Post Created date
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...
Sat. Jun 16, 2018 - 10:42 PM
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...
Wed. Mar 14, 2018 - 12:40 AM
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...
Sun. Feb 25, 2018 - 12:32 AM
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.
Sun. Feb 18, 2018 - 02:46 PM
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.
Sat. Feb 17, 2018 - 06:30 PM
Atmega328 hang/freeze , very noise!
Have you studied data sheets on ignition IGBT parts, and related application notes?
Sat. Feb 17, 2018 - 05:47 PM
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...
Sat. Feb 17, 2018 - 05:28 PM
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.
Sat. Feb 17, 2018 - 12:58 PM
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...
Sat. Feb 17, 2018 - 12:52 PM
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...
Tue. Feb 13, 2018 - 09:30 AM
Bad 328P?
There are simple things to check: target voltage, integrity of programming connections including ground, oscillator, cap on reset value, bypass caps on vcc....Also Investigate...
Sun. Feb 11, 2018 - 02:52 PM
AVR/Arduino Hardware Debugger on the Cheap
Nice project! You also have great technical documentation skills. Using debug wire is on my bucket list, I hope to follow your project.
Tue. Feb 6, 2018 - 01:43 AM