1

I know Arduino modules aren't generally compatible, but this looks like it could be. It's the Keyes KY-005 infrared transmitter.

There doesn't appear to be a data sheet anywhere online (and that's even a question on Stack Exchange).

Its outputs are signal, 5v, and ground. Here's the best info I could get on it:

Operating Voltage:  5V
Forward Current:  30 ~ 60 mA
Power Consumption:  90mW
Operating Temperature:  -25°C to 80°C [-13°F to 176°F]

Could I not plug the 5v into the Raspberry Pi's 5v output on the GPIO board, the signal to GPIO-17, and ground to ground?

This is how it looks:

enter image description here

My goal is to output a strong enough IR signal to turn on a TV from a normal distance (a meter or so is fine). I got a weak IR LED to work with LIRC, plugged directly into the Pi's GPIO, but of course this signal was too weak.

I want to avoid a breadboard with resistors and transistors, etc. This appears to be the standard Raspberry Pi solution, which I hope to avoid:

enter image description here

2

Are there any other components on the module? From the dx.com page it looks like it's a bare LED. The 5V connection may not go anywhere.

IR LEDs are pretty current-hungry, and that's why the examples have a transistor to beef up the current. You may get a faint flicker connecting it directly (most cellphone cameras detect IR from LEDs quite well, btw), but you might not get the range you need.

2

Confirmed - Yes, this will work with the Raspberry Pi, and LIRC.

  1. Plug it into the appropriate GPIO ports (3.3V, ground, and GPIO 17), with the Pi off.

  2. Updated "/etc/modules" to include:

    lirc_rpi gpio_out_pin=17

  3. Recorded IR from a separate IR receiver (on port 18)

    sudo /etc/init.d/lirc stop

    irrecord -H default -d /dev/lirc0 -f NEW.conf

  4. Copied the LIRC file saved in NEW.conf to the end of "/etc/lirc/lircd.conf"

  5. Send/blast IR signals with the Raspberry Pi:

    service lirc start

    irsend SEND_ONCE {remote's name here} KEY_POWER

This sends a strong signal from across my living room.

I do appreciate the learning aspect of making your own breadboard solution, sometimes even hobbyists just want the end result. This is a much simpler solution than using resistors, transistors, etc.

  • Did you have to use any additional components while connecting the sensor to the Raspberry Pi? – Guru Prasad Jul 11 '17 at 9:50
  • No. I simply plugged each pin into the appropriate GPIO location on the Pi. Of course be 100% sure you're plugging things into the correct location, and the Pi is off while doing this. – gavanon Jul 11 '17 at 16:47
1

The linked device should work.

The only question mark is whether the Pi's GPIO high of 3V3 would be seen as a high input by the signal pin of that 5V device. It should be (at least I do not remember anyone saying they couldn't control the device from the Pi).

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