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Driving a single coil relay with higher voltage than the coil is rated for?
I may be unclear on how a capacitor in series can be grounded, but I've used tricks like that to throw relays.    The holding current is much less than the throw current...
Sunday, 12 September 2021 - 03:21
Need magnification lens for soldering like this one.
I've had some success with gizmos like this:   https://www.allelectronics.com/i... https://www.allelectronics.com/i...   They are very much cheap'n'cheerful. ...
Sunday, 5 September 2021 - 22:31
how to get speed limit from latitude and longitude using microcontroller
It is not impossible to use a camera to recognize speed limit signs, and once that can be reliably done, driving around a lot, but as has been pointed out before, this is a job...
Monday, 30 August 2021 - 23:58
how to get speed limit from latitude and longitude using microcontroller
ka7ehk wrote: I have seen highways with "High Occupancy Vehicle" or "Commuter" LANES within the highway that have different speed limits. So, you can have different limits in just...
Monday, 30 August 2021 - 22:40
common programing mistakes
avrcandies wrote: Almost like changing your first 3 moves in a chess game.   Ahh, but the beauty of doing so in board layout means you get a do-over.  In chess,...
Friday, 27 August 2021 - 06:26
KEYPAD 4X4 WHITOUT LIBRARY AND ATMEGA32
Seconded.  Turn off the JTAG fuse.   Or use an analog input pin and my 4x4x1 keypad project...     S.   https://community.atmel.com/proj...
Friday, 27 August 2021 - 05:15
common programing mistakes
@ avrcandies : I try to get most of that out of the way early on.  I think one of the worst bad habits of PCB layout is being NOT willing to rip up a partially done board...
Friday, 27 August 2021 - 04:25
common programing mistakes
balisong42 wrote: One I'm guilty of is excessive/pointless optimization.   I do that to circuit board layouts.  I like to just leave them up on the screen(s) for a few...
Friday, 27 August 2021 - 03:48
favorite variable and function names that you use in most programs.
In assembler (not C) I like to prefix various subroutine labels with their category.  For example, serial port routines will be called things like "SER_CHAR_PUT", "...
Sunday, 22 August 2021 - 06:17
When a button is pressed, how long is it typically held down? (debouncing question)
*sniff*  No love for my antiquated 4x4x1 project?  *sigh*   https://community.atmel.com/proj...   S.
Wednesday, 18 August 2021 - 01:05
common programing mistakes
MattRW wrote: Simonetta wrote: The biggest common mistake in programming isn't with the programmers, it's with the C compiler writers.  They, all, to a man, absolutely refuse...
Monday, 16 August 2021 - 12:42
common programing mistakes
grohote wrote: Scroungre wrote: Or perhaps the classic programming error is surely to write C for a microcontroller...  Stick to assembler.  S.   I admire often...
Monday, 16 August 2021 - 12:35

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