Parallax 433Mhz transmitter/receiver range

drm

I'm using a pair of BS2s and·a Parallax 433Mhz transmitter/receiver pair·for an application that sends real-time data from an outbuilding (located 50 feet from a residence) back into·the residence.

Although the specs advertise a range of 150 feet, the signal appears to die just around 40 feet. Is this because the 150 foot range is specified for clear, line-of-sight transmissions?

Any tips that might help me boost the range?

Thanks!
--Donn Morse

Steve Joblin

More voltage on the transmitter... how much voltage are you providing?· What is the max voltage allowed?

drm

Steve Joblin said...
More voltage on the transmitter... how much voltage are you providing?· What is the max voltage allowed?

Steve,

I'm feeding the transmitter with the output from the 7805 voltage regulator on a super carrier board. I believe it's holding around 5 volts which is per the·data sheet. (The voltage regulator is fed by a 12V power supply.)

I just noticed in re-reading the data sheet that increased range can be obtained by placing a 1-foot square copper-clad board underneath the circuit and using this as a ground...I need to try this.

Thanks!

--Donn

Steve Joblin

I may have confused things by referring to a different product... I think you are referring to http://www.parallax.com/detail.asp?product_id=27996,

whereas I was referring to http://www.rentron.com/Stamp_RF.htm

I appologize for the confusion...