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Small Receiver

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sherby:
Hey Guys, i was building a project where i require to give a signal to a robot wirelessly. The Robot is of very small size.
I need the receiver to be very small,the signal could be digital, as only 1 actuator need to be activated on a signal from transmitter.

The Size of transmitter doesnt matter, but i was looking for the smallest receiver possible.
Is there something you guys would know of, that could help me on this.

There is one at Sparkfun,
https://www.sparkfun.com/products/10534
the receiver is the same size, however i was looking for something much smaller.
Any suggestion will be appreciated.

Thank You

jwatte:
That Sparkfun module looks like it's only about 10 mm x 14 mm or so. You need smaller?

Perhaps see if you can find a FM Radio receiver chip in surface mount size? It may either be possible to change this to receive on an open-ish band, or tune it down below 88 MHz and keep the power so small that nobody will notice/mind for a hobby project (might or might not be technically legal in your locale.)

The Si4313 is available in 20-VQFN: http://www.digikey.com/product-detail/en/SI4313-B1-FM/336-1980-5-ND/2340775 but it needs support circuitry

The Alpha modules are kind-of small, but probably no smaller than the Sparkfun ones: http://www.digikey.com/product-detail/en/ALPHA-RX915S/ALPHA-RX915S-ND/2000721 (note: the pin spacing is much tighter than 100 mil)

In the end, a super-dumb AM receiver is just a tuned filter, which you may be able to build in a very small form factor using the smallest available components, but it's unlikely to be a simple project, working at RF frequencies...

johnwarfin:
simplest solution is a tiny low cost rc rx. small flysky units can be had for around $10 and the radio controller aint much more. for really small theres 200 milligram diy versions. google is your friend.

jwatte:
All the micro receivers I can find are bigger than the Sparkfun one posted in the original request.
Do you have links to smaller ones? That would be useful.

fester225:
If you only need 1 channel, could you use light?

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