On Sat, 14 Nov 2009 15:20:50 -0700, Jim Thompson wrote: >On Sat, 14 Nov 2009 10:08:21 -0800, >"JosephKK" wrote: > >>On Tue, 10 Nov 2009 18:12:06 -0700, Jim Thompson >> wrote: >> >>>On Tue, 10 Nov 2009 19:26:15 -0500, "Dave M" >>>wrote: >>> >>>>Jim Thompson wrote: >>>>> On Tue, 10 Nov 2009 18:20:25 -0500, "Dave M" >>>>> wrote: >>>>> >>>>>> Jim Thompson wrote: >>>>>>> See attachment... >>>>>>> >>>>>>> Combination rotisserie motor and light for the BBQ. >>>>>>> >>>>>>> Of course, when you close the BBQ lid you block the light :-( >>>>>>> >>>>>>> Any cute ideas to automate lid closure == light off? >>>>>>> >>>>>>> Problems: >>>>>>> >>>>>>> Stainless Steel >>>>>>> VERY Hot >>>>>>> >>>>>> >>>>>> >>>>>> Mercury switch from old HVAC thermostat? >>>>> >>>>> Not bad! Where could you buy such a thing? >>>>> >>>>> ...Jim Thompson >>>>>> James E.Thompson, CTO | mens | >>>>>> Analog Innovations, Inc. | et | >>>>>> Analog/Mixed-Signal ASIC's and Discrete Systems | manus | >>>>>> Phoenix, Arizona 85048 Skype: Contacts Only | | >>>>>> Voice:(480)460-2350 Fax: Available upon request | Brass Rat | >>>>>> E-mail Icon at http://www.analog-innovations.com | 1962 | >>>>> >>>>> Obama wee-wee'd on himself, that's no problem, >>>>> But you should be worried that he poo-poo'd on your Constitution. >>>> >>>>Given that mercury is such a no-no in consumer products, your best bet would >>>>be to find a friend in the HVAC business and try to finagle one out of an >>>>old unit that's headed to the recycle bin. >>>>Another suggestion would be to get a SPDT microswitch with a lever or roller >>>>actuator. Mount it so that the switch actuates when the lid is closed, >>>>opening the contacts. Similar to the one at >>>>http://www.mpja.com/prodinfo.asp?number=18085+SW >>>>A magnetically operated alarm switch might work even better: >>>>http://www.allelectronics.com/make-a-store/item/MS-7/SPDT-N.O./N.C.-MAGNET-SWITCH/-/1.html >>> >>>Magnetic won't work, it's all (nicely) stainless. >>> >>>Can't someone come up with some exotic _electronic_ way to do it ?:-) >>> >>> ...Jim Thompson >> >>Alarm type contacts have their adjacently mounted activating magnet. >>Wood doors are far more non-magnetic. > >You forgot the heat issue. > > ...Jim Thompson The solution to that is a combination of placement and materials selection. It would not that hard to stay within the curie temperature of the magnetics when well placed. Of course care in selecting the magnetics is also required to have maximum working temperature. --