2 bit RF control without microcontroller

RFwireless

I would like to wirelessly transmit 2 bits without a microcontroller (basically control 2 LEDs wirelessly…), as having several receiving nodes the cost of the project would be driven very high.

I thought of using cheap AM RF modules (such as the Quasar QAM-TX1 coupled to the QAM-RX2), then code the 2 bits on the frequency output of an astable 555 and count it on the other end, but the system gets quite complex, difficult to implement (I am currently struggling to a. get a frequency which is multiplied by 2, 4, 8 from 2 switches only).

Am I neglecting an easier option?

Best Answer

Here's what the OP suggests and I've pointed out that you can buy a chip that directly interfaces with both ends that gives you 4 independant switches: -

QAM-TX1 in Farnell costs about £3.00 which means you can probably buy it for $3.00 elesewhere. The REF600E costs about £2.50 in Farnell and the same reasons as above will cost about $2.50: -

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For the receiver the QAM-RX2 (as specified cost from Farnell £3.65 and so you can probably get it for $3.50. The RF600D is £3.12 from you know where and probably $3 elsewhere.

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It's about as cheap and uncomplicated as it comes without a micro but maybe there are other options.

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