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Author Topic: Bathroom heater timer  (Read 1205 times)
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kalpakchiev
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« on: April 14, 2010, 11:30:06 11:30 »

While heater is OFF: a short press turns it ON for about 30min. and a long press turns it ON for about 60 min

While heater is ON: a short press turns it OFF

Tested during last 5 years. Cool

Note: all the electronics are OUTSIDE of the bathroom
« Last Edit: April 14, 2010, 11:38:32 11:38 by kalpakchiev » Logged

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oldvan
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« Reply #1 on: April 14, 2010, 02:45:01 14:45 »

This could be a good place to apply Microchip's Capacitive Touch technology;
Circuitry can be entirely isolated behind 1/8" thick acrylic sheet and "buttons"
still detect finger presence to activate.

Details are here:  http://ww1.microchip.com/downloads/en/AppNotes/01250a.pdf
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kalpakchiev
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« Reply #2 on: April 14, 2010, 06:30:27 18:30 »

With more complicated device it will be cool, but in my case it is just one button which also accommodates piezo buzzer and a bi-color led.
« Last Edit: April 14, 2010, 06:40:47 18:40 by kalpakchiev » Logged

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« Reply #3 on: April 14, 2010, 06:39:51 18:39 »

Working for 5 years so far, that's hard to beat.  Most things purchased at the store seem to break sooner than that!
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kalpakchiev
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« Reply #4 on: April 14, 2010, 06:42:03 18:42 »

Most things purchased at the store seem to break sooner than that!

It is by purpose - customer have to buy new ones
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