On a sunny day (Mon, 22 Oct 2007 07:16:18 -0700) it happened John Larkin wrote in :
Explosives?
push-push on/off switch
Oct 21, 2007
126 Replies
Probably more than half on.
Change the circuit into a phase-shift oscillator with a couple more RCs and release the switch when you are happy with the `brightness`.
Best regards, Spehro Pefhany
"it\'s the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
Not necessary. Just tap the switch a few times, and the gate voltage increasingly seesaws at each tap. In effect, it's already a phase-shift oscillator.
So it's a single-button controlled push-push switch and dimmer.
SPDT could be even neater.
John
Hold button down until gate and drain voltage at equal.
Release button.
Ignore cooking for the moment ;-)
How do you get out of this state?
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
America: Land of the Free, Because of the Brave
I just told you: tap the button a few times.
John
Nonsense, you're at equilibrium.
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
America: Land of the Free, Because of the Brave
Well, you're arguing with reality, and reality usually wins.
John
Any self-heating involved?
Best regards, Spehro Pefhany
"it\'s the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
I suspect either that or charge injection from the finger through the switch === reality ?:-)
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
America: Land of the Free, Because of the Brave
That question evaporates when one realizes that fun is the purpose of doing it in the first place. ;-)
Cheers! Rich
Well, yeah, but that's like a bonus, sort of fun squared! ;-)
Cheers! Rich
"Interesting"? ;-) Ever heard the old Chinese curse: "May you live in interesting times."? ;-)
Or at the other end of the spectrum, "Hey, make it a feature!"
Cheers! Rich
If people want to attack ideas instead of playing with them, that's their choice in life. But I'd advise those people from bidding against me for anything non-trivial.
And how do you know how I want my "stuff to be considered"?
John
HV cutout. What's it for?
I love those tiny schmitts. For oscillators, switching regulators, clock cleanup, debounce. Just don't try making a crystal oscillator from one.
John
Larkin
For Pete's sake, it's simple. Think about it.
John
Head West on I10?
If it works, then leakage is the reality of it. Real, but
unpredictable.
That'll work.. or East... just about the same distance ;-)
...Jim Thompson
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
America: Land of the Free, Because of the Brave
Just put 3 finger-size pads on a PCB with narrow spaces between them. Middle on goes through 100k or something to the gate. Top and bottom go to +V and GND. No switch or capacitor required.
Best regards, Spehro Pefhany
"it\'s the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
Ruffle your feathers a little and you assume a threatening stance
with that macho crap?
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