SIMPLEST way to send and recieve a SIGNAL

[jayfoo]

I am a product design student at CSU Long Beach working on my senior thesis project. It involves desiging a product to help people keep track of their progress in Gyms (ie, LA Fitness).<br>
It is still very conceptual, however I need to spec out a technology that I can use to send and recieve signals between free weights and machines and a wearable &quot;reciever&quot; (ie, a glove or watch). <br>
Basically, I need the to have a way for the weights to &quot;tell&quot; the reciever how heavy it is. For example, when a person picks up a 40lb weight, this reciever will know its a 40lb weight. Something like a BAR CODE scanner, but much simpler. I need suggestions for various technologies that I can consider to use for this product. PLEASE HELP!<br>
Thanks!<br>
<br>
Jonathan Fu

 

[Afkaa]

Just a quick thought but for simplicity you could use the same technology as that used in &quot;smartcards&quot;. Each device has a magnetic strip that details the relevant information and the user passes their receiver (glove, watch) near it.

 

[bfuchs]

Sensormatix and Fasson Roll have designed a coded sticker label (it includes smart wires), that can contain any info you want. It is based on a similar technology that is used on some bank notes in different countries, to authenticate them.<br>
<br>
It may be a bit expensive, but it'll be the way to go of the future.<br>
<br>
This smart wire can be included on any support (glove, tshirt, ..) but then the guy must wear the same tshirt... (I hope he washes it after the gym !)<br>
<br>

 

[wzkbrown]

Look at Garage Door Opener technology.&nbsp;&nbsp;Known and available thru Digi-Key.<br>k