RRW1B • 18
TROUBLESHOOTING THE RRW1B
PROBLEM: No matter how I adjust R20, the LED will not light.
SOLUTION: Check the orientation of D20, it may be you installed it back-
wards. If not, check your power, you should see +5V on pins 5 and 6 of U20. If
you have no power, check the wall transformer to make sure the center lug is
plus, and the ring is minus. AC transformers like the AC125 should be no
problem.
PROBLEM: The green LED doesn’t light up and blink when I aim my remote
at it.
SOLUTION: There is a lot that can go wrong here, so we will go from the most
likely to the least. We will assume D20 has lit up at some point before you ad-
justed R20. 1. If you have not tested the RRW1A, do so at this point, it may
not be transmitting. 2. You are too far away from the transmitter, bring them
closer together. 3. You have the squelch control (R20) turned too far up, try
turning it back to where the LED is just flickering, and see if the remote begins
to make it blink or not. 4. The receiver has a assembly problem. Check part
installation and orientation.
PROBLEM: Everything else is working, but my devices aren’t responding to
the remote signals.
SOLUTION: You will need to check your IR LED installation. It is easy
enough, just swap the red and black wires on the screw terminal. Things
should start working nicely unless there is an assembly error on the board.
Power Supply:
• AC supply = 6 to 12 VAC or DC supply = 8 to 16 VDC @ 100 mA (+ tip)
• Current draw with a 12VDC source averages about 20 mA (RRW1B).
Dimensions
:
• PCB size: 4.0” x 4.7”
• Max component height: 7/8”
Miscellaneous
:
• Works with any standard 38 kHz carrier IR remote.
• Max effective BAUD rate: 2400 bps – standard for remotes.
• IR receiver module has an effective pick-up range of 11 meters (36 feet!).
• Max IR LED (D22 of RRW1B) wire extension length: Unknown!! Tested
over 750 feet and still going!
RRW1B SPECIFICATIONS
