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Here's a simple amplifier that will do the job. This however is just the starting point. Environment factors will make it a lot more fun than a simple non-inverting amplifier with the correct gain. Number one problem is that most resistance wire has a high temperature coefficient. Presumably...

My thoughts are: [ol 1] The human body is not calibrated and electrode placement is hit and miss, so highly accurate calibration is not required. All you need is a sanity check and maybe a feel-good demo (perfectly valid objectives!) Taking "attenuator" to mean voltage divider with impedance...

The contacts in a mechanical relay or switch consist of two pieces of metal that touch each other so that electricity can flow between them. However, under certain conditions metal contacts can become coated in insulating sulphides and oxides due contamination from the air. This can prevent the...

Ouch! David Stonier-Gibson http://splatco.com

Kravdave, look at embedded PLC manufacturers. There's an impartial comparison page here. At least one of those vendors will tailor make a controller to your requirements. With a custom built controller you will get exactly what you need, at the best possible price, and by definition serious...

Have you tried a colour temperature app for your smart phone? Android has at least one, no doubt that other brand will have them as well. I wouldn't expect them to be super-accurate, but a good free way of exploring your idea. Mine certainly gives sensible readings on daylight, incandescent...