Pass DSP?
Jim, Sorry for long delay. Hint I gave for multiple samples, and it works for bipolar data aquired unipolarly. It was was for 3phase voltage and power measurements, 25 years ago...
Monday, 8 July 2019 - 11:46
High Pass DSP?
In post #3 you are close. Use variance, sum of squares minus square of sums. That is a trick for RMS on the fly, without individual x-xbar, on ac coupled system. Subtracks dc...
Friday, 5 July 2019 - 10:44
Pulse count from engine pickup coil
A pickup coil sensor might be variable reluctance. The coil is biased with a magnet, the moving target is metal, the target changes magnetic flux to generate voltage. The voltage...
Saturday, 16 June 2018 - 22:42
ADC: Calculating RMS of a DC Biased signal.
There is a way to calculate RMS with offset, by subtracting the mean once. On the fly calculations involves sums and sums of squares. N cycle update involves subtraction, square...
Wednesday, 14 March 2018 - 00:40
Behold . . . new dip adapters are born...
For the AVR adapters, do you place bypass caps close under chip, and pads for crystal and load caps? Oops, I read mention of not. On some generic adapters, I have installed 0304...
Sunday, 25 February 2018 - 00:32
Atmega328 hang/freeze , very noise!
Ground planes that extend beyond circuit, and have sharp corners are good for radiation of signals. That is why route of grounds is good.
Sunday, 18 February 2018 - 14:46
Atmega328 hang/freeze , very noise!
The typical ignition IGBT has integrated protections, and clamp. Been using them for years without issues. Trying to use diode will likely suppress ignition energy to plug.
Saturday, 17 February 2018 - 18:30
Atmega328 hang/freeze , very noise!
Have you studied data sheets on ignition IGBT parts, and related application notes?
Saturday, 17 February 2018 - 17:47
Atmega328 hang/freeze , very noise!
I hope you wear safety glasses. The 1N914 might explode. If you understand what you are doing, the diode is a disadvantage. I am not good help on your layout. For what you are...
Saturday, 17 February 2018 - 17:28
Atmega328 hang/freeze , very noise!
The same plane for the ground could be a problem. Route of grounds, gives flexibility for control of curent paths.
Saturday, 17 February 2018 - 12:58
Atmega328 hang/freeze , very noise!
Both Kartman and Brian are on target. Fairchild Semi makes logic level IGBT coil drivers. I have used those with success. I also use 1k chip inductor to feed gate, but no snubber...
Saturday, 17 February 2018 - 12:52
Learning more useful knowledge about electronics
The way I learned more tha 5 decades ago was reading catalogs, data sheets, applications notes, and building projects. After all that, earned a bsee degree. Varied work...
Tuesday, 13 February 2018 - 09:30

Pages