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assuming the connections are correct,is the tuned freq: correct? , u may require a fine tuning near the 38k band,dhw2leo said:I have constructed an IR motion sensor using TSOP 1238 and IR LED. I use a 555 timer to generate a 38kHz carrier frequency but the TSOP does not detect the IR signal. It still remains high! Can somebody help me with this?
I have adjusted it! But I just simply fail to make the circuit work!!! Can anyone give me a reference IR proximity sensor circuit using TSOP receiver module?
dhw2leo said:I have adjusted it! But I just simply fail to make the circuit work!!! Can anyone give me a reference IR proximity sensor circuit using TSOP receiver module?
The IR receiver module I've used were unmarked, but work the same. They have gain control built in. Also the plastic case is IR invisible, and can pick up a signal from pretty much any direction. I had some problems on my first build, the emitter and receiver were mounted next to each other. The receiver was getting drowned out, until I put a physical barrier between them, tin foil...
Are you sure the Receiver module is working and hooked up correctly? You can hook an LED to the output pin, and use a TV remote. The LED will be on constantly, then blink when you press a button.
thank u Mr.Harvey for the information u gave. i m just starting with RFID. collecting information to start designing it. jst nw entering the practical field, thts y i hve lots of doubts rgarding this.