touch sensitive switches

How much current? I'm thinking a membrane switch or capacitive touch sensor connected to a power relay.

>>1082522

Simple capacitance switch but it has to be backed up with an SCR for high voltage.
Haven't built one of those in years. Will have to see if I still have designs floating around.

>>1082549
Ah heck, the design is here.
http://english.cxem.net/guard/guard2.php
http://www.discovercircuits.com/DJ-Circuits/120v1out.htm
I have a much more cut down version but with todays raspi etc it's easier to just use it as a sensor.

>>1082522
Depends on your skill level. As an eet I'd probably use a differential comparator for the sensing running a latch hooked to an ssr.

File: sku_223670_1.jpg (29KB, 600x600px) Image search: [Google]

29KB, 600x600px

You could try this one, it can be set for toggle mode (which is what you need). Then just scratch away the silk screen on the touch pad and solder a wire to your aluminum square and see if it works. If it does work, use it to switch a solid state relay.

I think it uses TTP223. If it doesn't work you could try to play around with the tuning capacitor (see datasheet) but you'd have to start soldering.

http://www.dx.com/p/meeeno-capacitive-touch-sensor-module-for-arduino-black-orange-223670#.WCZQ5rUkoWM

There's also an Arduino library for capacitive sensing.

http://playground.arduino.cc/Main/CapacitiveSensor?from=Main.CapSense

That's so last century ... just throw a micro at it.

>>1082565

Oops, that was meant for >>1082554

>>1082549
>>1082551
>>1082563
i should have mentioned id like it to fit into something the size of a single gang switch box

>>1082551 Dont use this primitive discrete circuits. They just cant be reliable.
>>1082563 Arduino for a simple switch? Hell no.
>>1082522 Sorry, no modules for ya. You will need to solder it by yourself.
http://www.nxp.com/documents/data_sheet/PCF8883.pdf