Re: 12 V for home-brew IR receiver

Eduard Refinius via LIRC-list <[email protected]> Fri, 28 Mar 2025 21:47:23 +0100
Newsgroups	gmane.comp.hardware.lirc
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> I would suggest using a 7809 which drops the voltage to 9V. Someone else
> suggested a 7805, and that's not what you want because its output
> voltage is 5V which falls far short of the minimum of 8V that you cite.

No, I didn't write what output voltage I need, and certainly not that I
need 8 V at the output. But now I write that I need 5 V as the signal leve=
l.

I connect the DCD line to the Arduino Mega 2560 and use the IRremote
library.

And in reality, I don't even know which voltage regulator is used in my
circuit. The circuit is built into a DE-9F connector that I bought 20
years ago as LIRC-compatible home-brew IR-receiver. I used it for a long
time on the serial port of multiple mainboards. I can't open it without
cutting the heat shrink tubing. And that's why I'm not opening it.

Everything I know I read here: https://lirc.org/receivers.html
It is written there:
"For most standard PC serial ports this will be approximately 10V. IC2
will convert the input voltage to exactly 5V. ... So you should make
sure that your serial port delivers at least 8V of output voltage."

I need exactly 5 V for Arduino Mega 2560. And I trust that my
LIRC-compatible home-brew IR-receiver converts the input voltage to 5 V
and I get 5 V as signal level for Arduino Mega 2560. I don't have an
oscilloscope to check the signal level. I tested my LIRC-compatible
home-brew IR-Receiverwith 12 V supply voltage. It works very well with
RC5 remote control and neither IR-receivernor Arduinobroke.

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    <blockquote type=3D"cite">
      <pre wrap=3D"" class=3D"moz-quote-pre">I would suggest using a 7809 =
which drops the voltage to 9V. Someone else
suggested a 7805, and that's not what you want because its output
voltage is 5V which falls far short of the minimum of 8V that you cite.</p=
re>
    </blockquote>
    <p></p>
    <p><span class=3D"Y2IQFc" lang=3D"en">No, I didn't write what output
        voltage I need, and certainly not that I need 8 V at the output.
        But now I write that I need 5 V as the signal level.</span></p>
    <p><span class=3D"Y2IQFc" lang=3D"en">I connect the DCD line to the
        Arduino Mega 2560 and use the IRremote library.</span></p>
    <p><span class=3D"Y2IQFc" lang=3D"en">And in reality, I don't even kno=
w
        which voltage regulator is used in my circuit. The circuit is
        built into a DE-9F connector that I bought 20 years ago as
        LIRC-compatible home-brew IR-receiver. I used it for a long time
        on the serial port of multiple mainboards. I can't open it
        without cutting the heat shrink tubing. And that's why I'm not
        opening it.</span></p>
    <span class=3D"Y2IQFc" lang=3D"en">Everything I know I read here:
      <a class=3D"moz-txt-link-freetext" href=3D"https://lirc.org/receiver=
s.html">https://lirc.org/receivers.html</a></span><br>
    <span class=3D"Y2IQFc" lang=3D"en">It is written there:</span><br>
    "For most standard PC serial ports this will be approximately 10V.
    IC2 will convert the input voltage to exactly 5V. ... So you should
    make sure that your serial port delivers at least 8V of output
    voltage."
    <p>I need exactly 5 V for <span class=3D"Y2IQFc" lang=3D"en">Arduino
        Mega 2560</span>. And I trust that my=C2=A0<span class=3D"Y2IQFc"
        lang=3D"en">LIRC-compatible home-brew IR-receiver</span> converts
      the input voltage to 5 V and I get 5 V as <span class=3D"Y2IQFc"
        lang=3D"en">signal level for </span><span class=3D"Y2IQFc"
        lang=3D"en">Arduino Mega 2560. I don't have an oscilloscope to
        check the signal level. I tested=C2=A0</span>my=C2=A0<span class=
=3D"Y2IQFc"
        lang=3D"en">LIRC-compatible home-brew IR-Receiver</span><span
        class=3D"Y2IQFc" lang=3D"en"> with 12 V supply voltage. It works
        very well with RC5 remote control and neither=C2=A0</span><span
        class=3D"Y2IQFc" lang=3D"en">IR-receiver</span><span class=3D"Y2IQ=
Fc"
        lang=3D"en"></span><span class=3D"Y2IQFc" lang=3D"en"> nor=C2=A0</=
span><span
        class=3D"Y2IQFc" lang=3D"en">Arduino</span><span class=3D"Y2IQFc"
        lang=3D"en"> broke.<br>
      </span></p>
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