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ir led&receiver couple communication

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adnan_merter

adnan_merter

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hi all,

i need to establish a communication my device to electronic tariff meter via ir led and receiver with rs232 protocol.

so i need to know how i can use ir led and receiver with max3232(3.3 version of max232). Forward voltage of optical components is between 1.2v-1.3v.

please tell me what kind of peripheral components beside of max3232 and ir couple i should use.(transistors, resistors or driver ICs).

thanks (by the way no modulation needed, just 9600 baud is enough)
 
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hi thanks for reply, the answer of your question is NO.
the meter doesnt include an irda modul.
it has just one 5mm ir led to receive and one photo diode or phototransistor or whatever to transmit
so i need a similar circuit with ir led and phototrans. to communicate

i think i need some transistors to drive the opto parts. and invert my rs232 signal
 

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