PCPaul
Guest
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 Posted: Thu May 29, 2008 3:54 am Post subject: Mains powered outdoor delay switch |
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Since pneumatic or mechanical delay switches with outdoor fitting kits
are extortionately expensive, I was wondering if anyone had a good
circuit for making my own...
Ideally a single button press would start a delay timer that activates a
light for a few minutes (to light the way from the garage to the house).
I>m happy enough with digital electronics but my analogue is weak.. it
seems like there should be a way to use mains only for this, with a triac
or SCR to switch the load (<1000W) and some sort of rectified feed to a
CR circuit to do the timing. I>m sure there must be a better way...
The issue of it being outdoors (basically replacing a dead pneumatic
weatherproof switch) is also a problem, but making a sealed rainproof box
with a suitably rated momentary switch shouldn>t be too difficult.
Any ideas?
(I>ve seen the motorised timers in an earlier thread but they were 110V
and in the US - I>m in the UK on 240V 50Hz). |
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