Need to add 50 feet cable to the Parallax Infrared Receiver. ( I am using Bs2e)

markuster

Hello,

I want to detect an object . And I am using the Parallax Receiver
and the transmitter.


I need to add 50 feet cable between the Basic Stamp and the receiver
but when the distance between the Basic Stamp and the receiver is
more than 15 feet , I can not detect the object.


Questions:

A: How can I increase the signal of the receiver ?

B: I am sending 38500 Hz to transmitter, but
I don't know if the infrared transmitter can work
with 50 feet cable too.

Perhaps 50 feet is to much for both ( the receiver and
the transmitter)

I must not reduce the distance between the Basic Stamp 2e and sensor.

Please, help , I don't know what can I do.
Do you have some information ?

Thanks, Mark

SRLM

Well, for starters you can figure out how much resistance is in the wire. Find the gauge, look up the ohms per foot, and multiply. Then figure out how much the voltage drops with that new resitor in there. You may be able to get better results by going with a bigger wire (less resistance), or by putting in a high voltage (on the Vin line) at one end, and putting a regulator to get a nice 5 volts at the other end.

allanlane5

You could put a max232 chip at both ends. This is an RS-232 driver/reciever chip, which will drive a signal 50 feet or more. You'll need to put 'power' wires in the connecting cable, to provide power at the remote end.

So, your cable now needs:
1. LED-Out
2. DecoderSignal-IN
3. Ground
4. Vin

And your remote board, with the IR-LED and Decoder, needs a 3840-5 linear regulator to drop Vin to +5, and a MAX232 chip with 4 capacitors.