This little circuit will be valued
highly whenever a signal is
required for the testing of
infrared receivers. In most
cases, such a test is possible
without having the associated
remote control available. Of
course, the test will then be limited
to just the infrared sensor
device in the receiver, but it’s
incredibly useful to begin with
when it comes to faultfinding in
an infrared controlled system
like a TV set or a VCR. The
combination of this test transmitter
and the simple infrared
receiver described elsewhere in
this issue yields a simple onechannel
on/off remote control.
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