With all the talk about a delay circuit, here is what I have. I didn't have time during the week to take pictures and post until tonight. I got this module from a vendor over 30 years ago. He was trying to have us put it into our trucks as a standard or option ( I used to work Peterbilt Motors). He gave us samples and I still have one. It's a "plug and play". I have never seen another one this small. It's about 2 1/8" long and a little less than 3/8" in diameter. If someone wants to duplicate it, all I ask is that you give me a couple in return as payment. Here is the link to a video and pictures. The delay is about 10 seconds and this is powering the three interior (LED) lights of my tin top. https://tinyurl.com/y9ejfkvj Unfortunately, after messing with it and taking pictures, it doesn't seem to work anymore. Lights will not go off, it just stays on. I am bummed now. -Dick- -----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Alistair Bell Sent: Wednesday, August 2, 2017 5:40 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: Time Delay LED Lighting Circuit Neil, Where is my brain? I just remembered I bought a delay timer really unit from banggood. It's this one Geekcreit® DC 12V LED Display Digital Delay Timer Control Switch Module PLC https://banggood.app.link/YobsCIrqiF I haven't tried it, and I forget why I bought it :-) But i think it might be a solution for you. It's not very big. Up to 999 second delay via a relay. Maybe I'll set it up on the breadboard to give you an idea of how it works. And give me an idea of how it works. Alistair
> On Aug 2, 2017, at 1:09 PM, Neil N <musomuso@gmail.com> wrote: > > Thanks for that David. I've been so involved in other wiring projects, > haven't read this thread yet. > > Thats a sizeable cap! Image showing measurements: > > http://tinyurl.com/ybxpvnx5 > > I did see your comment on semiconductors being used for this type of circuit. > >> On 8/2/17, David Beierl <dbeierl@attglobal.net> wrote: >> >> Osram DE3423 LED festoon lamp is one watt. If you want ten seconds >> of fading light at average half brightness that would require >> something like five watt seconds of storage in your capacitor. Say >> six or seven because of the threshold voltage of the LED. WS = C x >> V^2 / 2, so C = WS / (V^2 / 2). So C = 7 ws / (12V^2 / 2) = 7 / 72 = ~0.1 farad or 100,000 uF. >> >> Here's one that would serve. It's nominal 40 mm diameter and 80 mm >> length, and it costs ten bucks US in onesies. >> https://www.digikey.com/product-detail/en/united-chemi-con/ESMH160VSN >> 104MA80T/565-2624-ND/757837 >> >> Yrs, >> d >> >> >> >>> On Wed, Aug 2, 2017 at 1:32 PM, Neil N <musomuso@gmail.com> wrote: >>> >>> Thats great! So about 5 seconds eh? I'd think that for a festoon the >>> cap(s) would have to be much bigger. But maybe 3 of those small >>> LED's would be plenty? >>> >> > > > -- > Neil n > > Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca> > > 1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy> > > 1981 Westfalia "Jaco" Images, technical > <http://tubaneil.googlepages.com/> > > Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay> |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.