so i want an efficient mechanism to detect the presence and absence of a wall abt 3-5 cms from the machine
i was thinking of using tsop 1738 but wid the transmitter that i made i am getting only a pulse at d o/p pin of tsop instead of a continuous active low signal:!:
pls help
if anyone cud tell me what i can do to remedy that or if anyone has a circuit that he/she has tested already it would be of gr8 help
i was thinking of using tsop 1738 but wid the transmitter that i made i am getting only a pulse at d o/p pin of tsop instead of a continuous active low signal:!:
TSOP1738 works in burst mode. If your transmiter send a continous 38kHz signal, the signal is supressed by TSOP1738 circuitry. In this case, only a pulse will be generated.
In data sheet (www.vishay.com/docs/82030/82030.pdf) all suitable data format are described on page 3.
I don't know where to get it in India - mabe you can contact SHARP-India ..
Anyhow, here is a couple of references incluing prices: **broken link removed** http://www.junun.org/MarkIII/Info.jsp?item=30
instead of tsops use ir tx /rx pairs which r very common.u can use in top down mode or side seeing type.if using side seeing fashion, calibrate the values given by d ADC to ur logic n use it to detect walls .