'Infrared Detector'. - One of the Infrared Detector is by Replacing the Panasonic 4602M. The Panasonic PNA4602M is discontinued and is difficult to buy. Fortunately, the Vishay TSOP4038 is a compatible (if not a superior) drop-in replacement. Both modules are three-pin through-hole components that detect continuous infrared signals modulated at 38 kilohertz.
The PNA4602 was popular in robotics for obstacle detection and navigation. I’ve used it for mini-sumo (Bugdozer, Have A Nice Day, No.2) and room exploration (Roundabout). Officially, the intended purpose of the PNA4602 is as a remote control receiver demodulator (Streamhawk, Jet).
In fact, I relied on that sensor so much that I was despondent when I discovered the PNA4602M was listed as obsolete. At first, it seems like there are lots of comparable sensors that can be substituted, but it turns out they only accept bursts of signals instead of a constant 38 kHz emission. This is acceptable to many electronic projects controlled by a microcontroller, as they can turn on the signal, read the detector output, and then turn off the signal. Unfortunately, simpler circuits with a 7400 NAND oscillator or 555 oscillator are difficult to add intelligent quiet periods to. Thus, most infrared detector modules are incompatible for continuous object detection.
Fortunately, you can swap the TSOP4038 for the PNA4602M in almost all situations. The Vishay TSOP4038 can be purchased at Mouser Electronics (782-TSOP4038 $0.70).
Comparing PNA 4602 to TSOP 4038
Both infrared detector modules have a similar package, with the TSOP4038 case being 33% smaller.
Figure 2. Panasonic PNA4602M and Vishay TSOP4038 pinouts
Continue from original source: http://www.robotroom.com/PNA4602M-Replacement-1.html
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