Atti2d

Greetings! I don't know for certain that this is the correct place or forum for this question, but any help towards the answer to my question, or a finger pointing in the direction of a site that might have what I'm seeking would be greatly appreciated! Here's the idea behind the question I have: :-\ For a couple years now there have been these units available that consist of a small controller attached to a pair of headphones and wrap-around glasses with the lenses blacked out. At least that is what comprised the unit I tried out a while back(probably 6 years ago!), and I know there have been some improvements to the design since then. Inside of the dark lenses of the glasses were mounted a couple LEDs of different colors symetrically placed behind each lense. A person could turn on the power to the unit and pick a preset 'program' that would produce certain frequency pulses to the LEDs while simutaneously playing audible frequency patterns through the headphones. The idea behind this is that by producing patterns that mimick the body's natural frequencies occuring in the brain when a person was relaxed, the unit could induce the same relaxed state in a person that was under a lot of stress. Similar patterns to induce sleep, concentration, etc could be programmed as well. What I'm looking for is the actual numbers representing these frequencies. For instance, say the LEDS are pulsed at 100hz in a left/right frequency of 2 hz, while 2 hz pulses of 100hz are fed alternately into the headphone speakers. I'm sure that these are not even close to what the actual frequencies should be, and that is what I'm looking for help with. ???Please help me out with any ideas you might have. I'd really, REALLY appreciate it! Thanks, Dan

Are solid state relays suitable for use in controlling a pump motor... such as a swimming pool pump? I have a 1HP pump (about 25A @ 115Vac???) that needs to be activated by a typical household appliance timer that is rated at 15A max. I figured the best way to do this is via a relay... a contactor... or a solid-state relay, the latter of which I have a number onhand with acceptable load handling capabilities. I just don't know if there is some aspect of the solid state mechanism that makes them unusable in this application. Thx for any help. Dan

Hi! I desperately need a design for a timer circuit. What I need is a relay control that will activate the relay for 10 minutes and then wait 4 hours before it does it again... on for 10 minutes, off for four hours, over and over and over... LOL ??? Any ideas or designs that anyone could throw my way would be oh so greatly appreciated! Oh yea, I would prefer to use only components that are common... NTE would be great as there is a local distributer open tomorrow morning where I can pick up supplies. ::) I hope I'm not asking too much... Thanks so MUCH in advance!!!! Dan ;D