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Getting high AC Voltage, is it okay to power my oscilloscope?
If your location is powered off of two phases, check your neutral line - it might be disconnected.   See if anything run off the other phase is at very low voltage at the...
Thursday, 27 February 2020 - 13:06
The Art Of Electronics, 3rd ed; "The X-Chapters"
microcarl wrote: In inw of their new product videos, they said they were given first "Dibs", ahead of the general public.   Dunno about that - my copy (from Indiebound, link...
Sunday, 23 February 2020 - 16:25
Fast AC voltage fault detector
In this particular case, I think the OP was using LEDs as an example of an output.  They may indeed have something much faster to hook up in mind.  S.
Friday, 21 February 2020 - 19:05
Fast AC voltage fault detector
If you're only detecting peak voltages, you have a frequency problem.  Given an AC line frequency of 50Hz then the peaks will only come along every 20ms - much longer than...
Friday, 21 February 2020 - 12:04
Quadrature encoder is moved while power off
avrcandies wrote:Obviously more than one spin will be undetectable.   There are multi-turn absolute encoders out there.  They're expensive.  S.
Tuesday, 18 February 2020 - 18:11
Connecting some pins together (mega88)
PS - Yes, there are sometimes applications for self-destructing chips.  e.g. when your spy plane crash-lands at a Chinese airport.  Most of these applications involve...
Tuesday, 11 February 2020 - 01:41
Connecting some pins together (mega88)
A few more suggestions:   1) Most board houses charge by the square inch.  Even one-time setup charges are going away.  If the board really is that small, it'll be...
Tuesday, 11 February 2020 - 01:24
Recovering "External 16MHz"-fused mega2560
As an aside, I got burned by this once.  Apparently even Atmel (now Microchip) isn't consistent about the XTAL pins.   gchapman wrote:XTAL2 then XTAL1, if need be, per a...
Saturday, 8 February 2020 - 01:21
Connecting some pins together (mega88)
Should be okay as far as I can see, but as you understand this is not a recommended practice.  If you get your program wrong, you will blow your chip.  So don't do that...
Sunday, 2 February 2020 - 21:00
Ring Buffer vs Array Buffer
david.prentice wrote: The first singe-chip MicroControllers had UARTs.   Which meant you could discard the external memory bus.   My first-ever use of an AVR was a...
Saturday, 25 January 2020 - 10:11
Very tempting
The 'bundle' says it's a 4-channel, but it looks like they mux them into two ADCs.  's got four BNC probe connectors...    S.   Edited to add: And they admit...
Wednesday, 22 January 2020 - 00:33
Very tempting
jgmdesign wrote: Vendors get paid first.   Sometimes I wish my clients had your ethos.  S.
Wednesday, 22 January 2020 - 00:01