Date: Mon, 25 Nov 2013 11:14:14 -0800
Reply-To: Al Knoll <anasasi@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Al Knoll <anasasi@GMAIL.COM>
Subject: Re: 12v programmable timer
In-Reply-To: <CABx3TkWwGgr9+vMT9g5gqavVHG6k6T=5gmT5kdLsM72ppLZ+xg@mail.gmail.com>
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Collaboration is so kewl. Troll and ye shall find. Sounds to me like
a metallic contact aka relay system in the box. Quite suitable as a
driver for a high current buffer relay like the 40A ones. Thanks for
the clarification. Now to disembowel the first one and see whats in
there.
However for most DC applications, my vanagon is mostly DC, one of
these could be pretty kewl. To turn off The Greatful Dead music after
retiring or turn on Jimi and The National Anthem in the morning.
Applications abound.
Pensionerd.
On Mon, Nov 25, 2013 at 10:32 AM, Ryan Press <ryan@presslab.us> wrote:
> It probably has a TRIAC in it, and not an SCR. The SCR would only
> work on half of the AC cycle, so there would need to be two devices.
>
> With a TRIAC it will only work with an AC load. So if indeed this
> device uses a TRIAC and does not use a mechanical relay, it's
> unsuitable for a DC load. Once the DC load turns on, it would never
> turn off unless the load was otherwise disconnected.
>
>
> Ryan
>
> On Sun, Nov 24, 2013 at 3:38 PM, Al Knoll <anasasi@gmail.com> wrote:
>> The amperage (current) spec is likely independent of the voltage. It
>> generally has to do with the current carrying capacity of the SCR or
>> contacts that pass the current to the load. I suspect a working limit
>> would be 150W.
>>
>> Looking up the current specifications knowledge database is left for
>> an interesting segue from the usual path.
>>
>> Pensionerd.
>>
>> On Sun, Nov 24, 2013 at 1:54 PM, Edward Maglott <emaglott3@gmail.com> wrote:
>>> Yes, that's what it says. Now I notice it has no rating for DC:
>>>
>>> Contact Capacity: 16A(8)A,250V AC
>>> Resistance load: 16A
>>> Inductive load: 8A
>>>
>>> I wonder what it can handle in the 12vDC vanagon world? It's
>>> probably some kind of solid state switch I imagine, maybe it has a DC
>>> rating if you opened up the thing and looked around.
>>>
>>> Edward
>>>
>>>
>>>
>>> At 03:50 PM 11/24/2013, Alistair Bell wrote:
>>>>
>>>> Edward,
>>>>
>>>> looks pretty neat, and it does switch up to 250V AC?
>>>>
>>>> alistair
>>>>
>>>>
>>>> On Nov 24, 2013, at 10:27 AM, Edward Maglott <emaglott3@GMAIL.COM> wrote:
>>>>
>>>> > Here's something I've been waiting to find for cheap for a long
>>>> > time. Could be used in the van for what??? Use your
>>>> > imagination. Maybe lights or fans that only need to come on
>>>> > automatically at certain times of day? Also thinking this could be
>>>> > great for use in solar applications on and off the van. It could
>>>> > disconnect a small inverter (mind the capacity of the contacts in
>>>> > this timer) from the batteries except when needed to avoid that idle
>>>> > drain.
>>>> >
>>>> >
>>>>
>>>> http://www.banggood.com/DC-12V-Mini-LCD-Digital-Microcomputer-Control-Power-Timer-Switch-p-909362.html
>>>> >
>>>> > Edward
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