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Evaluating Elementary Functions in Assembly
Or an external chip.  A 2Mb serial EEprom can be had in a lil' 8-pin SOIC for a buck-fifty or so*.  You can do the calculations offline to load the EE with your lookup...
Monday, 13 January 2020 - 08:34
makeing a level shifter for i2c or forcing 5vttl.
obdevel wrote: Section 6.2 of the summary datasheet shows that the ATmega32u4 will run at 16MHz between 2.7 and 5.5V. You can power the whole thing from 3 or 3.3V, unless you have...
Monday, 13 January 2020 - 08:09
makeing a level shifter for i2c or forcing 5vttl.
The ATmega32u4 will run fine at 3.3V, and given a 3.3V Vcc on the connector, I doubt you'll need 5V on the I2C.  If you want to, put a voltmeter onto those i2c pins and see...
Monday, 13 January 2020 - 06:07
Label Duplicates in Assembly
clawson wrote: But that IS the way the Atmel assembler works. There is no linker. Everything is built in one pass of the assembler. Even if you split it all into separate .asm...
Monday, 13 January 2020 - 01:00
Why did my MOSFETS blow up?
I'm going to go with the 'fast overheating because they were only partially turned on' theory here.  Were those IRFs actually attached to anything heat-sink-shaped, or just...
Wednesday, 25 December 2019 - 21:07
Serial Downloading
I suppose it might be rude of me to point out that the original picture and the picture from the webpage awneil found just happen to be at almost exactly the same jaunty angle......
Wednesday, 18 December 2019 - 21:21
Arduino inline assembly
ka7ehk wrote: Consider what a jmp or rjmp might do.    I got burned very badly by that once when someone else decided to 'refactor' my assembler code into C.  He...
Monday, 16 December 2019 - 04:05
Avoiding the need to reinvent the wheel.......
Dunno if this covers it all (no RS-232, no fan speed control, &c) but for six bucks:   https://www.allelectronics.com/i...   Have fun!   S.
Tuesday, 3 December 2019 - 04:56
The "Complexity Trap"
I think the idea that really bugs me is that if I can control them from my smartphone, someone else can control them from theirs...   Oh yes, there's security of some sort or...
Friday, 22 November 2019 - 11:10
The "Complexity Trap"
clawson wrote: Kartman wrote:The smart lamps in my house generally get switched on/off at the light switch. The novelty wore off pretty quick. I haven't touched a light switch in...
Friday, 22 November 2019 - 09:33
mosfet gate ringing issue
Since you say it goes away when you unplug the motor, I'd join Kartman on this, because a motor is a giant inductor (considered a certain way).   You mentioned caps on one...
Thursday, 21 November 2019 - 13:43
Help with basic ATmega328p serial comms
andy.brown100@yahoo.com wrote: I have one final question, after the last character is outputted I place a space (ascii 32) but I would like a carriage return instead so I thought...
Monday, 4 November 2019 - 13:01

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