M
miso
Guest
Depends. If a uP adds protections that an analog chip doesn't, then
it's safer.
Clearly you don't understand how watchdogs work.
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Depends. If a uP adds protections that an analog chip doesn't, then
it's safer.
Clearly you don't understand how watchdogs work.
Unless the company making the chip can't deliver quantities in time.
Then the firmware solution, the discrete solution, or pretty much any
other solution is a better solution. Because it avoids the single-source
problem.
Maybe the fools just understand what they need and how a light bulb mightPhil Allison schrieb:
** Why do so many fools suggest bulbs in place of resistors ??
Incandescent bulbs use tungsten wire that has a strong positive tempco
- so much so that the effective resistance value changes over a ratio
of about 12 times from room temp to full brightness.
Hello,
the fools are not aware of the dramatic change of resistance between a
cold and hot bulb...
Bye
I used a capacitor to slow down one of the paths returning from one nor gate to the input on the other.
On 8/15/2013 7:18 AM, Uwe Hercksen wrote:
Phil Allison schrieb:
** Why do so many fools suggest bulbs in place of resistors ??
Incandescent bulbs use tungsten wire that has a strong positive tempco
- so much so that the effective resistance value changes over a ratio
of about 12 times from room temp to full brightness.
Hello,
the fools are not aware of the dramatic change of resistance between a
cold and hot bulb...
Bye
Maybe the fools just understand what they need and how a light bulb might
be useful in that application.
Sometimes, easy and good enough is just good enough. And the fools
understand that.
On Thursday, August 15, 2013 11:23:38 AM UTC-7, bloggs.fred...@gmail.com wrote:
On Thursday, August 15, 2013 12:46:27 PM UTC-4, er...@bauld.com wrote:
http://img33.imageshack.us/img33/8556/jxky.png
That's ridiculous. The gates don't come close to satisfying:
"Intention is that:
1) On power up neither relay is on
2) On momentary reset relay /w green is activated
3) If at any time trip is closed, green side is off, red is on
4) If reset is hit while trip is still open, nothing happens
5) if trip is open then reset will function and be able to trigger green led
6) At no time will both red and green be active
7) On init neither LED circuit is on "
The most basic logic is wrong. Maybe think about a less challenging project.
Perhaps something is lost in translation. As I have it placed out on a bread board and it is functioning as required. The only change I had to make was the capacitor which as far as I could tell set the initial state of the SR Latch to avoid the race condition.
On Thu, 15 Aug 2013 12:56:43 -0700 (PDT), eric@bauld.com wrote:
"Intention is that:
1) On power up neither relay is on
2) On momentary reset relay /w green is activated
3) If at any time trip is closed, green side is off, red is on
4) If reset is hit while trip is still open, nothing happens
5) if trip is open then reset will function and be able to trigger green led
6) At no time will both red and green be active
7) On init neither LED circuit is on "
1. There's a conflict between "3" and "4". Shouldn't "4" read:
"If reset is hit while trip is closed, nothing happens."?
** Why do so many fools suggest bulbs in place of resistors ??
Incandescent bulbs use tungsten wire that has a strong positive tempco
- so much so that the effective resistance value changes over a ratio
of about 12 times from room temp to full brightness.
Maybe the fools just understand what they need and how a light bulb might
be useful in that application.
Sometimes, easy and good enough is just good enough. And the fools
understand that.
Depends. If a uP adds protections that an analog chip doesn't, then
it's safer.
Clearly you don't understand how watchdogs work.
Unless the company making the chip can't deliver quantities in time.
Then the firmware solution, the discrete solution, or pretty much any
other solution is a better solution. Because it avoids the single-source
problem.
You remind me of some old lady that got cheated by some name your ethnic
minority and thus has concluded for the rest of eternity that said
ethnic minority is a bunch of crooks. [Those damn Martians screwed me. I
will never buy from extra-terrestrials again!]
OK, Maxim dissed your dinky company. Get over it. Years ago they screwed
lots of people, but the people responsible for such nonsense are gone.
[Still plenty more people need to be shown the door, but plenty of
wankers retired.] Buy from LTC, TI, whatever.
"Klaus Kragelund"
Phil Allison schrieb:
** Why do so many fools suggest bulbs in place of resistors ??
Incandescent bulbs use tungsten wire that has a strong positive tempco
- so much so that the effective resistance value changes over a ratio
of about 12 times from room temp to full brightness.
When I was I kid, my dad go me introduced (indoctrinated) into electronics.
He gave me some switches and 12V bulbs to play with. He then added a large
12V bulb in series with the battery, so a short in the succeeding circuit
would be quite indicative. Bulbs can sometimes be put to good use
** 12V auto bulbs are often found in model train speed controllers as
current limiters and overload indicators.
Another use is with tweeters in high power speakers - one or two 12V bulbs
in series protects them from being over powered and damaged.
miso wrote:
Unless the company making the chip can't deliver quantities in time.
Then the firmware solution, the discrete solution, or pretty much any
other solution is a better solution. Because it avoids the single-source
problem.
You remind me of some old lady that got cheated by some name your ethnic
minority and thus has concluded for the rest of eternity that said
ethnic minority is a bunch of crooks. [Those damn Martians screwed me. I
will never buy from extra-terrestrials again!]
You need to get out more, talk to engineers in companies. Or go on
Digikey, key in "DC DC Switching Regulators".
Maxim total: 1221
Maxim in stock: 356
TI total: 7291
TI in stock: 3459
OK, Maxim dissed your dinky company. Get over it. Years ago they screwed
lots of people, but the people responsible for such nonsense are gone.
That's what some folks promised over and over again. Just promises. The
example above is from right now, today.
[Still plenty more people need to be shown the door, but plenty of
wankers retired.] Buy from LTC, TI, whatever.
Oh, I do buy from those. What I buy personally is of no consequence to
them or Maxim. The design decisions I make are.
In article <b77cc5For2cU1@mid.individual.net>, Joerg
invalid@invalid.invalid> wrote:
miso wrote:
Unless the company making the chip can't deliver quantities in time.
Then the firmware solution, the discrete solution, or pretty much any
other solution is a better solution. Because it avoids the single-source
problem.
You remind me of some old lady that got cheated by some name your ethnic
minority and thus has concluded for the rest of eternity that said
ethnic minority is a bunch of crooks. [Those damn Martians screwed me. I
will never buy from extra-terrestrials again!]
You need to get out more, talk to engineers in companies. Or go on
Digikey, key in "DC DC Switching Regulators".
Maxim total: 1221
Maxim in stock: 356
TI total: 7291
TI in stock: 3459
OK, Maxim dissed your dinky company. Get over it. Years ago they screwed
lots of people, but the people responsible for such nonsense are gone.
That's what some folks promised over and over again. Just promises. The
example above is from right now, today.
[Still plenty more people need to be shown the door, but plenty of
wankers retired.] Buy from LTC, TI, whatever.
Oh, I do buy from those. What I buy personally is of no consequence to
them or Maxim. The design decisions I make are.
Back in the day, I worked in a two-man company, and my rule was to
triple-source everything I could, and lifecycle stock everything I
couldn't. Because those companies don't care if a 2-man outfit lives
or dies.
Phil Allison <phil_a@tpg.com.au> wrote:
"Klaus Kragelund"
Phil Allison schrieb:
** Why do so many fools suggest bulbs in place of resistors ??
Incandescent bulbs use tungsten wire that has a strong positive tempco
- so much so that the effective resistance value changes over a ratio
of about 12 times from room temp to full brightness.
When I was I kid, my dad go me introduced (indoctrinated) into electronics.
He gave me some switches and 12V bulbs to play with. He then added a large
12V bulb in series with the battery, so a short in the succeeding circuit
would be quite indicative. Bulbs can sometimes be put to good use
** 12V auto bulbs are often found in model train speed controllers as
current limiters and overload indicators.
Another use is with tweeters in high power speakers - one or two 12V bulbs
in series protects them from being over powered and damaged.
I only used gold plated, cryo treated OFHC copper filaments in my tweeter
protecting lamps.
mike schrieb:
Maybe the fools just understand what they need and how a light bulb might
be useful in that application.
Sometimes, easy and good enough is just good enough. And the fools
understand that.
Hello,
but do the fools know if the source used is compatible to the high current
flowing through a cold bulb?
Bye
On Thu, 15 Aug 2013 12:56:43 -0700 (PDT), eric@bauld.com wrote:
On Thursday, August 15, 2013 11:23:38 AM UTC-7, bloggs.fred...@gmail.com wrote:
On Thursday, August 15, 2013 12:46:27 PM UTC-4, er...@bauld.com wrote:
http://img33.imageshack.us/img33/8556/jxky.png
That's ridiculous. The gates don't come close to satisfying:
"Intention is that:
1) On power up neither relay is on
2) On momentary reset relay /w green is activated
3) If at any time trip is closed, green side is off, red is on
4) If reset is hit while trip is still open, nothing happens
5) if trip is open then reset will function and be able to trigger green led
6) At no time will both red and green be active
7) On init neither LED circuit is on "
The most basic logic is wrong. Maybe think about a less challenging project.
Perhaps something is lost in translation. As I have it placed out on a bread board and it is functioning as required. The only change I had to make was the capacitor which as far as I could tell set the initial state of the SR Latch to avoid the race condition.
---
1. There's a conflict between "3" and "4". Shouldn't "4" read:
"If reset is hit while trip is closed, nothing happens."?
2. The capacitor delay implemented like that isn't a good idea.
3. You don't need extra transistors to drive the LEDs.
4. You don't need the pullups and pulldowns on the logic outputs.
5. This'll get you what you want: