"John Fields" wrote in message news
On Thu, 5 Sep 2013 12:24:41 -0700, "Guv Bob"
wrote:

"John Fields" wrote in message ...
On Wed, 4 Sep 2013 11:21:01 -0700, "Guv Bob"
wrote:

"dave" wrote in message m...
On 09/04/2013 01:17 AM, Jan Panteltje wrote:
On a sunny day (Tue, 3 Sep 2013 16:01:31 -0700) it happened "Guv Bob"
wrote in
:

Will this work?

Size R & C so that when switch closes, relay energizes after 5 =
seconds, and remains energized until switch is opened.

http://img839.imageshack.us/img839/4650/uh3.gif

Yes, but 5 seconds needs a big C.


http://www.ebay.com/sch/i.html?_odkw...=0&_fr om=R40

Thanks Dave. That's exactly what I have been looking for. Problem is I can only find these or similar units in the $5-20 range from China (2-3 weeks). Omron and others available in US are $70+

---
Why can't you use Jasen Betts' circuit?

--
JF

What circuit is that? I don't see it.

in------+-------------+ | |
| . . . .|. . . . | . VCC(8) .
| . . +-----+-------RES(4) OUT(3)------
out _|_ | . 555 . D1 A [R1]
+---TH(6) DIS(7)-- 'T` | | . .
+-----+---+---TR(2) CV(5)-- | . .
C1 ===== . GND(1) . | . . . ..|. . . .
| | ----+-------------+---
ground
U1 LMC555 / 7555
D1 1N914
C1 10uF
R1 470K

--
JF

Thanks, fellows. Sorry for my ignorance -- I tried viewing this in fixed pitch and still can't make out the connections. Any way to sketch it out and upload it somewhere or post it at one of the binary groups? These are active...
alt.binaries.schematics.electronics,alt.binaries.s chematics.electronic
Bob