Re: push-push on/off switch
- From: Jim Thompson <To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx>
- Date: Mon, 22 Oct 2007 09:45:45 -0700
On Mon, 22 Oct 2007 12:28:11 -0400, Spehro Pefhany
<speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 09:13:52 -0700, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 09:08:59 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 08:58:37 -0700, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 08:47:23 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@xxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 08:41:49 -0700, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 11:04:11 -0400, Spehro Pefhany
<speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 07:16:18 -0700, John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Mon, 22 Oct 2007 10:14:16 GMT, Jan Panteltje
<pNaonStpealmtje@xxxxxxxxx> wrote:
On a sunny day (Sun, 21 Oct 2007 14:52:26 -0700) it happened John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
<ifinh3tb6joqflk8pu98hsjnoahp0f1l8a@xxxxxxx>:
http://img20.imageshack.us/my.php?image=pushpushxo0.jpg
John
Clever :-)
Keep button pressed for half on?
Probably more than half on.
Yup. Now, how does one get back to full on/off?
John
Change the circuit into a phase-shift oscillator with a couple more
RCs and release the switch when you are happy with the `brightness`.
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
I just told you: tap the button a few times.
John
Nonsense, you're at equilibrium.
...Jim Thompson
Well, you're arguing with reality, and reality usually wins.
John
Any self-heating involved?
Best regards,
Spehro Pefhany
I suspect either that or charge injection from the finger through the
switch === reality ?:-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
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