They are almost always an open-drain pull down output, that goes low when the 38kHz IR signal is present. Being open drain they usually require a pull-up resistor on that pin, about 10k, to +5v....
1. Out: signal when received. When it "sees" a 38KHz IR signal it outputs a constant lever. I don't know offhand if it's normally high and low for signal, or the reverse.
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They are almost always an open-drain pull down output, that goes low when the 38kHz IR signal is present. Being open drain they usually require a pull-up resistor on that pin, about 10k, to +5v.
Occasionally you get one with a weak driver so the resistor needs to be higher, 33k or so.
These pins are the:
3. Vs: power supply voltage
2. GND: the zero voltage ref of the circuit, or return of Vs.
1. Out: signal when received. When it "sees" a 38KHz IR signal it outputs a constant lever. I don't know offhand if it's normally high and low for signal, or the reverse.
Number 3 and 2 give the device power.
Number 1 is what you connect to the rest of your circuit.
Please don't spam the forum.Hi ernieM
i am new here and i have an urgent circuit i need help can you please message me i dont know how to message you and i ried posting a new tread but its not posting??
One problem many noobs encounter is that the output will not be held continuously low when a steady carrier is received. It will go low briefly but then turn off. They are meant to receive burst data, not to act as a switch. This behavior varies and it's hard to tell exactly what the Shack is selling at any time. If this is the Vishay TSOP4838, it does indeed have the open collector described by RB. Not sure how it responds to a steady carrier signal.They are almost always an open-drain pull down output, that goes low when the 38kHz IR signal is present.