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Maximum current ratings for device ...and pin groups? What am I missing?
That chip will get HOT so also make sure to keep it inside spec. for temperature ;)
Saturday, 18 July 2020 - 23:09
floating point math vs. integer math
So for the negatives I have to flip and add one, apply "my" math, and then add the right sign.   Isn't it?   That depends of how the chip do it! If 2's complement yes...
Friday, 17 July 2020 - 10:48
floating point math vs. integer math
It would have been nice if C had the */ operator forth use ;)    (the * hold double precision)
Friday, 17 July 2020 - 10:39
Help me choose a microcontroller
Google it, and read the datasheet, in general the old AVR's like a mega328 had a real crystal osc. that can use a cheap crystal, many of the new don't, (but some a 32KHz osc...
Thursday, 16 July 2020 - 12:42
Help me choose a microcontroller
If you need to make many of these here is all you really need :   2 leds, a relay, 5 buttons, two microswitches, a buzzer and a display(4 x 7segment leds)...
Thursday, 16 July 2020 - 11:01
Intergral Windup method in PID control
Your Y scale and "b is in celsius" and setpoint is 85C need to be in same scale.   
Wednesday, 15 July 2020 - 17:42
Any rules of thumb for predicting/affecting optimiser behaviour ?
Your point is good but. I will just correct : The RCALL variant can only be used if the function lies within ±4kB of the instruction is ±2K instructions (or ± 4KB)
Monday, 13 July 2020 - 22:59
Letting a uint8_t overflow to track an 8-bit timer?
Good we have social health care, so we don't need to know about that kind of prices, we get fixed when needed, and I guess that also a reason we can keep covid 19 down, (10000+...
Sunday, 12 July 2020 - 22:59
What is the association of the three registers DIR DIRSET DIRCLR
Note: Have in mind that when you go into very fast IO's (in the past FPGA's and DSP's but now micros also are getting there), you often have to slow down the IO's so the ...
Sunday, 12 July 2020 - 11:37
ATTINY85, trying to set up a USI/SPI daisychain
Why on earth should an extra nop do anything !!! there are something more under the hood.
Saturday, 11 July 2020 - 15:45
Maximum current ratings for device ...and pin groups? What am I missing?
Do we know which 4809 OP use ? The 40 pin version is a DIP40
Friday, 10 July 2020 - 14:17
Fast interrupt, with constant code size cases
First the clean way to do this is to have a function pointer that gets updated at the end of the ISR, so next ISR will call the correct function for the next state. The problem is...
Friday, 10 July 2020 - 09:56