Date:         Mon, 31 Jul 2017 12:08:13 -0700
Reply-To:     Neil N <musomuso@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Neil N <musomuso@GMAIL.COM>
Subject:      Re: Time Delay LED Lighting Circuit
Comments: To: Alistair Bell <albell@shaw.ca>
In-Reply-To:  <4E5DDDBF-CED7-47B7-92E1-2C8ED5C2E351@shaw.ca>
Content-Type: text/plain; charset="UTF-8"

Thanks Alistair. My typical MO is "I know enough to get in trouble",
so have a small understanding of this circuit thus hadn't thought of
deploying a gradual dimming feature. Might be nice to have.
Hmmmmm..... that would be determined by type of electrolytic cap? But
I see your point: an incandescent bulb might make more sense here.
Instead of dimming, maybe wire it up so it honks my horn when light
goes out? LOL. (I always "enjoy" hearing that when people lock their
cars in campgrounds)



On 7/31/17, Alistair Bell <albell@shaw.ca> wrote:
> Yea Neil I've put a golf/Jetta league 80s early 90s dome light in. Same look
> as the vanagon lamp but with the delay circuit.
>
> I haven't bothered to look at the circuitry. But the delay off feature
> happens after 6 - 7 seconds, that's light on then off . No dimming as it
> goes off as you find it other cars ( ie BMW).
>
> What do you think the voltage drop profile will look like in your circuit?
> Maybe a bit of a dimming then off? Leds don't dim that well with decreasing
> voltage, there is a minimum voltage to make it light up.
>
> Alistair
>
>
>> On Jul 31, 2017, at 11:54 AM, Neil N <musomuso@GMAIL.COM> wrote:

>> Save for the voltage supply amount, resistor (not needed with
>> automotive application 12 volt LED?), capacitor voltage rating, switch
>> arrangement, is that VW time delay light basically designed like this?
>>
>> Link to image of schematic for a time delay light:
>


--
Neil n

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